SUSE-SU-2025:20132-1: moderate: Security update for pam_u2f

[SLE-SECURITY-UPDATES]

# Security update for pam_u2f

Announcement ID: SUSE-SU-2025:20132-1  
Release Date: 2025-03-04T08:28:30Z  
Rating: moderate  
References:

  * bsc#1233517

  
Cross-References:

  * CVE-2025-23013

  
CVSS scores:

  * CVE-2025-23013 ( SUSE ):  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
  * CVE-2025-23013 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2025-23013 ( NVD ):  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:

  * SUSE Linux Micro 6.0

  
  
An update that solves one vulnerability can now be installed.

## Description:

This update for pam_u2f fixes the following issues:

  * update to 1.3.2:
  * Relax authfile permission check to a warning instead of an error to prevent
    a breaking change locking existing users out of their systems.

  * update to 1.3.1:

  * CVE-2025-23013: Fixed problematic PAM_IGNORE return values in
    `pam_sm_authenticate()`(bsc#1233517).
  * Changed return value when nouserok is enabled and the user has no
    credentials, PAM_IGNORE is used instead of PAM_SUCCESS.
  * Hardened checks of authfile permissions.
  * Hardened checks for nouserok.
  * Improved debug messages.
  * Improved documentation.

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * SUSE Linux Micro 6.0  
    zypper in -t patch SUSE-SLE-Micro-6.0-221=1

## Package List:

  * SUSE Linux Micro 6.0 (aarch64 s390x x86_64)
    * pam_u2f-1.3.2-1.1
    * pam_u2f-debugsource-1.3.2-1.1
    * pam_u2f-debuginfo-1.3.2-1.1

## References:

  * https://www.suse.com/security/cve/CVE-2025-23013.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1233517

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