UnratedFix available

thunderbird — security advisory

Type: advisorySources: OSVAdvisory ID: DEBIAN-CVE-2006-4253

Concurrency vulnerability in Mozilla Firefox 1.5.0.6 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via multiple Javascript timed events that load a deeply nested XML file, followed by redirecting the browser to another page, which leads to a concurrency failure that causes structures to be freed incorrectly, as demonstrated by (1) ffoxdie and (2) ffoxdie3. NOTE: it has been reported that Netscape 8.1 and K-Meleon 1.0.1 are also affected by ffoxdie. Mozilla confirmed to CVE that ffoxdie and ffoxdie3 trigger the same underlying vulnerability. NOTE: it was later reported that Firefox 2.0 RC2 and 1.5.0.7 are also affected.

Products: thunderbird
Affected versions: Not specified
Fixed versions: 1.5.0.7-1
CVEs: CVE-2006-4253
Confirmed fixed CVEs: Not specified
Updated in this feed: 31 Oct 2026, 20:09 UTC · Revision 1

Source evidence

DEBIAN-CVE-2006-4253

core-osv · Original source

Published 21 Aug 2006, 20:04 UTC

osv:DEBIAN-CVE-2006-4253

thunderbird

Fixed versions: 1.5.0.7-1

thunderbird

Fixed versions: 1.5.0.7-1

thunderbird

Fixed versions: 1.5.0.7-1

Complete source record

{
  "id": "114da34bdc5d3a9286d7cbb7f3450394d68d28999c5fe793876248efccbacad6",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2006-4253",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2006-4253",
    "summary": "Concurrency vulnerability in Mozilla Firefox 1.5.0.6 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via multiple Javascript timed events that load a deeply nested XML file, followed by redirecting the browser to another page, which leads to a concurrency failure that causes structures to be freed incorrectly, as demonstrated by (1) ffoxdie and (2) ffoxdie3. NOTE: it has been reported that Netscape 8.1 and K-Meleon 1.0.1 are also affected by ffoxdie. Mozilla confirmed to CVE that ffoxdie and ffoxdie3 trigger the same underlying vulnerability. NOTE: it was later reported that Firefox 2.0 RC2 and 1.5.0.7 are also affected.",
    "evidence": "osv:DEBIAN-CVE-2006-4253",
    "products": [
      {
        "name": {
          "value": "thunderbird",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.5.0.7-1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "thunderbird",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.5.0.7-1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "thunderbird",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.5.0.7-1",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "DEBIAN-CVE-2006-4253",
      "aliases": [
        "DEBIAN-CVE-2006-4253"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.5.0.7-1"
                }
              ]
            }
          ],
          "package": {
            "name": "thunderbird",
            "purl": "pkg:deb/debian/thunderbird?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2006-4253.json"
          },
          "ecosystem_specific": {
            "urgency": "low"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.5.0.7-1"
                }
              ]
            }
          ],
          "package": {
            "name": "thunderbird",
            "purl": "pkg:deb/debian/thunderbird?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2006-4253.json"
          },
          "ecosystem_specific": {
            "urgency": "low"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.5.0.7-1"
                }
              ]
            }
          ],
          "package": {
            "name": "thunderbird",
            "purl": "pkg:deb/debian/thunderbird?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2006-4253.json"
          },
          "ecosystem_specific": {
            "urgency": "low"
          }
        }
      ],
      "modified": "2026-10-22T23:47:19.434338590Z",
      "provider": "osv",
      "upstream": [
        "CVE-2006-4253"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2006-4253"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2006-4253",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 410203,
  "published_at": "2006-08-21T20:04:00+00:00"
}