CVSS: 7.5EPSS: 0%CPEs: 3EXPL: 0CVE-2022-29217 – Key confusion through non-blocklisted public key formats in PyJWT
https://notcve.org/view.php?id=CVE-2022-29217
24 May 2022 — PyJWT is a Python implementation of RFC 7519. PyJWT supports multiple different JWT signing algorithms. With JWT, an attacker submitting the JWT token can choose the used signing algorithm. The PyJWT library requires that the application chooses what algorithms are supported. The application can specify `jwt.algorithms.get_default_algorithms()` to get support for all algorithms, or specify a single algorithm. • https://github.com/jpadilla/pyjwt/commit/9c528670c455b8d948aff95ed50e22940d1ad3fc • CWE-327: Use of a Broken or Risky Cryptographic Algorithm •
CVSS: 7.5EPSS: 1%CPEs: 3EXPL: 0CVE-2017-11424
https://notcve.org/view.php?id=CVE-2017-11424
24 Aug 2017 — In PyJWT 1.5.0 and below the `invalid_strings` check in `HMACAlgorithm.prepare_key` does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string `-----BEGIN RSA PUBLIC KEY-----` which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch. En PyJWT 1.5.0 y anteriores, la comprobación `inv... • http://www.debian.org/security/2017/dsa-3979 •