CVEvulnerability

CVE-2021-32791

5.9 MEDIUM Published 2021-07-26 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-07-26
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.9 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 3.1 ([email protected])
5.9 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0 ([email protected])
4.3 MEDIUM — AV:N/AC:M/Au:N/C:P/I:N/A:N
Weaknesses
CWE-323, CWE-330

Description

mod_auth_openidc is an authentication/authorization module for the Apache 2.x HTTP server that functions as an OpenID Connect Relying Party, authenticating users against an OpenID Connect Provider. In mod_auth_openidc before version 2.4.9, the AES GCM encryption in mod_auth_openidc uses a static IV and AAD. It is important to fix because this creates a static nonce and since aes-gcm is a stream cipher, this can lead to known cryptographic issues, since the same key is being reused. From 2.4.9 onwards this has been patched to use dynamic values through usage of cjose AES encryption routines.

Affected configurations

• openidc mod auth openidc (< 2.4.9) • fedoraproject fedora 33 • fedoraproject fedora 34

Related

Weakness · CWE (2)

  • CWE-323 Reusing a Nonce, Key Pair in Encryption weakness
  • CWE-330 Use of Insufficiently Random Values weakness

References