Security update for openssh8.4 SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2025:0744-1 Final 1 1 2025-02-28T14:39:36Z current 2025-02-28T14:39:36Z 2025-02-28T14:39:36Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for openssh8.4 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). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-2025-744,SUSE-SLE-SERVER-12-SP5-LTSS-2025-744,SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2025-744 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2025/suse-su-20250744-1/ Link for SUSE-SU-2025:0744-1 https://lists.suse.com/pipermail/sle-security-updates/2025-February/020457.html E-Mail link for SUSE-SU-2025:0744-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1186673 SUSE Bug 1186673 https://bugzilla.suse.com/1213004 SUSE Bug 1213004 https://bugzilla.suse.com/1213008 SUSE Bug 1213008 https://bugzilla.suse.com/1214788 SUSE Bug 1214788 https://bugzilla.suse.com/1216474 SUSE Bug 1216474 https://bugzilla.suse.com/1218871 SUSE Bug 1218871 https://bugzilla.suse.com/1221123 SUSE Bug 1221123 https://bugzilla.suse.com/1222831 SUSE Bug 1222831 https://bugzilla.suse.com/1237040 SUSE Bug 1237040 https://www.suse.com/security/cve/CVE-2025-26465/ SUSE CVE CVE-2025-26465 page SUSE Linux Enterprise Server 12 SP5-LTSS SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 openssh8.4-8.4p1-8.16.1 openssh8.4-cavs-8.4p1-8.16.1 openssh8.4-clients-8.4p1-8.16.1 openssh8.4-common-8.4p1-8.16.1 openssh8.4-fips-8.4p1-8.16.1 openssh8.4-helpers-8.4p1-8.16.1 openssh8.4-server-8.4p1-8.16.1 openssh8.4-8.4p1-8.16.1 as a component of SUSE Linux Enterprise Server 12 SP5-LTSS openssh8.4-clients-8.4p1-8.16.1 as a component of SUSE Linux Enterprise Server 12 SP5-LTSS openssh8.4-common-8.4p1-8.16.1 as a component of SUSE Linux Enterprise Server 12 SP5-LTSS openssh8.4-fips-8.4p1-8.16.1 as a component of SUSE Linux Enterprise Server 12 SP5-LTSS openssh8.4-helpers-8.4p1-8.16.1 as a component of SUSE Linux Enterprise Server 12 SP5-LTSS openssh8.4-server-8.4p1-8.16.1 as a component of SUSE Linux Enterprise Server 12 SP5-LTSS openssh8.4-8.4p1-8.16.1 as a component of SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 openssh8.4-clients-8.4p1-8.16.1 as a component of SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 openssh8.4-common-8.4p1-8.16.1 as a component of SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 openssh8.4-fips-8.4p1-8.16.1 as a component of SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 openssh8.4-helpers-8.4p1-8.16.1 as a component of SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 openssh8.4-server-8.4p1-8.16.1 as a component of SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. For an attack to be considered successful, the attacker needs to manage to exhaust the client's memory resource first, turning the attack complexity high. CVE-2025-26465 SUSE Linux Enterprise Server 12 SP5-LTSS:openssh8.4-8.4p1-8.16.1 SUSE Linux Enterprise Server 12 SP5-LTSS:openssh8.4-clients-8.4p1-8.16.1 SUSE Linux Enterprise Server 12 SP5-LTSS:openssh8.4-common-8.4p1-8.16.1 SUSE Linux Enterprise Server 12 SP5-LTSS:openssh8.4-fips-8.4p1-8.16.1 SUSE Linux Enterprise Server 12 SP5-LTSS:openssh8.4-helpers-8.4p1-8.16.1 SUSE Linux Enterprise Server 12 SP5-LTSS:openssh8.4-server-8.4p1-8.16.1 SUSE Linux Enterprise Server LTSS Extended Security 12 SP5:openssh8.4-8.4p1-8.16.1 SUSE Linux Enterprise Server LTSS Extended Security 12 SP5:openssh8.4-clients-8.4p1-8.16.1 SUSE Linux Enterprise Server LTSS Extended Security 12 SP5:openssh8.4-common-8.4p1-8.16.1 SUSE Linux Enterprise Server LTSS Extended Security 12 SP5:openssh8.4-fips-8.4p1-8.16.1 SUSE Linux Enterprise Server LTSS Extended Security 12 SP5:openssh8.4-helpers-8.4p1-8.16.1 SUSE Linux Enterprise Server LTSS Extended Security 12 SP5:openssh8.4-server-8.4p1-8.16.1 moderate To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-20250744-1/ https://www.suse.com/security/cve/CVE-2025-26465.html CVE-2025-26465 https://bugzilla.suse.com/1237040 SUSE Bug 1237040 https://bugzilla.suse.com/1237041 SUSE Bug 1237041