CVE-2025-23013

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 Type (CWE)

CWE-394 CWE-394

References

Other References

https://www.yubico.com/support/security-advisories/ysa-2025-01/ http://www.openwall.com/lists/oss-security/2025/01/15/1 http://www.openwall.com/lists/oss-security/2025/01/16/2 http://www.openwall.com/lists/oss-security/2025/01/16/3 http://www.openwall.com/lists/oss-security/2025/01/16/4 http://www.openwall.com/lists/oss-security/2025/01/16/5 https://lists.debian.org/debian-lts-announce/2025/02/msg00001.html

Frequently Asked Questions

What is CVE-2025-23013? +

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.

How do I check if I'm vulnerable to CVE-2025-23013? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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