Vulnerability from bitnami_vulndb
Published
2024-03-06 10:54
Modified
2025-05-20 10:02
Summary
Possible NULL dereference or SSRF in forward proxy configurations in Apache HTTP Server 2.4.51 and earlier
Details

A crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL pointer dereference) or, for configurations mixing forward and reverse proxy declarations, can allow for requests to be directed to a declared Unix Domain Socket endpoint (Server Side Request Forgery). This issue affects Apache HTTP Server 2.4.7 up to 2.4.51 (included).

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "apache",
        "purl": "pkg:bitnami/apache"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.4.7"
            },
            {
              "fixed": "2.4.52"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-44224"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*"
    ],
    "severity": "High"
  },
  "details": "A crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL pointer dereference) or, for configurations mixing forward and reverse proxy declarations, can allow for requests to be directed to a declared Unix Domain Socket endpoint (Server Side Request Forgery). This issue affects Apache HTTP Server 2.4.7 up to 2.4.51 (included).",
  "id": "BIT-apache-2021-44224",
  "modified": "2025-05-20T10:02:07.006Z",
  "published": "2024-03-06T10:54:18.475Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://httpd.apache.org/security/vulnerabilities_24.html"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2022/May/33"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2022/May/35"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2022/May/38"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2021/12/20/3"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BFSWOH4X77CV7AH7C4RMHUBDWKQDL4YH/"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RGWILBORT67SHMSLYSQZG2NMXGCMPUZO/"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X73C35MMMZGBVPQQCH7LQZUMYZNQA5FO/"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7H26WJ6TPKNWV3QKY4BHKUKQVUTZJTD/"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202208-20"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20211224-0001/"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/kb/HT213255"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/kb/HT213256"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/kb/HT213257"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2022/dsa-5035"
    },
    {
      "type": "WEB",
      "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
    },
    {
      "type": "WEB",
      "url": "https://www.oracle.com/security-alerts/cpujan2022.html"
    },
    {
      "type": "WEB",
      "url": "https://www.tenable.com/security/tns-2022-01"
    },
    {
      "type": "WEB",
      "url": "https://www.tenable.com/security/tns-2022-03"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-44224"
    }
  ],
  "schema_version": "1.5.0",
  "summary": "Possible NULL dereference or SSRF in forward proxy configurations in Apache HTTP Server 2.4.51 and earlier"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.