Security advisory

{
  "id": "b3c5d51973ce712b89919556c12ba091a849bfd3a20fb19f4972959725c8bf17",
  "url": "https://osv.dev/vulnerability/CVE-2017-6519",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2017-6519",
    "summary": "avahi-daemon in Avahi through 0.6.32 and 0.7 inadvertently responds to IPv6 unicast queries with source addresses that are not on-link, which allows remote attackers to cause a denial of service (traffic amplification) and may cause information leakage by obtaining potentially sensitive information from the responding device via port-5353 UDP packets. NOTE: this may overlap CVE-2015-2809.",
    "evidence": "osv:CVE-2017-6519",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2017-6519",
      "aliases": [
        "CVE-2017-6519"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/avahi/avahi",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "4f334990f692ce08ab4ea2eece695f1592f535b2"
                },
                {
                  "introduced": "6242e5f0fe001b7de2ccaa9431db279b2ee76b83"
                },
                {
                  "last_affected": "6242e5f0fe001b7de2ccaa9431db279b2ee76b83"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:avahi:avahi:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.6.32"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:avahi:avahi:0.7:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.7"
                      },
                      {
                        "last_affected": "0.7"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.7",
            "v0.7",
            "v0.6.32",
            "0.6.32-rc",
            "v0.6.31",
            "v0.6.30",
            "v0.6.29",
            "v0.6.28",
            "v0.6.27",
            "v0.6.26",
            "v0.6.25",
            "v0.6.24",
            "v0.6.23"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-6519.json"
          }
        }
      ],
      "modified": "2026-10-20T10:49:30.373219079Z",
      "provider": "osv",
      "references": [
        "https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3E",
        "https://github.com/lathiat/avahi/issues/203#issuecomment-449536790",
        "https://usn.ubuntu.com/3876-1/",
        "https://usn.ubuntu.com/3876-2/",
        "https://www.secfu.net/advisories",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1426712",
        "https://github.com/lathiat/avahi/issues/203"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*",
              "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
              "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*",
              "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
              "cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*"
            ],
            "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"
                  },
                  {
                    "introduced": "18.04"
                  },
                  {
                    "last_affected": "18.04"
                  },
                  {
                    "introduced": "18.10"
                  },
                  {
                    "last_affected": "18.10"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2017-6519",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 380486,
  "published_at": "2017-05-01T01:59:00.297+00:00"
}