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SUSE-SU-2025:0744-1

Опубликовано: 28 фев. 2025
Источник: suse-cvrf

Описание

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).

Список пакетов

SUSE Linux Enterprise Server 12 SP5-LTSS
openssh8.4-8.4p1-8.16.1
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
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5
openssh8.4-8.4p1-8.16.1
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

Ссылки

Описание

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.

Затронутые продукты
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
Ссылки