Security advisory

{
  "id": "1a5ffd465e81a23cdc76fa042053adad293d2472ee75aeece294b1a749ea8d73",
  "url": "https://osv.dev/vulnerability/CVE-2020-22217",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-22217",
    "summary": "Buffer overflow vulnerability in c-ares before 1_16_1 thru 1_17_0 via function ares_parse_soa_reply in ares_parse_soa_reply.c.",
    "evidence": "osv:CVE-2020-22217",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-22217",
      "aliases": [
        "CVE-2020-22217"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/c-ares/c-ares",
              "type": "GIT",
              "events": [
                {
                  "introduced": "74a1426ba60e2cd7977e53a22ef839c87415066e"
                },
                {
                  "last_affected": "799e81d4ace75af7d530857d4f8b35913a27463e"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:c-ares:c-ares:1.16.1:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.16.1"
                      },
                      {
                        "last_affected": "1.16.1"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:c-ares:c-ares:1.17.0:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.17.0"
                      },
                      {
                        "last_affected": "1.17.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.16.1",
            "1.17.0",
            "c-ares-1_17_0",
            "cares-1_16_1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-22217.json"
          }
        }
      ],
      "modified": "2026-10-20T10:52:48.144586863Z",
      "provider": "osv",
      "references": [
        "https://lists.debian.org/debian-lts-announce/2023/09/msg00014.html",
        "https://github.com/c-ares/c-ares/issues/333"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "10.0"
                  },
                  {
                    "last_affected": "10.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2020-22217",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 383837,
  "published_at": "2023-08-22T19:16:19.05+00:00"
}