Security advisory

{
  "id": "56a2664d0b2d7c6caf710fd21f2aed4759120dbab5caf24ec4fe363aec6ef30e",
  "url": "https://osv.dev/vulnerability/CVE-2020-15136",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-15136",
    "summary": "In ectd before versions 3.4.10 and 3.3.23, gateway TLS authentication is only applied to endpoints detected in DNS SRV records. When starting a gateway, TLS authentication will only be attempted on endpoints identified in DNS SRV records for a given domain, which occurs in the discoverEndpoints function. No authentication is performed against endpoints provided in the --endpoints flag. This has been fixed in versions 3.4.10 and 3.3.23 with improved documentation and deprecation of the functionality.",
    "evidence": "osv:CVE-2020-15136",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-15136",
      "aliases": [
        "CVE-2020-15136",
        "GHSA-wr2v-9rpq-c35q"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/etcd-io/etcd",
              "type": "GIT",
              "events": [
                {
                  "introduced": "c23606781f63d09917a1e7abfcefeb337a9608ea"
                },
                {
                  "fixed": "4873f5516bd98c82dddb81247038337f25abac4e"
                },
                {
                  "introduced": "898bd1351fcf6e0ebce8d7c8bbbbf3f3e42aa42c"
                },
                {
                  "fixed": "18dfb9cca345bb2b2fbe73d5fc31028c2477bef1"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:redhat:etcd:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.3.0"
                      },
                      {
                        "fixed": "3.3.23"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:redhat:etcd:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.4.0"
                      },
                      {
                        "fixed": "3.4.10"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v3.3.22",
            "v3.4.9",
            "v3.4.8",
            "v3.3.21",
            "v3.3.20",
            "v3.4.7",
            "v3.3.19",
            "v3.4.6",
            "v3.4.5",
            "v3.4.4",
            "v3.3.18",
            "v3.4.3",
            "v3.3.17",
            "v3.3.16",
            "v3.4.2",
            "v3.4.1",
            "v3.4.0",
            "v3.3.15",
            "v3.3.14",
            "v3.3.14-rc.0",
            "v3.3.14-beta.0",
            "v3.3.13",
            "v3.3.12",
            "v3.3.11",
            "v3.3.10",
            "v3.3.9",
            "v3.3.8",
            "v3.3.7",
            "v3.3.6",
            "v3.3.5",
            "v3.3.4",
            "v3.3.3",
            "v3.3.2",
            "v3.3.1",
            "v3.3.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-15136.json"
          }
        }
      ],
      "modified": "2026-10-20T10:51:52.064864448Z",
      "provider": "osv",
      "references": [
        "https://github.com/etcd-io/etcd/blob/master/Documentation/op-guide/gateway.md",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6B6R43Y7M3DCHWK3L3UVGE2K6WWECMP/",
        "https://github.com/etcd-io/etcd/security/advisories/GHSA-wr2v-9rpq-c35q"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "32"
                  },
                  {
                    "last_affected": "32"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2020-15136",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 383045,
  "published_at": "2020-08-06T23:15:11.577+00:00"
}