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Fencer Vulns
high 7.3

CVE-2025-23013 json

In Yubico pam-u2f before 1.3.1, local privilege escalation can sometimes occur.

published 2025-01-15 21 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-3074

cvss
7.3
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 35%
public exploits
0
none known

Summary

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.

Patch / fix

  • Yubico pam-u2f 1.3.1
  • pam-u2f Debian 12 1.1.0-1.1+deb12u1
  • pam-u2f Debian 14, Debian 13 1.3.1-1

debian advisories DEBIAN-CVE-2025-23013

  • pam-u2f Ubuntu 22.04 LTS 1.1.0-1.1+deb12u1build0.22.04.1
  • pam-u2f Ubuntu 24.04 LTS 1.1.0-1.1+deb12u1build0.24.04.1
  • pam-u2f Ubuntu Pro 20.04 LTS 1.0.8-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2025-23013

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • pam_u2f Linux Micro 6.1 1.3.0-slfo.1.1_2.1
  • pam_u2f Linux Micro 6.0 1.3.2-1.1
  • pam_u2f SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +10 more 1.2.0-150400.4.5.1
  • pam_u2f SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE High Performance Computing 15 SP3-LTSS +1 more 1.0.8-150000.3.6.1
  • pam_u2f SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 1.2.0-150600.10.5.1
  • pam_u2f SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 1.0.8-3.6.1

suse advisories SUSE-SU-2025:20231-1SUSE-SU-2025:20132-1SUSE-SU-2025:0200-1SUSE-SU-2025:0198-1SUSE-SU-2025:0192-1SUSE-SU-2025:0167-1

  • pam_u2f openSUSE Tumbleweed 1.3.1-1.1

opensuse advisories openSUSE-SU-2025:14650-1

  • pam-u2f Alpine 3.21, Alpine 3.20 1.3.2-r0
  • pam-u2f Alpine 3.24, Alpine 3.23, Alpine 3.22 1.3.1-r0

alpine advisories ALPINE-CVE-2025-23013

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-23013 updated cvss 7.2

pam-u2f: pam-u2f: Local privilege escalation and authentication bypass

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
21 mo ago

Exploit prediction

0.40% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 7.3 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
CNA 4.0 7.3 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • Yubico pam-u2f

Classification

Weakness
  • CWE-394 Unexpected Status Code or Return Value

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.