JWT Injection

JWT Attacks (JSON Web Token)

• JWT Authentication bypass via unverified signatures | we can directly change the contents from the JSON editor extension and make possible changes to manipulate the requests

• JWT Authentication bypass via none signature | setting the encryption type to none and removing the signature part of the JWT by just leaving the trailing dot

• JWT authentication bypass by weak signing key | we can use hashcat with default wordlists present in wordlists section

• JWT Header Injection | Using own RSA keys generated by the JSON Editor Extension

• JKU header injection attack | creating the RSA key —> copy as jwk and paste it to exploit serve and sign the same in the request

• JWT attack via path Traversal | Generate Symmetric key and set key= null and add the directory traversal path in the kid parameter

• check for the endpoint /jwks.json and make aa RSA key from the same keysets and then copy that public key as PEM and bas64 encode it and the generate a symmetric key with k parameter with generated key string and sign the request ..