vulnerability
Ubuntu: (CVE-2021-32791): libapache2-mod-auth-openidc vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:N/AC:M/Au:N/C:P/I:N/A:N) | Jul 26, 2021 | Jun 26, 2025 | Mar 27, 2026 |
Severity
4
CVSS
(AV:N/AC:M/Au:N/C:P/I:N/A:N)
Published
Jul 26, 2021
Added
Jun 26, 2025
Modified
Mar 27, 2026
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.
Solution
no-fix-ubuntu-package
References
- CVE-2021-32791
- https://attackerkb.com/topics/CVE-2021-32791
- CWE-323
- CWE-330
- EUVD-EUVD-2021-19554
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-19554
- https://github.com/zmartzone/mod_auth_openidc/commit/375407c16c61a70b56fdbe13b0d2c8f11398e92c
- https://github.com/zmartzone/mod_auth_openidc/releases/tag/v2.4.9
- https://github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-px3c-6x7j-3r9r
- https://www.cve.org/CVERecord?id=CVE-2021-32791
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