SUSE-SU-2025:20557-1

Vulnerability from csaf_suse - Published: 2025-08-14 09:26 - Updated: 2025-08-14 09:26
Summary
Security update for libssh

Notes

Title of the patch
Security update for libssh
Description of the patch
This update for libssh fixes the following issues: - CVE-2025-5372: ssh_kdf() returns a success code on certain failures (bsc#1245314) - CVE-2025-5987: Invalid return code for chacha20 poly1305 with OpenSSL backend (bsc#1245317) - CVE-2025-4877: Write beyond bounds in binary to base64 conversion functions (bsc#1245309) - CVE-2025-4878: Use of uninitialized variable in privatekey_from_file() (bsc#1245310) - CVE-2025-5318: Likely read beyond bounds in sftp server handle management (bsc#1245311) - CVE-2025-5351: Double free in functions exporting keys (bsc#1245312)
Patchnames
SUSE-SLE-Micro-6.0-419
Terms of use
CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
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      "notes": [
        {
          "category": "general",
          "text": "There\u0027s a vulnerability in the libssh package where when a libssh consumer passes in an unexpectedly large input buffer to ssh_get_fingerprint_hash() function. In such cases the bin_to_base64() function can experience an integer overflow leading to a memory under allocation, when that happens it\u0027s possible that the program perform out of bounds write leading to a heap corruption.\nThis issue affects only 32-bits builds of libssh.",
          "title": "CVE description"
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          "text": "A flaw was found in the key export functionality of libssh. The issue occurs in the internal function responsible for converting cryptographic keys into serialized formats. During error handling, a memory structure is freed but not cleared, leading to a potential double free issue if an additional failure occurs later in the function. This condition may result in heap corruption or application instability in low-memory scenarios, posing a risk to system reliability where key export operations are performed.",
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          "SUSE Linux Micro 6.0:libssh-config-0.10.6-2.1.aarch64",
          "SUSE Linux Micro 6.0:libssh-config-0.10.6-2.1.s390x",
          "SUSE Linux Micro 6.0:libssh-config-0.10.6-2.1.x86_64",
          "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.aarch64",
          "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.s390x",
          "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2025-5351",
          "url": "https://www.suse.com/security/cve/CVE-2025-5351"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1245312 for CVE-2025-5351",
          "url": "https://bugzilla.suse.com/1245312"
        }
      ],
      "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:libssh-config-0.10.6-2.1.aarch64",
            "SUSE Linux Micro 6.0:libssh-config-0.10.6-2.1.s390x",
            "SUSE Linux Micro 6.0:libssh-config-0.10.6-2.1.x86_64",
            "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.aarch64",
            "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.s390x",
            "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.4,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.0:libssh-config-0.10.6-2.1.aarch64",
            "SUSE Linux Micro 6.0:libssh-config-0.10.6-2.1.s390x",
            "SUSE Linux Micro 6.0:libssh-config-0.10.6-2.1.x86_64",
            "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.aarch64",
            "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.s390x",
            "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2025-08-14T09:26:49Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2025-5351"
    },
    {
      "cve": "CVE-2025-5372",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2025-5372"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "A flaw was found in libssh versions built with OpenSSL versions older than 3.0, specifically in the ssh_kdf() function responsible for key derivation. Due to inconsistent interpretation of return values where OpenSSL uses 0 to indicate failure and libssh uses 0 for success-the function may mistakenly return a success status even when key derivation fails. This results in uninitialized cryptographic key buffers being used in subsequent communication, potentially compromising SSH sessions\u0027 confidentiality, integrity, and availability.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Micro 6.0:libssh-config-0.10.6-2.1.aarch64",
          "SUSE Linux Micro 6.0:libssh-config-0.10.6-2.1.s390x",
          "SUSE Linux Micro 6.0:libssh-config-0.10.6-2.1.x86_64",
          "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.aarch64",
          "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.s390x",
          "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2025-5372",
          "url": "https://www.suse.com/security/cve/CVE-2025-5372"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1245314 for CVE-2025-5372",
          "url": "https://bugzilla.suse.com/1245314"
        }
      ],
      "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:libssh-config-0.10.6-2.1.aarch64",
            "SUSE Linux Micro 6.0:libssh-config-0.10.6-2.1.s390x",
            "SUSE Linux Micro 6.0:libssh-config-0.10.6-2.1.x86_64",
            "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.aarch64",
            "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.s390x",
            "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.0:libssh-config-0.10.6-2.1.aarch64",
            "SUSE Linux Micro 6.0:libssh-config-0.10.6-2.1.s390x",
            "SUSE Linux Micro 6.0:libssh-config-0.10.6-2.1.x86_64",
            "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.aarch64",
            "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.s390x",
            "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2025-08-14T09:26:49Z",
          "details": "important"
        }
      ],
      "title": "CVE-2025-5372"
    },
    {
      "cve": "CVE-2025-5987",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2025-5987"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "A flaw was found in libssh when using the ChaCha20 cipher with the OpenSSL library. If an attacker manages to exhaust the heap space, this error is not detected and may lead to libssh using a partially initialized cipher context. This occurs because the OpenSSL error code returned aliases with the SSH_OK code, resulting in libssh not properly detecting the error returned by the OpenSSL library. This issue can lead to undefined behavior, including compromised data confidentiality and integrity or crashes.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Micro 6.0:libssh-config-0.10.6-2.1.aarch64",
          "SUSE Linux Micro 6.0:libssh-config-0.10.6-2.1.s390x",
          "SUSE Linux Micro 6.0:libssh-config-0.10.6-2.1.x86_64",
          "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.aarch64",
          "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.s390x",
          "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2025-5987",
          "url": "https://www.suse.com/security/cve/CVE-2025-5987"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1245317 for CVE-2025-5987",
          "url": "https://bugzilla.suse.com/1245317"
        }
      ],
      "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:libssh-config-0.10.6-2.1.aarch64",
            "SUSE Linux Micro 6.0:libssh-config-0.10.6-2.1.s390x",
            "SUSE Linux Micro 6.0:libssh-config-0.10.6-2.1.x86_64",
            "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.aarch64",
            "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.s390x",
            "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.0:libssh-config-0.10.6-2.1.aarch64",
            "SUSE Linux Micro 6.0:libssh-config-0.10.6-2.1.s390x",
            "SUSE Linux Micro 6.0:libssh-config-0.10.6-2.1.x86_64",
            "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.aarch64",
            "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.s390x",
            "SUSE Linux Micro 6.0:libssh4-0.10.6-2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2025-08-14T09:26:49Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2025-5987"
    }
  ]
}


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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.