squid, squid3 — security advisory

{
  "id": "f7e26711ffeffeea67c813c100d99944ae6ea6a79613092c9f8c91142f3cd560",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2025-21311",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2025-21311",
    "summary": "Windows NTLM V1 Elevation of Privilege Vulnerability",
    "evidence": "osv:UBUNTU-CVE-2025-21311",
    "products": [
      {
        "name": {
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        },
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        "fixed_versions": [],
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            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.5.12-1ubuntu6",
            "evidence": "/affected/0/versions"
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          {
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            "evidence": "/affected/0/versions"
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            "evidence": "/affected/0/versions"
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            "evidence": "/affected/0/versions"
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          },
          {
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            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.5.12-1ubuntu7.12",
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          },
          {
            "value": "3.5.12-1ubuntu7.13",
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          {
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            "evidence": "/affected/0/versions"
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          {
            "value": "3.5.12-1ubuntu7.16+esm1",
            "evidence": "/affected/0/versions"
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            "value": "3.5.12-1ubuntu7.16+esm2",
            "evidence": "/affected/0/versions"
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          {
            "value": "3.5.12-1ubuntu7.16+esm3",
            "evidence": "/affected/0/versions"
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            "evidence": "/affected/0/versions"
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      },
      {
        "name": {
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        },
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            "evidence": "/affected/1/versions"
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            "evidence": "/affected/1/versions"
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            "evidence": "/affected/1/versions"
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            "evidence": "/affected/1/versions"
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            "evidence": "/affected/1/versions"
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          {
            "value": "3.5.27-1ubuntu1.14+esm1",
            "evidence": "/affected/1/versions"
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          {
            "value": "3.5.27-1ubuntu1.14+esm2",
            "evidence": "/affected/1/versions"
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            "value": "3.5.27-1ubuntu1.14+esm3",
            "evidence": "/affected/1/versions"
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            "value": "3.5.27-1ubuntu1.14+esm4",
            "evidence": "/affected/1/versions"
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            "value": "3.5.27-1ubuntu1.14+esm5",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "3.5.27-1ubuntu1.14+esm6",
            "evidence": "/affected/1/versions"
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            "evidence": "/affected/2/versions"
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            "evidence": "/affected/2/versions"
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            "evidence": "/affected/2/versions"
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            "evidence": "/affected/2/versions"
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            "evidence": "/affected/2/versions"
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            "evidence": "/affected/2/versions"
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            "evidence": "/affected/2/versions"
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            "evidence": "/affected/2/versions"
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            "evidence": "/affected/2/versions"
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            "evidence": "/affected/2/versions"
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            "value": "4.10-1ubuntu1.8",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "4.10-1ubuntu1.9",
            "evidence": "/affected/2/versions"
          },
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            "value": "4.10-1ubuntu1.10",
            "evidence": "/affected/2/versions"
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          {
            "value": "4.10-1ubuntu1.11",
            "evidence": "/affected/2/versions"
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            "value": "4.10-1ubuntu1.12",
            "evidence": "/affected/2/versions"
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            "value": "4.10-1ubuntu1.13",
            "evidence": "/affected/2/versions"
          },
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            "value": "4.10-1ubuntu1.13+esm1",
            "evidence": "/affected/2/versions"
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            "value": "4.10-1ubuntu1.13+esm2",
            "evidence": "/affected/2/versions"
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        },
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            "evidence": "/affected/3/versions"
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        },
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            "evidence": "/affected/4/versions"
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            "evidence": "/affected/4/versions"
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            "evidence": "/affected/4/versions"
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            "evidence": "/affected/4/versions"
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            "evidence": "/affected/4/versions"
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            "evidence": "/affected/4/versions"
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            "evidence": "/affected/4/versions"
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            "evidence": "/affected/4/versions"
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            "evidence": "/affected/4/versions"
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            "evidence": "/affected/4/versions"
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            "value": "6.13-0ubuntu0.24.04.2",
            "evidence": "/affected/4/versions"
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            "value": "6.13-0ubuntu0.24.04.3",
            "evidence": "/affected/4/versions"
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            "evidence": "/affected/4/versions"
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            "evidence": "/affected/4/versions"
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    ],
    "severity": "critical",
    "structured": {
      "id": "UBUNTU-CVE-2025-21311",
      "aliases": [
        "UBUNTU-CVE-2025-21311"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        },
        {
          "type": "Ubuntu",
          "score": "medium"
        }
      ],
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        {
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            {
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              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
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          "database_specific": {
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          },
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          },
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            "5.7-0ubuntu0.22.04.2",
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            "5.9-0ubuntu0.22.04.7",
            "5.9-0ubuntu0.22.04.8"
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          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-21311.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "squid",
                "binary_version": "5.9-0ubuntu0.22.04.8"
              },
              {
                "binary_name": "squid-cgi",
                "binary_version": "5.9-0ubuntu0.22.04.8"
              },
              {
                "binary_name": "squid-common",
                "binary_version": "5.9-0ubuntu0.22.04.8"
              },
              {
                "binary_name": "squid-openssl",
                "binary_version": "5.9-0ubuntu0.22.04.8"
              },
              {
                "binary_name": "squid-purge",
                "binary_version": "5.9-0ubuntu0.22.04.8"
              },
              {
                "binary_name": "squidclient",
                "binary_version": "5.9-0ubuntu0.22.04.8"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "squid",
            "purl": "pkg:deb/ubuntu/squid?arch=source&distro=noble",
            "ecosystem": "Ubuntu:24.04:LTS"
          },
          "versions": [
            "6.1-2ubuntu1",
            "6.1-2ubuntu2",
            "6.5-1ubuntu1",
            "6.5-1ubuntu2",
            "6.5-1ubuntu3",
            "6.6-1ubuntu4",
            "6.6-1ubuntu5",
            "6.6-1ubuntu5.1",
            "6.10-0ubuntu0.24.04.1",
            "6.13-0ubuntu0.24.04.1",
            "6.13-0ubuntu0.24.04.2",
            "6.13-0ubuntu0.24.04.3",
            "6.14-0ubuntu0.24.04.1",
            "6.14-0ubuntu0.24.04.2",
            "6.14-0ubuntu0.24.04.4",
            "6.14-0ubuntu0.24.04.5"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-21311.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "squid",
                "binary_version": "6.14-0ubuntu0.24.04.5"
              },
              {
                "binary_name": "squid-cgi",
                "binary_version": "6.14-0ubuntu0.24.04.5"
              },
              {
                "binary_name": "squid-common",
                "binary_version": "6.14-0ubuntu0.24.04.5"
              },
              {
                "binary_name": "squid-openssl",
                "binary_version": "6.14-0ubuntu0.24.04.5"
              },
              {
                "binary_name": "squid-purge",
                "binary_version": "6.14-0ubuntu0.24.04.5"
              },
              {
                "binary_name": "squidclient",
                "binary_version": "6.14-0ubuntu0.24.04.5"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-20T22:45:06.638614564Z",
      "provider": "osv",
      "upstream": [
        "CVE-2025-21311"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2025-21311",
        "https://www.cve.org/CVERecord?id=CVE-2025-21311"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2025-21311",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 390721,
  "published_at": "2025-01-14T18:15:00+00:00"
}