CVE-2023-37464 – Incorrect Authentication Tag length usage in AES GCM decryption in OpenIDC/cjose

https://notcve.org/view.php?id=CVE-2023-37464

OpenIDC/cjose is a C library implementing the Javascript Object Signing and Encryption (JOSE). The AES GCM decryption routine incorrectly uses the Tag length from the actual Authentication Tag provided in the JWE. The spec says that a fixed length of 16 octets must be applied. Therefore this bug allows an attacker to provide a truncated Authentication Tag and to modify the JWE accordingly. Users should upgrade to a version >= 0.6.2.2. • https://datatracker.ietf.org/doc/html/rfc7518#section-4.7 https://github.com/OpenIDC/cjose/commit/7325e9a5e71e2fc0e350487ecac7d84acdf0ed5e https://github.com/OpenIDC/cjose/releases/tag/v0.6.2.2 https://github.com/OpenIDC/cjose/security/advisories/GHSA-3rhg-3gf2-6xgj https://lists.debian.org/debian-lts-announce/2023/08/msg00002.html https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DFWAPMYYVBO2U65HPYDTBEKNSXG4TP5C https://lists.fedoraproject.org/archives/list/package-annou • CWE-327: Use of a Broken or Risky Cryptographic Algorithm •