CVE catalog

CVE-2023-25564

gss-ntlmssp affected and fixed versions

[CVE catalog]

GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that implements NTLM authentication. Prior to version 1.2.0, memory corruption can be triggered when decoding UTF16 strings. The variable `outlen` was not initialized and could cause writing a zero to an arbitrary place in memory if `ntlm_str_convert()` were to fail, which would leave `outlen` uninitialized. This can lead to a denial of service if the write hits unmapped memory or randomly corrupts a byte in the application memory space. This vulnerability can trigger an out-of-bounds write, leading to memory corruption. This vulnerability can be triggered via the main `gss_accept_sec_context` entry point. This issue is fixed in version 1.2.0.

Severity
High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
Source
[NVD] · [CVE record]
EPSS
1.94% · Oct 27, 2026

Projects and upstream resources

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence
Original provider fields
{
  "package_releases": [
    {
      "name": "gss-ntlmssp",
      "status": "fixed",
      "release": "sid",
      "version": "1.3.1-1"
    },
    {
      "name": "gss-ntlmssp",
      "status": "fixed",
      "release": "forky",
      "version": "1.3.1-1"
    },
    {
      "name": "gss-ntlmssp",
      "status": "fixed",
      "release": "trixie",
      "version": "1.2.0-1"
    },
    {
      "name": "gss-ntlmssp",
      "status": "fixed",
      "release": "bookworm",
      "version": "1.2.0-1"
    }
  ],
  "fixed_versions": [
    {
      "bug": 1031369,
      "name": "gss-ntlmssp",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "1.2.0-1"
    },
    {
      "bug": 1031369,
      "name": "gss-ntlmssp",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "1.2.0-1"
    },
    {
      "bug": 1031369,
      "name": "gss-ntlmssp",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": "1.2.0-1"
    },
    {
      "bug": 1031369,
      "name": "gss-ntlmssp",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": "1.2.0-1"
    }
  ],
  "distribution_packages": [
    {
      "name": "gss-ntlmssp",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.7.0-4ubuntu0.22.04.1~esm1"
            }
          ]
        }
      ],
      "release": "pro",
      "versions": [
        "0.7.0-4build3",
        "0.7.0-4build4"
      ],
      "ecosystem": "deb",
      "fixed_version": "0.7.0-4ubuntu0.22.04.1~esm1",
      "provider_record_id": "UBUNTU-CVE-2023-25564"
    }
  ]
}

[Debian bug #1031369]

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

  • [gss-ntlmssp]Unknown
    Details (2)

    • 1.2.0-1 · amd64 · bookworm

      Fixed · Fixed: 1.2.0-1

      dsa · gss-ntlmssp · debian · bookworm; dsa · gss-ntlmssp · debian · 12

    • 1.2.0-1 · arm64 · bookworm

      Fixed · Fixed: 1.2.0-1

      dsa · gss-ntlmssp · debian · bookworm; dsa · gss-ntlmssp · debian · 12

  • [gss-ntlmssp-dev]Unknown

    Source package: [gss-ntlmssp]

    Details (2)

    • 1.2.0-1 · amd64 · bookworm

      Fixed · Fixed: 1.2.0-1

      dsa · gss-ntlmssp · debian · bookworm; dsa · gss-ntlmssp · debian · 12

    • 1.2.0-1 · arm64 · bookworm

      Fixed · Fixed: 1.2.0-1

      dsa · gss-ntlmssp · debian · bookworm; dsa · gss-ntlmssp · debian · 12

[Debian 13 (Trixie)]

  • [gss-ntlmssp]Unknown

    Source package: [gss-ntlmssp]

    Details (2)

    • 1.2.0-1+b2 · amd64 · trixie

      Fixed · Fixed: 1.2.0-1

      dsa · gss-ntlmssp · debian · 13

    • 1.2.0-1+b3 · arm64 · trixie

      Fixed · Fixed: 1.2.0-1

      dsa · gss-ntlmssp · debian · 13

  • [gss-ntlmssp-dev]Unknown

    Source package: [gss-ntlmssp]

    Details (2)

    • 1.2.0-1+b2 · amd64 · trixie

      Fixed · Fixed: 1.2.0-1

      dsa · gss-ntlmssp · debian · 13

    • 1.2.0-1+b3 · arm64 · trixie

      Fixed · Fixed: 1.2.0-1

      dsa · gss-ntlmssp · debian · 13

Observed:

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]