This is a playground to test code. Use Git or checkout with SVN using the web URL. During a client engagement last year, I discovered a JSON Web Token (JWT) validation bypass issue in Auth0's Authentication API. https://insomnia.rest/download. var insomniaPluginJwtdecode = require("insomnia-plugin-jwtdecode"), RunKit is a free, in-browser JavaScript dev environment, https://npmjs.com/package/insomnia-plugin-jwtdecode. The Authentication API prevented the use of alg: none with a case sensitive filter. Authentication Basics. JWT (JSON Web Token) decoder for Insomnia REST Client. Insomnia is a cross-platform REST client, built on top of Electron. Plug-ins/Extensions. download the GitHub extension for Visual Studio. Add the JSON Web Token Creator template tag wherever you see fit and fill the necessary fields. Nothing beats some killer docs. Other Auth0 APIs - such as the Management API - were reviewed for the same vulnerability but were found to not be vulnerable. github.com/SiebeSysmans/insomnia-plugin-jwtdecode#readme, Gitgithub.com/SiebeSysmans/insomnia-plugin-jwtdecode, github.com/SiebeSysmans/insomnia-plugin-jwtdecode. We came to conclusion it was definitely the capitalisation of characters in the word 'none' that allowed the signature checking to be bypassed. You signed in with another tab or window. An example request containing a mfa_token in the response is provided below: Using a forged token, an attacker could associate a new TOTP MFA device that they control with the victim's account. The following outlines how I found the vulnerability that led to our advisory. In these scenarios, the none algorithm is specified in the JWT header. This plugin probably is the most convenient way to do JWT Authentication in WordPress. There are a number of great write-ups on attacking JWTs. Bugs and Feature Requests. This is a plugin for Insomnia that allows the creation of JSON Web Tokens.. Instalation. With the added complexity of authentication, comes an increased likelihood of something in the chain being misconfigured and introducing security vulnerabilities. Learn more. MFA bypass was slightly more interesting as several steps were required. Learn more, We use analytics cookies to understand how you use our websites so we can make them better, e.g. Insomnia is available for Mac, Windows, and popular Linux distributions. The Authentication API did not adequately validate a userâs JWT, allowing an attacker to forge a JWT for any user by creating a JWT with an algorithm of none and no signature. This repository is structured as a monorepo and contains many Node.JS packages. Download. Install the insomnia-plugin-jwtcreator plugin from Preferences > Plugins. JWT (JSON Web Token) decoder for Insomnia REST Client. Install the insomnia-plugin-jwtcreator plugin from Preferences > Plugins.. Usage. An example request showing the forged token being used to associate a new MFA device is provided below: Now the attacker has the two factors required to successfully authenticate - credentials and an MFA second factor device. Initial Dev Setup. If nothing happens, download the GitHub extension for Visual Studio and try again. Plugins. Simply choose your standard, fill in some details, and Insomnia will take care of the hard work for you. Auth0's Authentication API is reasonably limited in functionality, likely by design to limit the attack surface of the API. If nothing happens, download GitHub Desktop and try again. An example request showing successful authentication with an attacker-controlled TOTP MFA device is provided below: Read the complete advisory on our website. We use essential cookies to perform essential website functions, e.g. Thanks to the JSON Web Token Attacker (JOSEPH) Burp Suite plugin, working with JWTs is relatively straightforward, as they're just base64 encoded JSON. The Authentication API includes all the pieces required to manage MFA of a user's account, such as the enrolling and activating of new MFA devices. It was considered likely a large number of applications were vulnerable at the time of discovery. Paw seems to emphasize the use of plug-ins and user-created extensions. This is apparent when viewing the table on their Authentication support in a previous section. If nothing happens, download GitHub Desktop and try again. This plugin is not for encoding,constructing,validating, ... or other usages besides decoding JWT tokens. There are directions to prompt you once you're there. Now, open the application and get ready to create your first HTTP request. The JWT_AUTH_CORS_ENABLE line activates CORs to enhance security. Learn more. After I noticed I was receiving 200 responses from the /userinfo endpoint with requests containing a forged token, I was left staring at my screen a bit dumbfounded. Discover and Install plugins from the Insomnia Plugin Hub. Auth0's public platform was quickly patched and they rolled out patches to their private platform over time. Ben discusses a JSON Web Token validation bypass issue disclosed to Auth0 in their Authentication API. they're used to gather information about the pages you visit and how many clicks you need to accomplish a task. This is a plugin for the Insomnia REST Client. Note: version 0.10.0 changed … However, we can add the JWT token as an environment variable and reference that. At the time of writing (Insomnia 6.0.2), it is not possible to reference the JWT token from a body attribute of another request directly in the JWT Decode plugin. In both scenarios, the attacker would need to know the victim user's Auth0 userid, which some applications may disclose. What other functionality does the Authentication API have? At the time of writing (Insomnia 6.0.2), it is not possible to reference the JWT token from a body attribute of another request directly in the JWT Decode plugin.
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