Security update for openssh8.4

Announcement ID: SUSE-SU-2025:0744-1
Release Date: 2025-02-28T14:39:39Z
Rating: moderate
References:
Cross-References:
CVSS scores:
  • CVE-2025-26465 ( SUSE ): 6.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
  • CVE-2025-26465 ( NVD ): 6.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/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 one vulnerability and has eight security fixes can now be installed.

Description:

This update for openssh8.4 fixes the following issues:

  • CVE-2025-26465: Fixed a MitM attack against OpenSSH's VerifyHostKeyDNS-enabled client (bsc#1237040).

Other bugfixes:

  • Fix usage of local accelerator cards via openssl-ibmca (bsc#1216474, bsc#1218871).
  • Add patches from upstream to change the default value of UpdateHostKeys to Yes (unless VerifyHostKeyDNS is enabled) (bsc#1222831).
  • Fix hostbased ssh login failing occasionally with "signature unverified: incorrect signature" by fixing a typo in patch (bsc#1221123).
  • For now we don't ship the ssh-keycat command, but we need the patch for the other SELinux infrastructure (bsc#1214788).
  • Attempts to mitigate instances of secrets lingering in memory after a session exits (bsc#1213004, bsc#1213008, bsc#1186673).

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-2025-744=1
  • SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2025-744=1

Package List:

  • SUSE Linux Enterprise Server 12 SP5 LTSS (aarch64 ppc64le s390x x86_64)
    • openssh8.4-fips-8.4p1-8.16.1
    • openssh8.4-helpers-8.4p1-8.16.1
    • openssh8.4-server-8.4p1-8.16.1
    • openssh8.4-clients-debuginfo-8.4p1-8.16.1
    • openssh8.4-common-debuginfo-8.4p1-8.16.1
    • openssh8.4-helpers-debuginfo-8.4p1-8.16.1
    • openssh8.4-server-debuginfo-8.4p1-8.16.1
    • openssh8.4-8.4p1-8.16.1
    • openssh8.4-common-8.4p1-8.16.1
    • openssh8.4-clients-8.4p1-8.16.1
    • openssh8.4-debugsource-8.4p1-8.16.1
  • SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (x86_64)
    • openssh8.4-fips-8.4p1-8.16.1
    • openssh8.4-helpers-8.4p1-8.16.1
    • openssh8.4-server-8.4p1-8.16.1
    • openssh8.4-clients-debuginfo-8.4p1-8.16.1
    • openssh8.4-common-debuginfo-8.4p1-8.16.1
    • openssh8.4-helpers-debuginfo-8.4p1-8.16.1
    • openssh8.4-server-debuginfo-8.4p1-8.16.1
    • openssh8.4-8.4p1-8.16.1
    • openssh8.4-common-8.4p1-8.16.1
    • openssh8.4-clients-8.4p1-8.16.1
    • openssh8.4-debugsource-8.4p1-8.16.1

References: