Security advisory

{
  "id": "d4deca554eec845db296b647aa45bd84f761b9c0ba02932a464aca26535a83d4",
  "url": "https://osv.dev/vulnerability/CVE-2016-3067",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2016-3067",
    "summary": "Cygwin before 2.5.0 does not properly handle updating permissions when changing users, which allows attackers to gain privileges.",
    "evidence": "osv:CVE-2016-3067",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2016-3067",
      "aliases": [
        "CVE-2016-3067"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/cygwin/cygwin",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "61f181d6b872e6f37b04fed790fa903a312a3795"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.5.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "cygwin-2_6_1-release",
            "newlib-snapshot-20160923",
            "cygwin-2_6_0-release",
            "cygwin-2_5_2-release",
            "newlib-snapshot-20160527",
            "cygwin-2_5_1-release",
            "cygwin-2_5_0-release",
            "newlib-2_4_0",
            "newlib-snapshot-20160226",
            "cygwin-2_4_1-release",
            "cygwin-2_4_0-release",
            "newlib-snapshot-20160104",
            "newlib-2_3_0",
            "cygwin-2_3_1-release",
            "cygwin-2_3_1-relase",
            "cygwin-2_3_0-release",
            "newlib-snapshot-20151023",
            "newlib-snapshot-20150924",
            "newlib-snapshot-20150824",
            "cygwin-2_2_1-release",
            "cygwin-2_2_0-release",
            "newlib-snapshot-20150723",
            "cygwin-2_1_0-release",
            "newlib-snapshot-20150623",
            "cygwin-2_0_4-release",
            "cygwin-2_0_3-release",
            "newlib-snapshot-20150526",
            "cygwin-2_0_2-release",
            "cygwin-2_0_1-release",
            "cygwin-2_0_0-release",
            "binu_ss_19990502"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-3067.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:27.277071875Z",
      "provider": "osv",
      "references": [
        "https://sourceware.org/git/?p=newlib-cygwin.git%3Ba=commit%3Bh=205862ed08649df8f50b926a2c58c963f571b044",
        "https://cygwin.com/ml/cygwin-announce/2016-02/msg00023.html",
        "https://cygwin.com/ml/cygwin-announce/2016-04/msg00020.html",
        "https://cygwin.com/ml/cygwin-announce/2016-04/msg00054.html",
        "https://cygwin.com/ml/cygwin/2016-02/msg00129.html"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:cygwin:cygwin:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "cygwin:cygwin",
            "extracted_events": [
              {
                "range": [
                  {
                    "last_affected": "2.4.1-1"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2016-3067",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 431795,
  "published_at": "2017-04-21T20:59:00.633+00:00"
}