Security advisory

{
  "id": "dc135823391f82e727038fc55b9db2a0f86d3459b4e394f2fc9833fc49bb8993",
  "url": "https://osv.dev/vulnerability/CVE-2017-13021",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2017-13021",
    "summary": "The ICMPv6 parser in tcpdump before 4.9.2 has a buffer over-read in print-icmp6.c:icmp6_print().",
    "evidence": "osv:CVE-2017-13021",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2017-13021",
      "aliases": [
        "CVE-2017-13021"
      ],
      "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/the-tcpdump-group/tcpdump",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "993a67c8e648bc8b19881e29a60f41273cfbee7b"
                },
                {
                  "fixed": "67c7126062d59729cd421bb38f9594015c9907ba"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:tcpdump:tcpdump:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "4.9.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "67c7126062d59729cd421bb38f9594015c9907ba"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "tcpdump-4.9.1",
            "tcpdump-4.9.0",
            "tcpdump-4.9.0-bp",
            "tcpdump-4.7.0-bp",
            "tcpdump-4.6.0-bp",
            "tcpdump-4.6.0",
            "tcpdump-4.5.0",
            "tcpdump-3.8-bp",
            "tcpdump-3.7.1",
            "tcpdump-3.6.1",
            "tcpdump-3.5.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-13021.json",
            "vanir_signatures": [
              {
                "id": "CVE-2017-13021-52f0872e",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "83582845347540620492194701955985557803",
                    "177568430537303103527377166793235341145",
                    "319599135815728648978403099529769882750",
                    "328919621073038910447855633331647472840"
                  ]
                },
                "source": "https://github.com/the-tcpdump-group/tcpdump/commit/67c7126062d59729cd421bb38f9594015c9907ba",
                "target": {
                  "file": "print-icmp6.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2017-13021-fd286838",
                "digest": {
                  "length": 8138,
                  "function_hash": "88042001857164022284303757811042837602"
                },
                "source": "https://github.com/the-tcpdump-group/tcpdump/commit/67c7126062d59729cd421bb38f9594015c9907ba",
                "target": {
                  "file": "print-icmp6.c",
                  "function": "icmp6_print"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-24T14:09:03Z"
          }
        }
      ],
      "modified": "2026-10-24T14:09:03.256028388Z",
      "provider": "osv",
      "references": [
        "https://support.apple.com/HT208221",
        "https://access.redhat.com/errata/RHEA-2018:0705",
        "https://security.gentoo.org/glsa/201709-23",
        "https://github.com/the-tcpdump-group/tcpdump/commit/67c7126062d59729cd421bb38f9594015c9907ba"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:tcpdump:tcpdump:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "tcpdump:tcpdump",
            "extracted_events": [
              {
                "range": [
                  {
                    "last_affected": "4.9.1"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2017-13021",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 443140,
  "published_at": "2017-09-14T06:29:01.997+00:00"
}