CVE-2023-37464 | BDVDB-2026-207385 Detail
OpenIDCcjose
Description#
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. Users unable to upgrade should avoid using AES GCM encryption and replace it with another encryption algorithm (e.g. AES CBC).
Impact#
Per CVSS v3.1: confidentiality impact none, integrity impact high, availability impact none. Attack vector: network.
Weaknesses#
- CWE-327 Use of a Broken or Risky Cryptographic Algorithm
References#
- https://github.com/OpenIDC/cjose/security/advisories/GHSA-3rhg-3gf2-6xgj
- https://github.com/OpenIDC/cjose/commit/7325e9a5e71e2fc0e350487ecac7d84acdf0ed5e
- https://datatracker.ietf.org/doc/html/rfc7518#section-4.7
- https://github.com/OpenIDC/cjose/releases/tag/v0.6.2.2
- https://lists.debian.org/debian-lts-announce/2023/08/msg00002.html
- https://www.debian.org/security/2023/dsa-5472
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DFWAPMYYVBO2U65HPYDTBEKNSXG4TP5C/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PTZHOVGY7AHGNMEY245HK4Q36AMA53AL/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LCQJXKDPCWCXB2V4JMQ3UWYJ4UIBPUW6/
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.