SUSE-SU-2026:1344-1

Vulnerability from csaf_suse - Published: 2026-04-15 10:21 - Updated: 2026-04-15 10:21
Summary
Security update for libssh
Severity
Moderate
Notes
Title of the patch: Security update for libssh
Description of the patch: This update for libssh fixes the following issues: - CVE-2026-3731: denial of service via out-of-bounds read in SFTP extension name handler (bsc#1259377). - CVE-2026-0964: SCP protocol path traversal in `ssh_scp_pull_request()` (bsc#1258049). - CVE-2026-0965: possible denial of service when parsing unexpected configuration files (bsc#1258045). - CVE-2026-0966: buffer underflow in `ssh_get_hexa()` on invalid input (bsc#1258054). - CVE-2026-0967: specially crafted patterns could cause a denial of service (bsc#1258081). - CVE-2026-0968: out-of-bounds read in `sftp_parse_longname()` (bsc#1258080).
Patchnames: SUSE-2026-1344,SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-1344
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
CVE-2026-0964
5 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
Vendor Fix To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
CVE-2026-0965
3.3 (Low)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Vendor Fix To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
CVE-2026-0966
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Vendor Fix To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
CVE-2026-0967
2.2 (Low)
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L
Vendor Fix To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
CVE-2026-0968
3.7 (Low)
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:L
Vendor Fix To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
CVE-2026-3731
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Vendor Fix To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
References
To clipboard 

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          "text": "A malicious SCP server can send unexpected paths that could make the\nclient application override local files outside of working directory.\nThis could be misused to create malicious executable or configuration\nfiles and make the user execute them under specific consequences.\n\nThis is the same issue as in OpenSSH, tracked as CVE-2019-6111.",
          "title": "CVE description"
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      "ids": [
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          "text": "https://www.suse.com/security/cve/CVE-2026-0965"
        }
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          "text": "A flaw was found in libssh where it can attempt to open arbitrary files during configuration parsing. A local attacker can exploit this by providing a malicious configuration file or when the system is misconfigured. This vulnerability could lead to a Denial of Service (DoS) by causing the system to try and access dangerous files, such as block devices or large system files, which can disrupt normal operations.",
          "title": "CVE description"
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            "version": "3.1"
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          "details": "low"
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      "title": "CVE-2026-0965"
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          "text": "https://www.suse.com/security/cve/CVE-2026-0966"
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        {
          "category": "general",
          "text": "The API function `ssh_get_hexa()` is vulnerable, when 0-lenght\ninput is provided to this function. This function is used internally\nin `ssh_get_fingerprint_hash()` and `ssh_print_hexa()` (deprecated),\nwhich is vulnerable to the same input (length is provided by the\ncalling application).\n\nThe function is also used internally in the gssapi code for logging\nthe OIDs received by the server during GSSAPI authentication. This\ncould be triggered remotely, when the server allows GSSAPI authentication\nand logging verbosity is set at least to SSH_LOG_PACKET (3). This\ncould cause self-DoS of the per-connection daemon process.",
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        {
          "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 Enterprise Server LTSS Extended Security 12 SP5:libssh-devel-doc-0.6.3-12.28.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Enterprise Server LTSS Extended Security 12 SP5:libssh-devel-doc-0.6.3-12.28.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-04-15T10:21:31Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2026-0966"
    },
    {
      "cve": "CVE-2026-0967",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-0967"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "A flaw was found in libssh. A remote attacker, by controlling client configuration files or known_hosts files, could craft specific hostnames that when processed by the `match_pattern()` function can lead to inefficient regular expression backtracking. This can cause timeouts and resource exhaustion, resulting in a Denial of Service (DoS) for the client.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Enterprise Server LTSS Extended Security 12 SP5:libssh-devel-doc-0.6.3-12.28.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-0967",
          "url": "https://www.suse.com/security/cve/CVE-2026-0967"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1258081 for CVE-2026-0967",
          "url": "https://bugzilla.suse.com/1258081"
        }
      ],
      "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 Enterprise Server LTSS Extended Security 12 SP5:libssh-devel-doc-0.6.3-12.28.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 2.2,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Enterprise Server LTSS Extended Security 12 SP5:libssh-devel-doc-0.6.3-12.28.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-04-15T10:21:31Z",
          "details": "low"
        }
      ],
      "title": "CVE-2026-0967"
    },
    {
      "cve": "CVE-2026-0968",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-0968"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "A flaw was found in libssh in which a malicious SFTP (SSH File Transfer Protocol) server can exploit this by sending a malformed \u0027longname\u0027 field within an `SSH_FXP_NAME` message during a file listing operation. This missing null check can lead to reading beyond allocated memory on the heap. This can cause unexpected behavior or lead to a denial of service (DoS) due to application crashes.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Enterprise Server LTSS Extended Security 12 SP5:libssh-devel-doc-0.6.3-12.28.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-0968",
          "url": "https://www.suse.com/security/cve/CVE-2026-0968"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1258080 for CVE-2026-0968",
          "url": "https://bugzilla.suse.com/1258080"
        }
      ],
      "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 Enterprise Server LTSS Extended Security 12 SP5:libssh-devel-doc-0.6.3-12.28.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 3.7,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:L",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Enterprise Server LTSS Extended Security 12 SP5:libssh-devel-doc-0.6.3-12.28.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-04-15T10:21:31Z",
          "details": "low"
        }
      ],
      "title": "CVE-2026-0968"
    },
    {
      "cve": "CVE-2026-3731",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-3731"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "A weakness has been identified in libssh up to 0.11.3. The impacted element is the function sftp_extensions_get_name/sftp_extensions_get_data of the file src/sftp.c of the component SFTP Extension Name Handler. Executing a manipulation of the argument idx can lead to out-of-bounds read. The attack may be performed from remote. Upgrading to version 0.11.4 and 0.12.0 is sufficient to resolve this issue. This patch is called 855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60. You should upgrade the affected component.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Enterprise Server LTSS Extended Security 12 SP5:libssh-devel-doc-0.6.3-12.28.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-3731",
          "url": "https://www.suse.com/security/cve/CVE-2026-3731"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1259377 for CVE-2026-3731",
          "url": "https://bugzilla.suse.com/1259377"
        }
      ],
      "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 Enterprise Server LTSS Extended Security 12 SP5:libssh-devel-doc-0.6.3-12.28.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Enterprise Server LTSS Extended Security 12 SP5:libssh-devel-doc-0.6.3-12.28.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-04-15T10:21:31Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2026-3731"
    }
  ]
}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.