CVE-2025-23013 Auth bypass in pam-u2f
Local attackers can bypass authentication and escalate privileges in specific configurations of the Yubico PAM module.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-23013?
CVE-2025-23013 is a high-severity authentication bypass vulnerability in Yubico pam-u2f, published on 15 Jan 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In Yubico pam-u2f before 1.3.1, local privilege escalation can sometimes occur. This product implements a Pluggable Authentication Module (PAM) that can be deployed to support authentication using a YubiKey or other FIDO compliant authenticators on macOS or Linux. This software package has an issue that allows for an authentication bypass in some configurations. An attacker would require the ability to access the system as an unprivileged user. Depending on the configuration, the attacker may also need to know the user's password.
Weakness: CWE-394
Which versions are affected by CVE-2025-23013?
Linux distribution packages (24)
pam_u2f SUSE:Enterprise Storage 7.1 | All versions | 1.0.8-150000.3.6.1 |
pam_u2f SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | All versions | 1.0.8-150000.3.6.1 |
pam_u2f SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | All versions | 1.2.0-150400.4.5.1 |
pam_u2f SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS | All versions | 1.2.0-150400.4.5.1 |
pam_u2f SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | All versions | 1.2.0-150400.4.5.1 |
pam_u2f SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS | All versions | 1.2.0-150400.4.5.1 |
pam_u2f SUSE:Linux Enterprise Micro 5.3 | All versions | 1.2.0-150400.4.5.1 |
pam_u2f SUSE:Linux Enterprise Micro 5.4 | All versions | 1.2.0-150400.4.5.1 |
pam_u2f SUSE:Linux Enterprise Micro 5.5 | All versions | 1.2.0-150400.4.5.1 |
pam_u2f SUSE:Linux Enterprise Module for Basesystem 15 SP6 | All versions | 1.2.0-150600.10.5.1 |
pam_u2f SUSE:Linux Enterprise Server 12 SP5-LTSS | All versions | 1.0.8-3.6.1 |
pam_u2f SUSE:Linux Enterprise Server 15 SP3-LTSS | All versions | 1.0.8-150000.3.6.1 |
pam_u2f SUSE:Linux Enterprise Server 15 SP4-LTSS | All versions | 1.2.0-150400.4.5.1 |
pam_u2f SUSE:Linux Enterprise Server 15 SP5-LTSS | All versions | 1.2.0-150400.4.5.1 |
pam_u2f SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 | All versions | 1.0.8-3.6.1 |
pam_u2f SUSE:Linux Enterprise Server for SAP Applications 15 SP3 | All versions | 1.0.8-150000.3.6.1 |
pam_u2f SUSE:Linux Enterprise Server for SAP Applications 15 SP4 | All versions | 1.2.0-150400.4.5.1 |
pam_u2f SUSE:Linux Enterprise Server for SAP Applications 15 SP5 | All versions | 1.2.0-150400.4.5.1 |
pam_u2f SUSE:Linux Micro 6.0 | All versions | 1.3.2-1.1 |
pam_u2f SUSE:Linux Micro 6.1 | All versions | 1.3.0-slfo.1.1_2.1 |
pam_u2f SUSE:Manager Proxy 4.3 | All versions | 1.2.0-150400.4.5.1 |
pam_u2f SUSE:Manager Server 4.3 | All versions | 1.2.0-150400.4.5.1 |
pam_u2f openSUSE:Leap 15.6 | All versions | 1.2.0-150600.10.5.1 |
pam_u2f openSUSE:Tumbleweed | All versions | 1.3.1-1.1 |
How do I fix CVE-2025-23013?
Upgrade to a fixed version.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2025-23013 being exploited?
There is no known exploitation of CVE-2025-23013 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2025-23013, DLA-4040-1, DSA-5853-1, GHSA-wwr4-cj7g-985f, SUSE-SU-2025:0167-1, SUSE-SU-2025:0192-1 and 7 more.