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CVE-2023-37464

Incorrect Authentication Tag length usage in AES GCM decryption in OpenIDC/cjose

Published: Jul 14, 2023Updated: Nov 21, 2024 Sources: CVE List NVDCWE-327
8.6HIGH
NVD MITRE
EPSS Score
0.7%
Top 50.2%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available
Self-Check
OpenVAS

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).

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:CC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-327

Affected Products

cisco
commercial·USaka cisco systems, cisco systems inc.
cjose
Networking Infrastructure
OpenIDC
oss-projectaka mod_auth_openidc, cjose, mod auth openidc
cjoseLibrary
OSS Libraries / generic-library

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Collection
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References

https://datatracker.ietf.org/doc/html/rfc7518#section-4.7
datatracker.ietf.org
https://github.com/OpenIDC/cjose/commit/7325e9a5e71e2fc0e350487ecac7d84acdf0ed5e
github.com
https://github.com/OpenIDC/cjose/releases/tag/v0.6.2.2
github.com
and 6 more references View all →

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