SQUID-2023:10 Denial of Service in HTTP Request parsing

{
  "id": "90c9173dfeee6ad7b48197a357cc5011410565f61aeff9cbdc3650d45b2f124b",
  "url": "https://osv.dev/vulnerability/CVE-2023-50269",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "SQUID-2023:10 Denial of Service in HTTP Request parsing",
    "summary": "Squid is a caching proxy for the Web. Due to an Uncontrolled Recursion bug in versions 2.6 through 2.7.STABLE9, versions 3.1 through 5.9, and versions 6.0.1 through 6.5, Squid may be vulnerable to a Denial of Service attack against HTTP Request parsing. This problem allows a remote client to perform Denial of Service attack by sending a large X-Forwarded-For header when the follow_x_forwarded_for feature is configured. This bug is fixed by Squid version 6.6. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives.",
    "evidence": "osv:CVE-2023-50269",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2023-50269",
      "aliases": [
        "CVE-2023-50269",
        "GHSA-wgq4-4cfg-c4x3"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/squid-cache/squid",
              "type": "GIT",
              "events": [
                {
                  "introduced": "f188960023551b2e9cb2a9df245b92bfeef37056"
                },
                {
                  "last_affected": "20d1c7236c7493b1f8b7e47f2e2afc529232071c"
                },
                {
                  "introduced": "ef1e128ce5a9733ae57d6595806bb832de389446"
                },
                {
                  "fixed": "e8118a7381213f5cfcdeb4cec1d2d854bfd261c8"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "3.1"
                      },
                      {
                        "last_affected": "5.9"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "introduced": "6.0.1"
                      },
                      {
                        "fixed": "6.6"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  }
                ]
              }
            }
          ],
          "versions": [
            "SQUID_6_5",
            "SQUID_6_4",
            "SQUID_6_3",
            "SQUID_6_2",
            "SQUID_6_1",
            "SQUID_6_0_3",
            "SQUID_6_0_2",
            "SQUID_6_0_1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-50269.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.627462768Z",
      "provider": "osv",
      "references": [
        "https://lists.debian.org/debian-lts-announce/2024/01/msg00003.html",
        "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS/",
        "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MEV66D3PAAY6K7TWDT3WZBLCPLASFJDC/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/50xxx/CVE-2023-50269.json",
        "https://github.com/squid-cache/squid/security/advisories/GHSA-wgq4-4cfg-c4x3",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-50269",
        "https://security.netapp.com/advisory/ntap-20240119-0005/"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-674"
        ],
        "cna_assigner": "GitHub_M",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "2.6"
                  },
                  {
                    "last_affected": "2.7.STABLE9"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/50xxx/CVE-2023-50269.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-50269",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504698,
  "published_at": "2023-12-14T17:09:25.168+00:00"
}