suse-su-2025:20160-1
Vulnerability from csaf_suse
Published
2025-03-25 09:02
Modified
2025-03-25 09:02
Summary
Security update for openssh

Notes

Title of the patch
Security update for openssh
Description of the patch
This update for openssh fixes the following issues: - CVE-2025-26465: Fixed MitM attack against OpenSSH's VerifyHostKeyDNS-enabled client (bsc#1237040). - CVE-2025-26466: Fixed DoS attack against OpenSSH's client and server (bsc#1237041). Other bugfixes: - Fix ssh client segfault with GSSAPIKeyExchange=yes in ssh_kex2 due to gssapi proposal not being correctly initialized (bsc#1236826). - Add #include <stdlib.h> in some files added by the ldap patch to fix build with gcc14 (bsc#1225904). - Added missing struct initializer, added missing parameter (bsc#1222840). - Remove OPENSSL_HAVE_EVPGCM-ifdef, which is no longer supported by upstream (bsc#1221928). - Use %config(noreplace) for sshd_config. In any case, it's recommended to drop a file in sshd_config.d instead of editing sshd_config (bsc#1221063). - Add a patch to fix a regression introduced in 9.6 that makes X11 forwarding very slow (bsc#1229449). - Drop keycat binary that is not supported, except of the code that is used by other SELinux patches (bsc#1229072). - Fix RFC4256 implementation that keyboard-interactive authentication method can send instructions and sshd shows them to users (bsc#1229010). - Add attempts to mitigate instances of secrets lingering in memory after a session exits (bsc#1186673, bsc#1213004, bsc#1213008). - Remove empty line at the end of sshd-sle.pamd (bsc#1227456)
Patchnames
SUSE-SLE-Micro-6.0-259
Terms of use
CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).


To clipboard 

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  "vulnerabilities": [
    {
      "cve": "CVE-2025-26465",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2025-26465"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "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\u0027s memory resource first, turning the attack complexity high.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Micro 6.0:openssh-9.6p1-3.1.aarch64",
          "SUSE Linux Micro 6.0:openssh-9.6p1-3.1.s390x",
          "SUSE Linux Micro 6.0:openssh-9.6p1-3.1.x86_64",
          "SUSE Linux Micro 6.0:openssh-clients-9.6p1-3.1.aarch64",
          "SUSE Linux Micro 6.0:openssh-clients-9.6p1-3.1.s390x",
          "SUSE Linux Micro 6.0:openssh-clients-9.6p1-3.1.x86_64",
          "SUSE Linux Micro 6.0:openssh-common-9.6p1-3.1.aarch64",
          "SUSE Linux Micro 6.0:openssh-common-9.6p1-3.1.s390x",
          "SUSE Linux Micro 6.0:openssh-common-9.6p1-3.1.x86_64",
          "SUSE Linux Micro 6.0:openssh-fips-9.6p1-3.1.aarch64",
          "SUSE Linux Micro 6.0:openssh-fips-9.6p1-3.1.s390x",
          "SUSE Linux Micro 6.0:openssh-fips-9.6p1-3.1.x86_64",
          "SUSE Linux Micro 6.0:openssh-server-9.6p1-3.1.aarch64",
          "SUSE Linux Micro 6.0:openssh-server-9.6p1-3.1.s390x",
          "SUSE Linux Micro 6.0:openssh-server-9.6p1-3.1.x86_64",
          "SUSE Linux Micro 6.0:openssh-server-config-rootlogin-9.6p1-3.1.aarch64",
          "SUSE Linux Micro 6.0:openssh-server-config-rootlogin-9.6p1-3.1.s390x",
          "SUSE Linux Micro 6.0:openssh-server-config-rootlogin-9.6p1-3.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2025-26465",
          "url": "https://www.suse.com/security/cve/CVE-2025-26465"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1237040 for CVE-2025-26465",
          "url": "https://bugzilla.suse.com/1237040"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1237041 for CVE-2025-26465",
          "url": "https://bugzilla.suse.com/1237041"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.0:openssh-9.6p1-3.1.aarch64",
            "SUSE Linux Micro 6.0:openssh-9.6p1-3.1.s390x",
            "SUSE Linux Micro 6.0:openssh-9.6p1-3.1.x86_64",
            "SUSE Linux Micro 6.0:openssh-clients-9.6p1-3.1.aarch64",
            "SUSE Linux Micro 6.0:openssh-clients-9.6p1-3.1.s390x",
            "SUSE Linux Micro 6.0:openssh-clients-9.6p1-3.1.x86_64",
            "SUSE Linux Micro 6.0:openssh-common-9.6p1-3.1.aarch64",
            "SUSE Linux Micro 6.0:openssh-common-9.6p1-3.1.s390x",
            "SUSE Linux Micro 6.0:openssh-common-9.6p1-3.1.x86_64",
            "SUSE Linux Micro 6.0:openssh-fips-9.6p1-3.1.aarch64",
            "SUSE Linux Micro 6.0:openssh-fips-9.6p1-3.1.s390x",
            "SUSE Linux Micro 6.0:openssh-fips-9.6p1-3.1.x86_64",
            "SUSE Linux Micro 6.0:openssh-server-9.6p1-3.1.aarch64",
            "SUSE Linux Micro 6.0:openssh-server-9.6p1-3.1.s390x",
            "SUSE Linux Micro 6.0:openssh-server-9.6p1-3.1.x86_64",
            "SUSE Linux Micro 6.0:openssh-server-config-rootlogin-9.6p1-3.1.aarch64",
            "SUSE Linux Micro 6.0:openssh-server-config-rootlogin-9.6p1-3.1.s390x",
            "SUSE Linux Micro 6.0:openssh-server-config-rootlogin-9.6p1-3.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.8,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
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            "SUSE Linux Micro 6.0:openssh-9.6p1-3.1.s390x",
            "SUSE Linux Micro 6.0:openssh-9.6p1-3.1.x86_64",
            "SUSE Linux Micro 6.0:openssh-clients-9.6p1-3.1.aarch64",
            "SUSE Linux Micro 6.0:openssh-clients-9.6p1-3.1.s390x",
            "SUSE Linux Micro 6.0:openssh-clients-9.6p1-3.1.x86_64",
            "SUSE Linux Micro 6.0:openssh-common-9.6p1-3.1.aarch64",
            "SUSE Linux Micro 6.0:openssh-common-9.6p1-3.1.s390x",
            "SUSE Linux Micro 6.0:openssh-common-9.6p1-3.1.x86_64",
            "SUSE Linux Micro 6.0:openssh-fips-9.6p1-3.1.aarch64",
            "SUSE Linux Micro 6.0:openssh-fips-9.6p1-3.1.s390x",
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            "SUSE Linux Micro 6.0:openssh-server-9.6p1-3.1.s390x",
            "SUSE Linux Micro 6.0:openssh-server-9.6p1-3.1.x86_64",
            "SUSE Linux Micro 6.0:openssh-server-config-rootlogin-9.6p1-3.1.aarch64",
            "SUSE Linux Micro 6.0:openssh-server-config-rootlogin-9.6p1-3.1.s390x",
            "SUSE Linux Micro 6.0:openssh-server-config-rootlogin-9.6p1-3.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2025-03-25T09:02:20Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2025-26465"
    },
    {
      "cve": "CVE-2025-26466",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2025-26466"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "A flaw was found in the OpenSSH package. For each ping packet the SSH server receives, a pong packet is allocated in a memory buffer and stored in a queue of packages. It is only freed when the server/client key exchange has finished. A malicious client may keep sending such packages, leading to an uncontrolled increase in memory consumption on the server side. Consequently, the server may become unavailable, resulting in a denial of service attack.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Micro 6.0:openssh-9.6p1-3.1.aarch64",
          "SUSE Linux Micro 6.0:openssh-9.6p1-3.1.s390x",
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          "SUSE Linux Micro 6.0:openssh-clients-9.6p1-3.1.aarch64",
          "SUSE Linux Micro 6.0:openssh-clients-9.6p1-3.1.s390x",
          "SUSE Linux Micro 6.0:openssh-clients-9.6p1-3.1.x86_64",
          "SUSE Linux Micro 6.0:openssh-common-9.6p1-3.1.aarch64",
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          "SUSE Linux Micro 6.0:openssh-common-9.6p1-3.1.x86_64",
          "SUSE Linux Micro 6.0:openssh-fips-9.6p1-3.1.aarch64",
          "SUSE Linux Micro 6.0:openssh-fips-9.6p1-3.1.s390x",
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          "SUSE Linux Micro 6.0:openssh-server-9.6p1-3.1.aarch64",
          "SUSE Linux Micro 6.0:openssh-server-9.6p1-3.1.s390x",
          "SUSE Linux Micro 6.0:openssh-server-9.6p1-3.1.x86_64",
          "SUSE Linux Micro 6.0:openssh-server-config-rootlogin-9.6p1-3.1.aarch64",
          "SUSE Linux Micro 6.0:openssh-server-config-rootlogin-9.6p1-3.1.s390x",
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      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2025-26466",
          "url": "https://www.suse.com/security/cve/CVE-2025-26466"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1237041 for CVE-2025-26466",
          "url": "https://bugzilla.suse.com/1237041"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.0:openssh-9.6p1-3.1.aarch64",
            "SUSE Linux Micro 6.0:openssh-9.6p1-3.1.s390x",
            "SUSE Linux Micro 6.0:openssh-9.6p1-3.1.x86_64",
            "SUSE Linux Micro 6.0:openssh-clients-9.6p1-3.1.aarch64",
            "SUSE Linux Micro 6.0:openssh-clients-9.6p1-3.1.s390x",
            "SUSE Linux Micro 6.0:openssh-clients-9.6p1-3.1.x86_64",
            "SUSE Linux Micro 6.0:openssh-common-9.6p1-3.1.aarch64",
            "SUSE Linux Micro 6.0:openssh-common-9.6p1-3.1.s390x",
            "SUSE Linux Micro 6.0:openssh-common-9.6p1-3.1.x86_64",
            "SUSE Linux Micro 6.0:openssh-fips-9.6p1-3.1.aarch64",
            "SUSE Linux Micro 6.0:openssh-fips-9.6p1-3.1.s390x",
            "SUSE Linux Micro 6.0:openssh-fips-9.6p1-3.1.x86_64",
            "SUSE Linux Micro 6.0:openssh-server-9.6p1-3.1.aarch64",
            "SUSE Linux Micro 6.0:openssh-server-9.6p1-3.1.s390x",
            "SUSE Linux Micro 6.0:openssh-server-9.6p1-3.1.x86_64",
            "SUSE Linux Micro 6.0:openssh-server-config-rootlogin-9.6p1-3.1.aarch64",
            "SUSE Linux Micro 6.0:openssh-server-config-rootlogin-9.6p1-3.1.s390x",
            "SUSE Linux Micro 6.0:openssh-server-config-rootlogin-9.6p1-3.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.0:openssh-9.6p1-3.1.aarch64",
            "SUSE Linux Micro 6.0:openssh-9.6p1-3.1.s390x",
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            "SUSE Linux Micro 6.0:openssh-common-9.6p1-3.1.aarch64",
            "SUSE Linux Micro 6.0:openssh-common-9.6p1-3.1.s390x",
            "SUSE Linux Micro 6.0:openssh-common-9.6p1-3.1.x86_64",
            "SUSE Linux Micro 6.0:openssh-fips-9.6p1-3.1.aarch64",
            "SUSE Linux Micro 6.0:openssh-fips-9.6p1-3.1.s390x",
            "SUSE Linux Micro 6.0:openssh-fips-9.6p1-3.1.x86_64",
            "SUSE Linux Micro 6.0:openssh-server-9.6p1-3.1.aarch64",
            "SUSE Linux Micro 6.0:openssh-server-9.6p1-3.1.s390x",
            "SUSE Linux Micro 6.0:openssh-server-9.6p1-3.1.x86_64",
            "SUSE Linux Micro 6.0:openssh-server-config-rootlogin-9.6p1-3.1.aarch64",
            "SUSE Linux Micro 6.0:openssh-server-config-rootlogin-9.6p1-3.1.s390x",
            "SUSE Linux Micro 6.0:openssh-server-config-rootlogin-9.6p1-3.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2025-03-25T09:02:20Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2025-26466"
    }
  ]
}


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