HighFix available

gss-ntlmssp — security advisory

Type: advisorySources: OSVAdvisory ID: DEBIAN-CVE-2023-25567

GSS-NTLMSSP, a mechglue plugin for the GSSAPI library that implements NTLM authentication, has an out-of-bounds read when decoding target information prior to version 1.2.0. The length of the `av_pair` is not checked properly for two of the elements which can trigger an out-of-bound read. The out-of-bounds read can be triggered via the main `gss_accept_sec_context` entry point and could cause a denial-of-service if the memory is unmapped. The issue is fixed in version 1.2.0.

Products: gss-ntlmssp
Affected versions: Not specified
Fixed versions: 1.2.0-1
CVEs: CVE-2023-25567
Confirmed fixed CVEs: Not specified
Updated in this feed: 1 Nov 2026, 15:27 UTC · Revision 1

Source evidence

DEBIAN-CVE-2023-25567

core-osv · Original source

Published 14 Feb 2023, 18:15 UTC

osv:DEBIAN-CVE-2023-25567

gss-ntlmssp

Fixed versions: 1.2.0-1

gss-ntlmssp

Fixed versions: 1.2.0-1

gss-ntlmssp

Fixed versions: 1.2.0-1

Complete source record

{
  "id": "fa6342642ef77b09a358f51490b43e24951ecefb91e5ac1282c10408825329dc",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2023-25567",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2023-25567",
    "summary": "GSS-NTLMSSP, a mechglue plugin for the GSSAPI library that implements NTLM authentication, has an out-of-bounds read when decoding target information prior to version 1.2.0. The length of the `av_pair` is not checked properly for two of the elements which can trigger an out-of-bound read. The out-of-bounds read can be triggered via the main `gss_accept_sec_context` entry point and could cause a denial-of-service if the memory is unmapped. The issue is fixed in version 1.2.0.",
    "evidence": "osv:DEBIAN-CVE-2023-25567",
    "products": [
      {
        "name": {
          "value": "gss-ntlmssp",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.2.0-1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "gss-ntlmssp",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.2.0-1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "gss-ntlmssp",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.2.0-1",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "DEBIAN-CVE-2023-25567",
      "aliases": [
        "DEBIAN-CVE-2023-25567"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.2.0-1"
                }
              ]
            }
          ],
          "package": {
            "name": "gss-ntlmssp",
            "purl": "pkg:deb/debian/gss-ntlmssp?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-25567.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.2.0-1"
                }
              ]
            }
          ],
          "package": {
            "name": "gss-ntlmssp",
            "purl": "pkg:deb/debian/gss-ntlmssp?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-25567.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.2.0-1"
                }
              ]
            }
          ],
          "package": {
            "name": "gss-ntlmssp",
            "purl": "pkg:deb/debian/gss-ntlmssp?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-25567.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-26T18:00:37.525302183Z",
      "provider": "osv",
      "upstream": [
        "CVE-2023-25567"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2023-25567"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2023-25567",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 455099,
  "published_at": "2023-02-14T18:15:13.487+00:00"
}