Traefik vulnerable to bypassing IP allow-lists via HTTP/3 early data requests in QUIC 0-RTT handshakes

{
  "id": "7e2c6b92eb2efd873de9306944897ef8b7d5710245aa5a55a498e19b52a6cf44",
  "url": "https://osv.dev/vulnerability/CVE-2024-39321",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Traefik vulnerable to bypassing IP allow-lists via HTTP/3 early data requests in QUIC 0-RTT handshakes",
    "summary": "Traefik is an HTTP reverse proxy and load balancer. Versions prior to 2.11.6, 3.0.4, and 3.1.0-rc3 have a vulnerability that allows bypassing IP allow-lists via HTTP/3 early data requests in QUIC 0-RTT handshakes sent with spoofed IP addresses. Versions 2.11.6, 3.0.4, and 3.1.0-rc3 contain a patch for this issue. No known workarounds are available.",
    "evidence": "osv:CVE-2024-39321",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2024-39321",
      "aliases": [
        "CVE-2024-39321",
        "GHSA-gxrv-wf35-62w9",
        "GO-2024-2973"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/traefik/traefik",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "927f0bc01a787ecfea254c52e56ea084acc8304a"
                },
                {
                  "introduced": "d99d2f95e66a28ee8180634dc80fdf13ba68c62a"
                },
                {
                  "fixed": "d42e75bb2eabbe684809929ce96abfe09d4e50fb"
                },
                {
                  "introduced": "4b4eaa49b5c93460cac089ed6d87e1c68c29d8d1"
                },
                {
                  "fixed": "876899be4bb347b00a2f697e776bc844f1afbcb3"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.11.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.0.0"
                      },
                      {
                        "fixed": "3.0.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:traefik:traefik:3.1.0:-:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.1.0-NA"
                      },
                      {
                        "last_affected": "3.1.0-NA"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:traefik:traefik:3.1.0:rc1:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.1.0-rc1"
                      },
                      {
                        "last_affected": "3.1.0-rc1"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:traefik:traefik:3.1.0:rc2:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.1.0-rc2"
                      },
                      {
                        "last_affected": "3.1.0-rc2"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "range": [
                      {
                        "fixed": "927f0bc01a787ecfea254c52e56ea084acc8304a"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v2.11.6"
                  },
                  {
                    "range": [
                      {
                        "fixed": "d42e75bb2eabbe684809929ce96abfe09d4e50fb"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v3.0.4"
                  },
                  {
                    "range": [
                      {
                        "fixed": "876899be4bb347b00a2f697e776bc844f1afbcb3"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v3.1.0-rc3"
                  }
                ]
              }
            }
          ],
          "versions": [
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-39321.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:46.579955872Z",
      "provider": "osv",
      "references": [
        "https://github.com/traefik/traefik/releases/tag/v2.11.6",
        "https://github.com/traefik/traefik/releases/tag/v3.0.4",
        "https://github.com/traefik/traefik/releases/tag/v3.1.0-rc3",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39321.json",
        "https://github.com/traefik/traefik/security/advisories/GHSA-gxrv-wf35-62w9",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-39321"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-639"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39321.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-39321",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 514577,
  "published_at": "2024-07-05T17:32:06.688+00:00"
}