NULL pointer dereference in httpd core

{
  "id": "6539a287115e5e891999f3bc77a8460d08ba94fecc88c4c063ba7e3e7883145a",
  "url": "https://osv.dev/vulnerability/BIT-apache-2021-34798",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "NULL pointer dereference in httpd core",
    "summary": "Malformed requests may cause the server to dereference a NULL pointer. This issue affects Apache HTTP Server 2.4.48 and earlier.",
    "evidence": "osv:BIT-apache-2021-34798",
    "products": [
      {
        "name": {
          "value": "apache",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.4.49",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "BIT-apache-2021-34798",
      "aliases": [
        "BIT-apache-2021-34798",
        "CVE-2021-34798"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.4.49"
                }
              ]
            }
          ],
          "package": {
            "name": "apache",
            "purl": "pkg:bitnami/apache",
            "ecosystem": "Bitnami"
          },
          "severity": [
            {
              "type": "CVSS_V3",
              "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
            }
          ],
          "database_specific": {
            "source": "https://github.com/bitnami/vulndb/tree/main/data/apache/BIT-apache-2021-34798.json"
          }
        }
      ],
      "modified": "2026-10-16T09:45:02.785966095Z",
      "provider": "osv",
      "references": [
        "https://kc.mcafee.com/corporate/index?page=content&id=SB10379",
        "https://lists.apache.org/thread.html/r3925e167d5eb1c75def3750c155d753064e1d34a143028bb32910432%40%3Cusers.httpd.apache.org%3E",
        "https://lists.apache.org/thread.html/r61fdbfc26ab170f4e6492ef3bd5197c20b862ce156e9d5a54d4b899c%40%3Cusers.httpd.apache.org%3E",
        "https://lists.apache.org/thread.html/r82838efc5fa6fc4c73986399c9b71573589f78b31846aff5bd9b1697%40%3Cusers.httpd.apache.org%3E",
        "https://lists.apache.org/thread.html/r82c077663f9759c7df5a6656f925b3ee4f55fcd33c889ba7cd687029%40%3Cusers.httpd.apache.org%3E",
        "https://lists.debian.org/debian-lts-announce/2021/10/msg00001.html",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/",
        "https://security.gentoo.org/glsa/202208-20",
        "https://security.netapp.com/advisory/ntap-20211008-0004/",
        "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-2.4.49-VWL69sWQ",
        "https://www.debian.org/security/2021/dsa-4982",
        "https://www.oracle.com/security-alerts/cpuapr2022.html",
        "https://www.oracle.com/security-alerts/cpujan2022.html",
        "https://www.tenable.com/security/tns-2021-17",
        "https://nvd.nist.gov/vuln/detail/CVE-2021-34798"
      ],
      "provider_metadata": {
        "cpes": [
          "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*"
        ],
        "severity": "High"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-34798",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/database_specific/severity"
  },
  "source_id": "core-osv",
  "document_id": 338122,
  "published_at": "2024-03-06T10:55:30.698+00:00"
}