Distribution advisory
This page covers CVE-2025-23013 as tracked by Ubuntu, for the package pam-u2f. The fix is available in version 1.1.0-1.1+deb12u1build0.24.04.1; earlier versions remain affected.
How this vulnerability can be exploited
This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. Rated impact: confidentiality high, integrity high, availability high.
CVSS metrics in full
The score comes from this vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- Attack vector: Local — a local account, shell or session on the host is needed.
- Attack complexity: Low — the attack works reliably, with no preparation.
- Attack requirements: Present — the target has to be in a particular state for the attack to work.
- Privileges required: Low — an ordinary user account is enough.
- User interaction: None — nobody has to be tricked into anything.
- Confidentiality impact: High — total loss, or loss the attacker controls.
- Integrity impact: High — total loss, or loss the attacker controls.
- Availability impact: High — total loss, or loss the attacker controls.
Weakness class
UBUNTU-CVE-2025-23013 is classified as CWE-394: Unexpected Status Code or Return Value. The product does not properly check when a function or operation returns a value that is legitimate for the function, but is not expected by the product.
Affected software
UBUNTU-CVE-2025-23013 is recorded against 1 package.
- pam-u2f (fixed in 1.1.0-1.1+deb12u1build0.24.04.1)
Timeline and source
Published on 15 January 2025 and last revised on 4 February 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.
References
ubuntu.com (Report)
www.cve.org (Report)
www.yubico.com (Report)
www.openwall.com (Report)
www.openwall.com (Report)
ubuntu.com (Advisory)
Other advisories for this package
pam-u2f has other advisories on record. If you are patching this one, these are worth checking on the same host:
Same weakness in other software
These advisories are the same class of weakness (CWE-394: Unexpected Status Code or Return Value) in other software:
