Security advisory

{
  "id": "238a8ce484804782da08418ed3a9086c215d4b06173a2599a9d478fd50f13069",
  "url": "https://osv.dev/vulnerability/CVE-2016-6261",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2016-6261",
    "summary": "The idna_to_ascii_4i function in lib/idna.c in libidn before 1.33 allows context-dependent attackers to cause a denial of service (out-of-bounds read and crash) via 64 bytes of input.",
    "evidence": "osv:CVE-2016-6261",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2016-6261",
      "aliases": [
        "CVE-2016-6261"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://cgit.git.savannah.gnu.org/cgit/libidn.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "f20ce1128fb7f4d33297eee307dddaf0f92ac72d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "fixed": "f20ce1128fb7f4d33297eee307dddaf0f92ac72d"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-6261.json"
          }
        }
      ],
      "modified": "2026-11-01T02:31:04.763708943Z",
      "provider": "osv",
      "references": [
        "https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E",
        "https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E",
        "https://lists.gnu.org/archive/html/help-libidn/2015-07/msg00016.html",
        "https://lists.gnu.org/archive/html/help-libidn/2016-07/msg00009.html"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:gnu:libidn:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "gnu:libidn",
            "extracted_events": [
              {
                "range": [
                  {
                    "last_affected": "1.32"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*",
              "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
              "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*"
            ],
            "vendor_product": "canonical:ubuntu_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "12.04"
                  },
                  {
                    "last_affected": "12.04"
                  },
                  {
                    "introduced": "14.04"
                  },
                  {
                    "last_affected": "14.04"
                  },
                  {
                    "introduced": "16.04"
                  },
                  {
                    "last_affected": "16.04"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*"
            ],
            "vendor_product": "opensuse:leap",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "42.1"
                  },
                  {
                    "last_affected": "42.1"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "1.33"
                  }
                ],
                "source": "DESCRIPTION"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2016-6261",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 442640,
  "published_at": "2016-09-07T20:59:04.263+00:00"
}