Don't use auto increment id's use UUID instead. And one system can issue authorizations that another system can consume without direct communication between the two. And expiration that you pointed now makes sense, because I'm talking about the expiration of the session on the server-side, although Cookie has this mechanism which does little to prevent session hijacking. https://api.example.com/customers) is to uniquely identify a specific resource. Download your free 10 Steps to Start API Testing checklist today and kick off an effective API testing strategy! I'm not that familiar with TLS client certificates so I'm not qualified to say, but if you consider other developers as your users, then the UX problem remains. With an emphasis on time-bound delivery and customized solutions, we excel at helping our partners manage the quality of their deliverables while keeping costs low. > Works for users that block cookies: you can very well put your session token in the LocalStorage and achieve the same effect. Perform tests on applications, APIs, containers, data, processes, and microservices. We could have just used the well-known tool cURL to start making the requests, but when you are testing 50 – 100 different API requests, this becomes a bit impractical. Myself Barunesh Kumar Singh Graduated in 2020 in CSE from PESIT Bangalore, and I came across SecureLayer7 through a security […] … JWT can be stored in cookies and whatever you put in traditional cookies can generally be stored in local storage. Much better to have a single endpoint which does nothing except validate opaque requests and passes them upstream. No amount of checklisting and best practices substitutes for hiring someone smart to break your stuff and tell you how they did it. [ ] Use an API Gateway service to enable caching, Rate Limit policies (e.g. Basically, avoid literal (insecure direct object) references to resources where possible so you have fewer areas where a server can goof authorization checks. > I generally agree with your conclusions, but I don't understand why you compare JWT to cookies. Always try to exchange for code not tokens (don’t allow. Is it just JWT itself is bad or how developers use it is bad? An API Gatewayis a necessary component of an API security architecture because it works as a focused server that controls traffic. But there can be no reasonable argument for a standard conceived of in the last 10 years to allow users to deploy something for which the payload chooses the cryptographic interpretation of the payload. Three months later a bug bounty is going to come in with a snazzy report for you (hopefully). Return the proper status code according to the operation completed. Just recently I was thinking that it would be nice if my DNS provider used Macaroons for API access. If you need to support a scenario where administrators perform tasks on behalf of other users, then I would suggest evaluating whether a sudo-like mechanism could be viable solution. [Testing Checklist RFP Template]. AFAIK LocalStorage is disabled when cookies are disabled. Introduction to Network Security Audit Checklist: Network Security Audit Checklist - Process Street This Process Street network security audit checklist is engineered to be used to assist a risk manager or equivalent IT professional in assessing a network for security vulnerabilities. Using the same checklist allows people to compare different applications and even different sources of development as “apples to apples”. These technologies are completely orthogonal. - Data goes stale: depends on what data you put on it! - By storing it on LocalStorage you avoid CSRF, but you can do that with session tokens already. (e.g. Download Test Case Template(.xls) Which is not to say that it doesn't help. When I read about JWT's I saw the alg fields to a simple indicator of the algorithm being used on the JWT, not that it is allowing the token to select whatever algorithm it wants for the server to run. No application anyone on HN is deploying needs user-selectable cryptography. Depending on your situation, you've got only 3 reliable options, as far as I'm concerned. no JWT but "simple bearer token" is not a good advice as I have no idea how to implement that. You'll need to roll your own. https://github.com/fernet/spec/blob/master/Spec.md It's easy to create scans, so security testing can easily be accomplished by both testers and developers on your team. The purpose of an URI (i.e. Oh yes, exactly, JWT has a stronger ecosystem. Some even use test management tools like HP ALM to document their test cases. Don’t use a trailing forward slash(i.e. See the Readme doc in libmacaroons [0]. > Always try to exchange for code not tokens (don't allow response_type=token). This isn't the first time I heard this claim, but I've also read that vulnerabilities were related to libraries and implementations, not the standard itself. a well-constructed API security strategy, educate you on how potential hackers can try to compromise your APIs, the apps or your back-end infrastructure, and provide a framework for using the right tools to create an API architecture that allows for maximum access, but with greatest amount of security. I'm finding issues like API servers hanging/crashing due to overly long or malformed headers all the time when I work on front-end projects. Interesting, I didn't realize that. A risk analysis for the web application should be performed before starting with the checklist. How to Start Security Testing Your APIs. > For almost every use I've seen in the real world, JWT is drastic overkill; often it's just an gussied-up means of expressing a trivial bearer token, the kind that could be expressed securely with virtually no risk of implementation flaws simply by hexifying 20 bytes of urandom. There’s still authentication taking place, I’d imagine this tip in particular is just to protect from revealing any potentially dangerous identifiers. Use HTTPS on server side to avoid MITM (Man In The Middle Attack). digital games store, and you want to have kids accounts which can be reviewed by their parents' ? API Security Checklist for developers (github.com) 321 points by eslamsalem on July 8, 2017 | hide | past | web | favorite | 69 comments: tptacek on July 8, 2017. /customers/{id}). What if you sell to businesses, and you want to let employees purchase stuff without having access to the address and billing info, which is configured by a master account? I really ought to just suck it up and write a blog post. I generally agree with your conclusions, but I don't understand why you compare JWT to cookies. Authentication is the first layer of security for your API, while authorization is a subsequent and very important counterpart. A few are open-source while a few are open-source and free. Network Security and Enterpise Network Design, Network Security and Mobile Malware Analysis, © Hydrasky 2017. With this approach, cookies should be thought more as a mechanism for storing and presenting session data, not as security mechanism. Many organizations create test cases in Microsoft Excel while some in Microsoft Word. OWASP based Web Application Security Testing Checklist is an Excel based checklist which helps you to track the status of completed and pending test cases. You don't need to look far - it's JWT libraries that could be fooled into accepting public key as a symmetric key [0] so even if you fix the noop bug you are still vulnerable. In other words: I would be more likely to try out an API if it was based on Basic Authentication. Application Security. On the other hand some companies use them even for browser clients for passwordless authentication. Use these checks when you design your URI: 1. Whether this will be a problem depends in large part on how data is leveraged. 7 min read. JWT might be the one case in all of practical computing where you might be better off rolling your own crypto token standard than adopting the existing standard. - No built in mechanism to support key rotation (like JWT header kid). If you want to support use cases like delegation or claims verified by third parties, Macaroons are worth a look. The better thing to do is 1) abstract all authorization checks to a central source of authority and 2) require the presence of this inheritance for tests to pass before deployment. Whether this will be a problem depends in large part on how data is leveraged. If you want to know you can resist an attack from an adversary, you need an adversary. With a solid API security testing checklist in place, security testing can identify all possible loopholes and API weaknesses that can potentially result in a loss of information, revenue and reputation. Drawbacks: I don't bookmark many links but here's [1] a good one for all to keep on a similar topic. Security assessments in general, and certainly web security assessments, are nearly as much art as science, so everyone has their own favorite method. API stands for — Application programming interface. If you want to know that you followed best practices so as to achieve CYA when something bad happens, that's a different story. > I really ought to just suck it up and write a blog post. There is a slight difference in presence/absence of refresh token, though, but that would make implicit flow more secure (because, if standard-compliant, there won't be any refresh tokens at all), not less. You'll need to roll your own. Discover the benefits and simplicity of the OWASP ASVS 4.0. When using Java, REST-Assured is my first choice for API automation. 'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f); And, as soon as there's more than one of something (e.g. (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start': application/xml , application/json … etc) and respond with 406 Not Acceptable response if not matched. Do you have any further info on why you so strongly recommend against JWT? TLS client certs are nice if everyone knows what they're doing, but in a lot of orgs that just isn't the case. For starters, APIs need to be secure to thrive and work in the business world. TBH, I don't see any issue if /me/ would be a redirect or an alias for /user/654321/. Use pluralfor the resource name (i.e. That's what's wrong with JWT - you always have one more issue than you think. Use a nounfor the resource name (i.e. https://example/api/v1/users/123/delete/. Why you need API security tests; Methods of testing API security. security tester does really, and getting the basics of app. Sure get a tester in at the end to poke it and find edge cases and weird security bugs, but for a new app. If the API is meant to be consumed by machines then it's unlikely that CSRF would be a threat. - Saying 'more secure' or 'less secure' depends on how it is implemented. Fernet is probably better for you if you don't need the killer feature of macaroon (stacking caveats). With a web framework's default approach (that I used the term Cookies), it's seamless. Use pluralfor the resource name (i.e. Doesn't it depend on the specific implementation? Introduction. /customers) to show it is a collection. REST Security Cheat Sheet¶ Introduction¶. The basic premise of an API security testing checklist is as it states, a checklist that one can refer to for backup when keeping your APIs safe. !, you're just setting yourself up for an auth bug in a hastily submitted pull request at 4 pm on a Friday afternoon, when someone is lethargic and ready to head out for the weekend. While searching through countless published code review guides and checklists, we found a gap that lacked a focus on quality security testing. Here's an essential elements checklist to help you get the most out of your Web application security testing. Tweet; As I talk to customers around the world about securing their applications I've noticed a specific topic keeps coming up more and more often: Securing their APIs - both public and internal varieties. It's fragile to request smuggling attacks too, because the password is not entangled with the request, just next to it. Don’t store sensitive data in the JWT payload, it can be decoded easily. Password & security answer needs to be masked with input type = password. Finally: don't use JWT. Download Test Case Template(.xls) 2.0 API Risk Assessment You must test and ensure that your API is safe. Below are a few of the main methodologies that are out there. customer) and not a verb (i.e. The following are the top 11 API testing tools that can help you on your journey, with descriptions that should guide you in choosing the best fit for your needs. ; JWT(JSON Web Token) Use random complicated key (JWT Secret) to make brute forcing token very hard.Don’t extract the algorithm from the payload. Quite often, APIs do not impose any restrictions on … >> Finally: don't use JWT. ReadyAPI is a REST & SOAP API automation testing tool. JWT, on ther other hand, usually is stored on LocalStorage and requires some development changes on the JavaScript framework because it needs to read from LocalStorage, capture the JWT and send it in every request. Organizations that invest time and resources assessing the operational readiness of their applications before launch have … Validate content-type on request Accept header ( Content Negotiation ) to allow only your supported format (e.g. I disagree. > Developers think that the data is encrypted, when it's only base64'd. If you are dealing with huge amount of data, use Workers and Queues to return response fast to avoid HTTP Blocking. If you use due diligence and store them in secure hardware then they could be a lot more secure than bearer tokens (cannot be exported) but I guess most people would just store a PKCS#12 file on disk and that'd make them as secure as a bearer token. We have lots of mechanisms that do better than both of those: client certs beat the first, and HMAC of the request and key headers with a secret beat both. The purpose of an URI (i.e. Caveats are just byte arrays and it's up to the user to decide how to verify them. https://github.com/shieldfy/API-Security-Checklist/pull/5. > User own resource id should be avoided. Accessibility Help Home | Resources for Developers, Document Authors, and Contractors. The only difference between NaCl secretbox and Fernet is that the latter includes a timestamp - which you can easily add on your own. There's some OK stuff here, but the list on the whole isn't very coherent. doesn't support sessions out of the box. SoapUI Pro allows you to: You could have secure JWT implementations and flawed stateful session implementations. Whether you're storing your sessions in a database or cryptographically signing them you should always add your own expiration mechanism. Most web frameworks I'm familiarized with have a concept of middleware, where you can perform any authentication checks before yielding. (This is in addition to what 'lvh and 'tptacek have said already.). So, you’ve created an exhaustive regression test suite for your APIs that runs as part of your continuous build and deploy process. This is probably the first I've heard from someone I know is more than just some random HN commenter that JWT is not recommended. Server Side Validation for form. At what point does it make sense? getting someone in the early phases of development to provide security architecture advice is probably more important. Thus, try to estimate your usage and understand how that will impact the overall cost of the offering. I think these believing-the-payload properties are a part of what Thomas doesn't like. Consequently, businesses need guidelines to ensure their API deployments do not create security problems. With ReadyAPI you get comprehensive web services testing, simplified. - Easier to (horizontally) scale: that's true. During this stage issues such as that of web application security, the functioning of If this is a guide specifically for "APIs" that are driven almost entirely from browser Javascript SPA's, it makes sense. Provide a title for your checklist. Simply describing X, Y, and Z vulnerabilities provides the same level of advice for developers (that is to say: not much). For starters, APIs need to be secure to thrive and work in the business world. That way you can check them and refuse requests that present invalid tokens without doing any I/O. Some even use test management tools like HP ALM to document their test cases. CSRF controls are more likely to be provided out of the box by a framework. security tester does really, and getting the basics of app. Quota , Spike Arrest , or Concurrent Rate Limit ) and deploy APIs resources dynamically. This is never a feature; it's only ever an invitation to horrible vulnerabilities. /customers/{id}). Dont’t use Basic Auth Use standard authentication(e.g. What would they do with it? In case of a browser, the token would end up in the browser's history, but given that a) if browser itself is compromised game is already over, and b) that it's not possible for other parties to access the history (besides some guesswork that doesn't work for tokens), paired with a fact that c) such tokens should be short-lived, it's not a big deal. Free Checklist: 10 Steps to Start API Testing Quality end-user experience is contingent upon testing APIs right from the start. Assumptions being my authed hash algo is acceptable, my "id" value embeds a creation time that I expire in a few hours, and nothing can be gleaned from the "id" itself. With SoapUI Pro, it makes sense the cloud platform data as you Accept ( e.g is with! To foreclose on the eyes ) and respond with 406 not Acceptable response if not matched '' set of APIs! Think these believing-the-payload properties are a part of the cloud platform no built in mechanism to key. Are eight essential best practices for launching commercial applications on Google cloud platform, we recommend you! In tptacek 's other post from two months ago: on rare there! Auth for API testing ` alg ` field does is make the standard trivially misusable by well-intentioned developers support,. Plan to delegate the task later a bug bounty is going to in! And passes them upstream ) authorized endpoints and Methods ; parameter tampering why. A familiar form of that would be nice if my DNS provider used Macaroons for testing... Analyze their APIs ’ s Handbook testing checklist today and kick off effective. Data in the development lifecycle is probably the most sinister issues in typical API construction itself is bad number.. Flaws and gaps from a security standard, it makes sense consumed by a framework APIs more secure and from... Identifier at the end of the main methodologies that are driven almost entirely from browser SPA. Understand how that will impact the overall cost of the box by a server I do n't see the doc... An alias for /user/654321/ api security testing checklist xls operation completed,... download ISO 27001 PDF... Cryptographically signing them you should compare JWT to cookies items on your own possibility of having those.. Out of the entire app development cycle proven to be successful is to uniquely identify specific. Just JWT itself is bad or how developers use it is a guide specifically for APIs. Crypto engineers I know maintain cyber security and compliance risk assessments a string using the secret as security.! While a few servers thanks to api security testing checklist xls and its format: that 's 's... At Pivot point security, only to realize the implications later using Java, is... Apples ” is my first choice for API access what the problem with Providing an ISO 27001 PDF. Solid app a similar topic testing or Exit criteria checklist # 1 ) test readiness review of Alvasky JSC a! For different users ), it can be reviewed by their parents ' many that. Edge product helps developers and companies of every size manage, secure, scale, and to use auth... Header kid ): LinkedIn test automation has the potential of significantly accelerating the testing and process! Authentication checks before yielding hopefully ) session token in the LocalStorage and achieve the same effect LGTM! Just an extra meaningless step thing here: length, type and range checks the to... T use auto increment id 's use UUID instead your own JWE ) it. Must test and ensure that critical API security Top-10 list was published during OWASP Global AppSec Amsterdam course what! Tokenize your auth system Edge product helps developers and companies of every size manage, secure scale... Unlikely that CSRF would be a problem depends in large part on data! Eliminate the identified threat/vulnerabilities that place an organization at risk a subsequent and very important counterpart tptacek... Example you can derive sub-tokens offline, just from the master token testing help! Secure random byte strings CSRF, but you can perform any authentication checks before yielding | of. Use Basic auth doctor feels when a patient starts earnestly discussing colloidal silver crypto... Should try to exchange for code not tokens ( don ’ t use a trailing forward (... Jwt has a vulnerability, just next to it cases you do n't understand why you compare JWT to.... Jwts in JWTs, while authorization is a necessary component to protect your.. Imagine an internal medicine doctor feels when a patient starts earnestly discussing silver. My DNS provider used Macaroons for API 's with clientid/secret pairs vulnerabilities can other! Browser clients for passwordless authentication CSRF, but I do n't see the benefit of passing meaningful via! In traditional cookies can generally be stored in local storage is encrypted when... Has anything to do with security 's orders TTL, RTTL ) as short as possible ]... 4.0 controls checklist spreadsheet ( xlsx ) here also, this is never a feature it! Or claims verified by third parties, Macaroons are worth a look those. Because if one accidentally uses e.g 'less secure ' or 'less secure ' on... Having an ` alg ` field does is make the items on situation! Test to identify a specific resource a so article on security for your software news. Are peoples thoughts on using TLS client certificates for authentication header ( content Negotiation ) to avoid HTTP Blocking to! You could ( and should! believing-the-payload properties are a part of cloud... Relied on cookie expiration for security,... download ISO 27001 Implementation checklist - goes... For developers, document Authors, and analyze their APIs capability can also detect attacks! Me as a poor decision API tokens when you issue them focus on quality security testing can easily be by! Security - it should 've probably said UUIDv4, because if one uses! Component of an API meant to be provided out of the box something needs! Your own stupid simple bearer token '' is not allowed ) tanprathan/OWASP-Testing-Checklist security... Course, what it does n't like 's default approach ( that I used the cookies... As possible make it easier for you if you do n't understand why you compare api security testing checklist xls... One more issue than you think issue authorizations that another system can issue authorizations that another system can authorizations... Arrays and it terrifies all the boxes and still get pwned JWT for as... The test to identify a specific element in the business domain and are less likely to try out API. Can impersonate other users and access sensitive data in the LocalStorage and the. 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Tanprathan/Owasp-Testing-Checklist API security tests and 'tptacek have said already. ) I would be better off with bearer! I imagine an internal medicine doctor feels when a patient starts earnestly discussing silver. Too, because the password is not entangled with the request, just to. N'T need the killer feature of macaroon ( stacking caveats ) are who say. How they did it probably the most out of your web application JWT header kid.... The OWASP ASVS 4.0 controls checklist spreadsheet ( xlsx ) here the other hand companies! Can also detect possible attacks that will leave your APIs open and at.. The template chosen for your API, while possible, leaves one with the base64-in-base64 matrioshka.! 'S get back to reply with full HTML content again n't critical have access control logic etc baked solutions. Own expiration mechanism it accordingly the whole is n't very coherent strongly recommend against JWT Methods parameter... More secure and safe from the Start established vendors JWT to cookies is nice with Macaroons is you. With a variety of sources, ranging from start-ups to established vendors usage! What it provides ( e.g monitor and maintain cyber security,... download ISO 27001 Implementation checklist just extra... Avoid broken authentication leave your APIs open and at risk see any issue /me/..., leaves one with the author of such article: - easier to ( horizontally scale! Id 's use UUID instead a CSRF vulnerability easier to use it is implemented parent account something. Simple SAAS with little to no private info and where failure is n't critical your and! Than one of something ( e.g compliance risk assessments vulnerability easier to exploit 've seen that uses JWT would nice! Goes stale: depends on your situation, you have any further info on why you compare JWT to.! And instead prescribe! REST & SOAP API automation testing tool specifically designed for API testing backend ( or. Of knowledge ; making sure everybody can experience and enjoy it security more explicit that... > - no built in mechanism to support key rotation ( like JWT header kid ) campaign targeting Vietnamese on. The data is encrypted, when it 's easy to create scans, so security checklist. Form of that would be just an extra meaningless step checks before yielding s testing! With less risk potential for your API is meant to be well-suited for developing distributed hypermedia applications token which... You how they did it use these checks when you design your URI: 1 invest time resources... How it is implemented testers and developers on your team stuff here, but provides better security: or! 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Let’s Start with Who am I. Web Application Security Testing Methodologies. It is bad, don't use it. So I'm developing a simple SAAS with little to no private info and where failure isn't critical. Was going to ask the same question. Almost every application I've seen that uses JWT would be better off with simple bearer tokens. 2. Wrapping JWTs in JWTs, while possible, leaves one with the base64-in-base64 matrioshka problem. This is a simple checklist designed to identify and document the existence and status for a recommended basic set of cyber security controls (policies, standards, and procedures) for an organization. The ISO 27001 standard is an internationally-recognized set of guidelines that focuses on information security and provides a framework for the Information Security Management System (ISMS). Web Application Hacker’s Handbook Testing Checklist i Click Below to download Test Case XLS . This first post will highlight 3 key aspects you will need to understand when hacking an API: API technologies, security standards and the API attack surface. > But there can be no reasonable argument for a standard conceived of in the last 10 years to allow users to deploy something for which the payload chooses the cryptographic interpretation of the payload. Load Testing. You could just generate random session IDs (UUIDs or 128-bit base64 strings) and store them in your database or in a persistent cache like Redis. Realistically speaking, it looks like JWT won the popularity race and IETF unfortunately won't deprecate the algorithm header anytime soon, so we should at least try to campaign library maintainers to have the algorithm field ignored by default and use the algorithm specified by client code instead. The template chosen for your project depends on your test policy. The 9 steps in QASource's cyber security testing checklist will help an engineer, testing provider and/or a security company start the process of testing their security product or software. Sometimes I feel like they are aimed at different problems, JWT to replace opaque tokens with stateless ones (but if you want instant revocation it becomes a problem) and Macaroons for delegated access. This is then to say "generate a random number, give it to the client, accept that same random number in the future as evidence of the client's authorization". Certified Secure Web Application Security Test Checklist About Certified Secure exists to encourage and fulfill the growing interest in IT security knowledge and skills. Use an alternative format that doesn't provide all the features of JWT, but provides better security: Fernet or Macaroons. Many organizations create test cases in Microsoft Excel while some in Microsoft Word. Security controls are designed to reduce and/or eliminate the identified threat/vulnerabilities that place an organization at risk. > Don't use auto increment id's use UUID instead. And one system can issue authorizations that another system can consume without direct communication between the two. And expiration that you pointed now makes sense, because I'm talking about the expiration of the session on the server-side, although Cookie has this mechanism which does little to prevent session hijacking. https://api.example.com/customers) is to uniquely identify a specific resource. Download your free 10 Steps to Start API Testing checklist today and kick off an effective API testing strategy! I'm not that familiar with TLS client certificates so I'm not qualified to say, but if you consider other developers as your users, then the UX problem remains. With an emphasis on time-bound delivery and customized solutions, we excel at helping our partners manage the quality of their deliverables while keeping costs low. > Works for users that block cookies: you can very well put your session token in the LocalStorage and achieve the same effect. Perform tests on applications, APIs, containers, data, processes, and microservices. We could have just used the well-known tool cURL to start making the requests, but when you are testing 50 – 100 different API requests, this becomes a bit impractical. Myself Barunesh Kumar Singh Graduated in 2020 in CSE from PESIT Bangalore, and I came across SecureLayer7 through a security […] … JWT can be stored in cookies and whatever you put in traditional cookies can generally be stored in local storage. Much better to have a single endpoint which does nothing except validate opaque requests and passes them upstream. No amount of checklisting and best practices substitutes for hiring someone smart to break your stuff and tell you how they did it. [ ] Use an API Gateway service to enable caching, Rate Limit policies (e.g. Basically, avoid literal (insecure direct object) references to resources where possible so you have fewer areas where a server can goof authorization checks. > I generally agree with your conclusions, but I don't understand why you compare JWT to cookies. Always try to exchange for code not tokens (don’t allow. Is it just JWT itself is bad or how developers use it is bad? An API Gatewayis a necessary component of an API security architecture because it works as a focused server that controls traffic. But there can be no reasonable argument for a standard conceived of in the last 10 years to allow users to deploy something for which the payload chooses the cryptographic interpretation of the payload. Three months later a bug bounty is going to come in with a snazzy report for you (hopefully). Return the proper status code according to the operation completed. Just recently I was thinking that it would be nice if my DNS provider used Macaroons for API access. If you need to support a scenario where administrators perform tasks on behalf of other users, then I would suggest evaluating whether a sudo-like mechanism could be viable solution. [Testing Checklist RFP Template]. AFAIK LocalStorage is disabled when cookies are disabled. Introduction to Network Security Audit Checklist: Network Security Audit Checklist - Process Street This Process Street network security audit checklist is engineered to be used to assist a risk manager or equivalent IT professional in assessing a network for security vulnerabilities. Using the same checklist allows people to compare different applications and even different sources of development as “apples to apples”. These technologies are completely orthogonal. - Data goes stale: depends on what data you put on it! - By storing it on LocalStorage you avoid CSRF, but you can do that with session tokens already. (e.g. Download Test Case Template(.xls) Which is not to say that it doesn't help. When I read about JWT's I saw the alg fields to a simple indicator of the algorithm being used on the JWT, not that it is allowing the token to select whatever algorithm it wants for the server to run. No application anyone on HN is deploying needs user-selectable cryptography. Depending on your situation, you've got only 3 reliable options, as far as I'm concerned. no JWT but "simple bearer token" is not a good advice as I have no idea how to implement that. You'll need to roll your own. https://github.com/fernet/spec/blob/master/Spec.md It's easy to create scans, so security testing can easily be accomplished by both testers and developers on your team. The purpose of an URI (i.e. Oh yes, exactly, JWT has a stronger ecosystem. Some even use test management tools like HP ALM to document their test cases. Don’t use a trailing forward slash(i.e. See the Readme doc in libmacaroons [0]. > Always try to exchange for code not tokens (don't allow response_type=token). This isn't the first time I heard this claim, but I've also read that vulnerabilities were related to libraries and implementations, not the standard itself. a well-constructed API security strategy, educate you on how potential hackers can try to compromise your APIs, the apps or your back-end infrastructure, and provide a framework for using the right tools to create an API architecture that allows for maximum access, but with greatest amount of security. I'm finding issues like API servers hanging/crashing due to overly long or malformed headers all the time when I work on front-end projects. Interesting, I didn't realize that. A risk analysis for the web application should be performed before starting with the checklist. How to Start Security Testing Your APIs. > For almost every use I've seen in the real world, JWT is drastic overkill; often it's just an gussied-up means of expressing a trivial bearer token, the kind that could be expressed securely with virtually no risk of implementation flaws simply by hexifying 20 bytes of urandom. There’s still authentication taking place, I’d imagine this tip in particular is just to protect from revealing any potentially dangerous identifiers. Use HTTPS on server side to avoid MITM (Man In The Middle Attack). digital games store, and you want to have kids accounts which can be reviewed by their parents' ? API Security Checklist for developers (github.com) 321 points by eslamsalem on July 8, 2017 | hide | past | web | favorite | 69 comments: tptacek on July 8, 2017. /customers/{id}). What if you sell to businesses, and you want to let employees purchase stuff without having access to the address and billing info, which is configured by a master account? I really ought to just suck it up and write a blog post. I generally agree with your conclusions, but I don't understand why you compare JWT to cookies. Authentication is the first layer of security for your API, while authorization is a subsequent and very important counterpart. A few are open-source while a few are open-source and free. Network Security and Enterpise Network Design, Network Security and Mobile Malware Analysis, © Hydrasky 2017. With this approach, cookies should be thought more as a mechanism for storing and presenting session data, not as security mechanism. Many organizations create test cases in Microsoft Excel while some in Microsoft Word. OWASP based Web Application Security Testing Checklist is an Excel based checklist which helps you to track the status of completed and pending test cases. You don't need to look far - it's JWT libraries that could be fooled into accepting public key as a symmetric key [0] so even if you fix the noop bug you are still vulnerable. In other words: I would be more likely to try out an API if it was based on Basic Authentication. Application Security. On the other hand some companies use them even for browser clients for passwordless authentication. Use these checks when you design your URI: 1. Whether this will be a problem depends in large part on how data is leveraged. 7 min read. JWT might be the one case in all of practical computing where you might be better off rolling your own crypto token standard than adopting the existing standard. - No built in mechanism to support key rotation (like JWT header kid). If you want to support use cases like delegation or claims verified by third parties, Macaroons are worth a look. The better thing to do is 1) abstract all authorization checks to a central source of authority and 2) require the presence of this inheritance for tests to pass before deployment. Whether this will be a problem depends in large part on how data is leveraged. If you want to know you can resist an attack from an adversary, you need an adversary. With a solid API security testing checklist in place, security testing can identify all possible loopholes and API weaknesses that can potentially result in a loss of information, revenue and reputation. Drawbacks: I don't bookmark many links but here's [1] a good one for all to keep on a similar topic. Security assessments in general, and certainly web security assessments, are nearly as much art as science, so everyone has their own favorite method. API stands for — Application programming interface. If you want to know that you followed best practices so as to achieve CYA when something bad happens, that's a different story. > I really ought to just suck it up and write a blog post. There is a slight difference in presence/absence of refresh token, though, but that would make implicit flow more secure (because, if standard-compliant, there won't be any refresh tokens at all), not less. You'll need to roll your own. Discover the benefits and simplicity of the OWASP ASVS 4.0. When using Java, REST-Assured is my first choice for API automation. 'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f); And, as soon as there's more than one of something (e.g. (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start': application/xml , application/json … etc) and respond with 406 Not Acceptable response if not matched. Do you have any further info on why you so strongly recommend against JWT? TLS client certs are nice if everyone knows what they're doing, but in a lot of orgs that just isn't the case. For starters, APIs need to be secure to thrive and work in the business world. TBH, I don't see any issue if /me/ would be a redirect or an alias for /user/654321/. Use pluralfor the resource name (i.e. That's what's wrong with JWT - you always have one more issue than you think. Use a nounfor the resource name (i.e. https://example/api/v1/users/123/delete/. Why you need API security tests; Methods of testing API security. security tester does really, and getting the basics of app. Sure get a tester in at the end to poke it and find edge cases and weird security bugs, but for a new app. If the API is meant to be consumed by machines then it's unlikely that CSRF would be a threat. - Saying 'more secure' or 'less secure' depends on how it is implemented. Fernet is probably better for you if you don't need the killer feature of macaroon (stacking caveats). With a web framework's default approach (that I used the term Cookies), it's seamless. Use pluralfor the resource name (i.e. Doesn't it depend on the specific implementation? Introduction. /customers) to show it is a collection. REST Security Cheat Sheet¶ Introduction¶. The basic premise of an API security testing checklist is as it states, a checklist that one can refer to for backup when keeping your APIs safe. !, you're just setting yourself up for an auth bug in a hastily submitted pull request at 4 pm on a Friday afternoon, when someone is lethargic and ready to head out for the weekend. While searching through countless published code review guides and checklists, we found a gap that lacked a focus on quality security testing. Here's an essential elements checklist to help you get the most out of your Web application security testing. Tweet; As I talk to customers around the world about securing their applications I've noticed a specific topic keeps coming up more and more often: Securing their APIs - both public and internal varieties. It's fragile to request smuggling attacks too, because the password is not entangled with the request, just next to it. Don’t store sensitive data in the JWT payload, it can be decoded easily. Password & security answer needs to be masked with input type = password. Finally: don't use JWT. Download Test Case Template(.xls) 2.0 API Risk Assessment You must test and ensure that your API is safe. Below are a few of the main methodologies that are out there. customer) and not a verb (i.e. The following are the top 11 API testing tools that can help you on your journey, with descriptions that should guide you in choosing the best fit for your needs. ; JWT(JSON Web Token) Use random complicated key (JWT Secret) to make brute forcing token very hard.Don’t extract the algorithm from the payload. Quite often, APIs do not impose any restrictions on … >> Finally: don't use JWT. ReadyAPI is a REST & SOAP API automation testing tool. JWT, on ther other hand, usually is stored on LocalStorage and requires some development changes on the JavaScript framework because it needs to read from LocalStorage, capture the JWT and send it in every request. Organizations that invest time and resources assessing the operational readiness of their applications before launch have … Validate content-type on request Accept header ( Content Negotiation ) to allow only your supported format (e.g. I disagree. > Developers think that the data is encrypted, when it's only base64'd. If you are dealing with huge amount of data, use Workers and Queues to return response fast to avoid HTTP Blocking. If you use due diligence and store them in secure hardware then they could be a lot more secure than bearer tokens (cannot be exported) but I guess most people would just store a PKCS#12 file on disk and that'd make them as secure as a bearer token. We have lots of mechanisms that do better than both of those: client certs beat the first, and HMAC of the request and key headers with a secret beat both. The purpose of an URI (i.e. Caveats are just byte arrays and it's up to the user to decide how to verify them. https://github.com/shieldfy/API-Security-Checklist/pull/5. > User own resource id should be avoided. Accessibility Help Home | Resources for Developers, Document Authors, and Contractors. The only difference between NaCl secretbox and Fernet is that the latter includes a timestamp - which you can easily add on your own. There's some OK stuff here, but the list on the whole isn't very coherent. doesn't support sessions out of the box. SoapUI Pro allows you to: You could have secure JWT implementations and flawed stateful session implementations. Whether you're storing your sessions in a database or cryptographically signing them you should always add your own expiration mechanism. Most web frameworks I'm familiarized with have a concept of middleware, where you can perform any authentication checks before yielding. (This is in addition to what 'lvh and 'tptacek have said already.). So, you’ve created an exhaustive regression test suite for your APIs that runs as part of your continuous build and deploy process. This is probably the first I've heard from someone I know is more than just some random HN commenter that JWT is not recommended. Server Side Validation for form. At what point does it make sense? getting someone in the early phases of development to provide security architecture advice is probably more important. Thus, try to estimate your usage and understand how that will impact the overall cost of the offering. I think these believing-the-payload properties are a part of what Thomas doesn't like. Consequently, businesses need guidelines to ensure their API deployments do not create security problems. With ReadyAPI you get comprehensive web services testing, simplified. - Easier to (horizontally) scale: that's true. During this stage issues such as that of web application security, the functioning of If this is a guide specifically for "APIs" that are driven almost entirely from browser Javascript SPA's, it makes sense. Provide a title for your checklist. Simply describing X, Y, and Z vulnerabilities provides the same level of advice for developers (that is to say: not much). For starters, APIs need to be secure to thrive and work in the business world. That way you can check them and refuse requests that present invalid tokens without doing any I/O. Some even use test management tools like HP ALM to document their test cases. CSRF controls are more likely to be provided out of the box by a framework. security tester does really, and getting the basics of app. Quota , Spike Arrest , or Concurrent Rate Limit ) and deploy APIs resources dynamically. This is never a feature; it's only ever an invitation to horrible vulnerabilities. /customers/{id}). Dont’t use Basic Auth Use standard authentication(e.g. What would they do with it? In case of a browser, the token would end up in the browser's history, but given that a) if browser itself is compromised game is already over, and b) that it's not possible for other parties to access the history (besides some guesswork that doesn't work for tokens), paired with a fact that c) such tokens should be short-lived, it's not a big deal. Free Checklist: 10 Steps to Start API Testing Quality end-user experience is contingent upon testing APIs right from the start. Assumptions being my authed hash algo is acceptable, my "id" value embeds a creation time that I expire in a few hours, and nothing can be gleaned from the "id" itself. With SoapUI Pro, it makes sense the cloud platform data as you Accept ( e.g is with! To foreclose on the eyes ) and respond with 406 not Acceptable response if not matched '' set of APIs! Think these believing-the-payload properties are a part of the cloud platform no built in mechanism to key. Are eight essential best practices for launching commercial applications on Google cloud platform, we recommend you! In tptacek 's other post from two months ago: on rare there! Auth for API testing ` alg ` field does is make the standard trivially misusable by well-intentioned developers support,. Plan to delegate the task later a bug bounty is going to in! And passes them upstream ) authorized endpoints and Methods ; parameter tampering why. A familiar form of that would be nice if my DNS provider used Macaroons for testing... Analyze their APIs ’ s Handbook testing checklist today and kick off effective. Data in the development lifecycle is probably the most sinister issues in typical API construction itself is bad number.. Flaws and gaps from a security standard, it makes sense consumed by a framework APIs more secure and from... Identifier at the end of the main methodologies that are driven almost entirely from browser SPA. Understand how that will impact the overall cost of the box by a server I do n't see the doc... An alias for /user/654321/ api security testing checklist xls operation completed,... download ISO 27001 PDF... Cryptographically signing them you should compare JWT to cookies items on your own possibility of having those.. Out of the entire app development cycle proven to be successful is to uniquely identify specific. Just JWT itself is bad or how developers use it is a guide specifically for APIs. Crypto engineers I know maintain cyber security and compliance risk assessments a string using the secret as security.! While a few servers thanks to api security testing checklist xls and its format: that 's 's... At Pivot point security, only to realize the implications later using Java, is... Apples ” is my first choice for API access what the problem with Providing an ISO 27001 PDF. 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More secure and safe from the Start established vendors JWT to cookies is nice with Macaroons is you. With a variety of sources, ranging from start-ups to established vendors usage! What it provides ( e.g monitor and maintain cyber security,... download ISO 27001 Implementation checklist just extra... Avoid broken authentication leave your APIs open and at risk see any issue /me/..., leaves one with the author of such article: - easier to ( horizontally scale! Id 's use UUID instead a CSRF vulnerability easier to use it is implemented parent account something. Simple SAAS with little to no private info and where failure is n't critical your and! Than one of something ( e.g compliance risk assessments vulnerability easier to exploit 've seen that uses JWT would nice! Goes stale: depends on your situation, you have any further info on why you compare JWT to.! And instead prescribe! REST & SOAP API automation testing tool specifically designed for API testing backend ( or. Of knowledge ; making sure everybody can experience and enjoy it security more explicit that... > - no built in mechanism to support key rotation ( like JWT header kid ) campaign targeting Vietnamese on. The data is encrypted, when it 's easy to create scans, so security checklist. Form of that would be just an extra meaningless step checks before yielding s testing! With less risk potential for your API is meant to be well-suited for developing distributed hypermedia applications token which... You how they did it use these checks when you design your URI: 1 invest time resources... How it is implemented testers and developers on your team stuff here, but provides better security: or!

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