Use of a Broken or Risky Cryptographic Algorithm Affecting mod_auth_openidc:2.3/cjose-devel package, versions <0:0.6.1-3.module+el8.4.0+19462+14bde120


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.2% (58th percentile)

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  • Snyk IDSNYK-RHEL8-MODAUTHOPENIDC-5815836
  • published18 Jul 2023
  • disclosed14 Jul 2023

Introduced: 14 Jul 2023

CVE-2023-37464  (opens in a new tab)
CWE-327  (opens in a new tab)

How to fix?

Upgrade RHEL:8 mod_auth_openidc:2.3/cjose-devel to version 0:0.6.1-3.module+el8.4.0+19462+14bde120 or higher.
This issue was patched in RHSA-2023:4409.

NVD Description

Note: Versions mentioned in the description apply only to the upstream mod_auth_openidc:2.3/cjose-devel package and not the mod_auth_openidc:2.3/cjose-devel package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

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).

CVSS Scores

version 3.1