CVE-2023-37464

HIGH

cisco/cjose < 0.6.2.2 - Use of a Broken Cryptographic Algorithm via Truncated Authentication Tag

Title source: llm
STIX 2.1

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).

References (9)

Core 9
Core References
Exploit, Patch, Vendor Advisory x_refsource_confirm
https://github.com/OpenIDC/cjose/security/advisories/GHSA-3rhg-3gf2-6xgj
Third Party Advisory x_refsource_misc
https://datatracker.ietf.org/doc/html/rfc7518#section-4.7

Scores

CVSS v3 8.6
EPSS 0.0060
EPSS Percentile 44.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-327
Status published
Products (1)
cisco/cjose < 0.6.2.2
Published Jul 14, 2023
Tracked Since Feb 18, 2026