SUSE-SU-2025:02755-1: moderate: Security update for libssh

[SLE-UPDATES]

# Security update for libssh

Announcement ID: SUSE-SU-2025:02755-1  
Release Date: 2025-08-12T07:35:26Z  
Rating: moderate  
References:

  * bsc#1245309
  * bsc#1245310
  * bsc#1245311

  
Cross-References:

  * CVE-2025-4877
  * CVE-2025-4878
  * CVE-2025-5318

  
CVSS scores:

  * CVE-2025-4877 ( SUSE ):  2.0
    CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
  * CVE-2025-4877 ( SUSE ):  4.5 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
  * CVE-2025-4878 ( SUSE ):  2.0
    CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2025-4878 ( SUSE ):  3.6 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
  * CVE-2025-4878 ( NVD ):  3.6 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
  * CVE-2025-5318 ( SUSE ):  5.3
    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2025-5318 ( SUSE ):  5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
  * CVE-2025-5318 ( NVD ):  5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

  
Affected Products:

  * SUSE Linux Enterprise High Performance Computing 12 SP5
  * SUSE Linux Enterprise Server 12 SP5
  * SUSE Linux Enterprise Server 12 SP5 LTSS
  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security
  * SUSE Linux Enterprise Server for SAP Applications 12 SP5

  
  
An update that solves three vulnerabilities can now be installed.

## Description:

This update for libssh fixes the following issues:

  * CVE-2025-4877: Fixed write beyond bounds in binary to base64 conversion
    functions (bsc#1245309).
  * CVE-2025-4878: Fixed use of uninitialized variable in privatekey_from_file()
    (bsc#1245310).
  * CVE-2025-5318: Fixed likely read beyond bounds in sftp server handle
    management (bsc#1245311).

## 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 Enterprise Server 12 SP5 LTSS  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-2025-2755=1

  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2025-2755=1

## Package List:

  * SUSE Linux Enterprise Server 12 SP5 LTSS (aarch64 ppc64le s390x x86_64)
    * libssh-devel-doc-0.6.3-12.15.1
  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (x86_64)
    * libssh-devel-doc-0.6.3-12.15.1

## References:

  * https://www.suse.com/security/cve/CVE-2025-4877.html
  * https://www.suse.com/security/cve/CVE-2025-4878.html
  * https://www.suse.com/security/cve/CVE-2025-5318.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1245309
  * https://bugzilla.suse.com/show_bug.cgi?id=1245310
  * https://bugzilla.suse.com/show_bug.cgi?id=1245311

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