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apache2 — security advisory

Type: advisorySources: OSVAdvisory ID: DEBIAN-CVE-2002-0840

Cross-site scripting (XSS) vulnerability in the default error page of Apache 2.0 before 2.0.43, and 1.3.x up to 1.3.26, when UseCanonicalName is "Off" and support for wildcard DNS is present, allows remote attackers to execute script as other web page visitors via the Host: header, a different vulnerability than CAN-2002-1157.

Products
apache2
Affected versions
Not specified
Fixed versions
2.0.43-1
CVEs
CVE-2002-0840
Confirmed fixed CVEs
Not specified
Updated in this feed
31 Oct 2026, 20:11 UTC · Revision 1

Source evidence

DEBIAN-CVE-2002-0840

core-osv · Original source

Published 11 Oct 2002, 04:00 UTC

Cross-site scripting (XSS) vulnerability in the default error page of Apache 2.0 before 2.0.43, and 1.3.x up to 1.3.26, when UseCanonicalName is "Off" and support for wildcard DNS is present, allows remote attackers to execute script as other web page visitors via the Host: header, a different vulnerability than CAN-2002-1157.

osv:DEBIAN-CVE-2002-0840

apache2

Fixed versions: 2.0.43-1

apache2

Fixed versions: 2.0.43-1

apache2

Fixed versions: 2.0.43-1

Complete source record
{
  "id": "6e1915aabd8efb86f89511878c6985a3dbd04ee486acb1acfefc47bfc384811a",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2002-0840",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2002-0840",
    "summary": "Cross-site scripting (XSS) vulnerability in the default error page of Apache 2.0 before 2.0.43, and 1.3.x up to 1.3.26, when UseCanonicalName is \"Off\" and support for wildcard DNS is present, allows remote attackers to execute script as other web page visitors via the Host: header, a different vulnerability than CAN-2002-1157.",
    "evidence": "osv:DEBIAN-CVE-2002-0840",
    "products": [
      {
        "name": {
          "value": "apache2",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.0.43-1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "apache2",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.0.43-1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "apache2",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.0.43-1",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "DEBIAN-CVE-2002-0840",
      "aliases": [
        "DEBIAN-CVE-2002-0840"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.0.43-1"
                }
              ]
            }
          ],
          "package": {
            "name": "apache2",
            "purl": "pkg:deb/debian/apache2?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2002-0840.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.0.43-1"
                }
              ]
            }
          ],
          "package": {
            "name": "apache2",
            "purl": "pkg:deb/debian/apache2?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2002-0840.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.0.43-1"
                }
              ]
            }
          ],
          "package": {
            "name": "apache2",
            "purl": "pkg:deb/debian/apache2?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2002-0840.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-22T23:47:22.657117565Z",
      "provider": "osv",
      "upstream": [
        "CVE-2002-0840"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2002-0840"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2002-0840",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 410364,
  "published_at": "2002-10-11T04:00:00+00:00"
}