#VU79694 Use of insufficiently random values in mod_auth_openidc - CVE-2021-32791
Published: August 18, 2023
Vulnerability identifier: #VU79694
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-32791
CWE-ID: CWE-330
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
mod_auth_openidc
mod_auth_openidc
Software vendor:
ZmartZone IAM
ZmartZone IAM
Description
The vulnerability allows a remote attacker to perform a brute-force attack.
The vulnerability exists due to the AES GCM encryption in mod_auth_openidc uses a static IV and AAD, which creates a static nonce. Since aes-gcm is a stream cipher, this can lead to known cryptographic issues as the same key is being reused.
Remediation
Install updates from vendor's website.
External links
- https://github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-px3c-6x7j-3r9r
- https://github.com/zmartzone/mod_auth_openidc/commit/375407c16c61a70b56fdbe13b0d2c8f11398e92c
- https://github.com/zmartzone/mod_auth_openidc/releases/tag/v2.4.9
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QXAWKPT5LXZSUTFSJ6IWSZC7RMYYQXQD/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FZVF6BSJLRQZ7PFFR4X5JSU6KUJYNOCU/
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://lists.debian.org/debian-lts-announce/2023/04/msg00034.html