Security advisory

{
  "id": "4d5cd74d5be1b628d3ff2d1bdd7dec7994704e2d40c0b82f7950284a2588e9dc",
  "url": "https://osv.dev/vulnerability/CVE-2021-41524",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-41524",
    "summary": "While fuzzing the 2.4.49 httpd, a new null pointer dereference was detected during HTTP/2 request processing, allowing an external source to DoS the server. This requires a specially crafted request. The vulnerability was recently introduced in version 2.4.49. No exploit is known to the project.",
    "evidence": "osv:CVE-2021-41524",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-41524",
      "aliases": [
        "BIT-apache-2021-41524",
        "CVE-2021-41524"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/apache/httpd",
              "type": "GIT",
              "events": [
                {
                  "introduced": "bbacd798d1494b5a99f4e3edab068ccc77b03b7e"
                },
                {
                  "last_affected": "bbacd798d1494b5a99f4e3edab068ccc77b03b7e"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:apache:http_server:2.4.49:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.4.49"
                      },
                      {
                        "last_affected": "2.4.49"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.4.49",
            "candidate-2.4.49"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-41524.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:23.716298525Z",
      "provider": "osv",
      "references": [
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DSM6UWQICBJ2TU727RENU3HBKEAFLT6T/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EUVJVRJRBW5QVX4OY3NOHZDQ3B3YOTSG/",
        "https://httpd.apache.org/security/vulnerabilities_24.html",
        "https://security.gentoo.org/glsa/202208-20",
        "https://security.netapp.com/advisory/ntap-20211029-0009/",
        "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-pathtrv-LAzg68cZ",
        "https://www.oracle.com/security-alerts/cpujan2022.html"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
              "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "34"
                  },
                  {
                    "last_affected": "34"
                  },
                  {
                    "introduced": "35"
                  },
                  {
                    "last_affected": "35"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:*",
              "cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:*",
              "cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:*"
            ],
            "vendor_product": "oracle:instantis_enterprisetrack",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "17.1"
                  },
                  {
                    "last_affected": "17.1"
                  },
                  {
                    "introduced": "17.2"
                  },
                  {
                    "last_affected": "17.2"
                  },
                  {
                    "introduced": "17.3"
                  },
                  {
                    "last_affected": "17.3"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-41524",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 430988,
  "published_at": "2021-10-05T09:15:07.427+00:00"
}