Description
LibJWT is a C JSON Web Token Library. Starting in version 3.0.0 and prior to version 3.3.0, the JWK parsing for RSA-PSS did not protect against a NULL value when expecting to parse JSON string values. A specially crafted JWK file could exploit this behavior by using integers in places where the code expected a string. This was fixed in v3.3.0. A workaround is available. Users importing keys through a JWK file should not do so from untrusted sources. Use the `jwk2key` tool to check for validity of a JWK file. Likewise, if possible, do not use JWK files with RSA-PSS keys.
Problem types
CWE-476: NULL Pointer Dereference
Product status
References
github.com/...libjwt/security/advisories/GHSA-ph96-hqpc-9f66
github.com/...ommit/cfd890286fa49ae61b534c937c9f0428b5c6034c