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firefox-esr — security advisory

Type: advisorySources: OSVAdvisory ID: DEBIAN-CVE-2006-6585

The Extensions manager in Mozilla Firefox 2.0 does not properly populate the list of local extensions, which allows attackers to construct an extension that hides itself by finding its name in the list and then calling RemoveElement, as demonstrated by the FFsniFF extension. NOTE: it was later reported that 3.0 is also affected.

Products
firefox-esr
Affected versions
Not specified
Fixed versions
45.0esr-1
CVEs
CVE-2006-6585
Confirmed fixed CVEs
Not specified
Updated in this feed
31 Oct 2026, 20:12 UTC · Revision 1

Source evidence

DEBIAN-CVE-2006-6585

core-osv · Original source

Published 15 Dec 2006, 19:28 UTC

The Extensions manager in Mozilla Firefox 2.0 does not properly populate the list of local extensions, which allows attackers to construct an extension that hides itself by finding its name in the list and then calling RemoveElement, as demonstrated by the FFsniFF extension. NOTE: it was later reported that 3.0 is also affected.

osv:DEBIAN-CVE-2006-6585

firefox-esr

Fixed versions: 45.0esr-1

firefox-esr

Fixed versions: 45.0esr-1

firefox-esr

Fixed versions: 45.0esr-1

Complete source record
{
  "id": "d1380fb21c15c89b7f89ff126d2dfee5fbb3b63d7edb22201bbcfe801b5a9be7",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2006-6585",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2006-6585",
    "summary": "The Extensions manager in Mozilla Firefox 2.0 does not properly populate the list of local extensions, which allows attackers to construct an extension that hides itself by finding its name in the list and then calling RemoveElement, as demonstrated by the FFsniFF extension. NOTE: it was later reported that 3.0 is also affected.",
    "evidence": "osv:DEBIAN-CVE-2006-6585",
    "products": [
      {
        "name": {
          "value": "firefox-esr",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "45.0esr-1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "firefox-esr",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "45.0esr-1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "firefox-esr",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "45.0esr-1",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "DEBIAN-CVE-2006-6585",
      "aliases": [
        "DEBIAN-CVE-2006-6585"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "45.0esr-1"
                }
              ]
            }
          ],
          "package": {
            "name": "firefox-esr",
            "purl": "pkg:deb/debian/firefox-esr?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2006-6585.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "45.0esr-1"
                }
              ]
            }
          ],
          "package": {
            "name": "firefox-esr",
            "purl": "pkg:deb/debian/firefox-esr?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2006-6585.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "45.0esr-1"
                }
              ]
            }
          ],
          "package": {
            "name": "firefox-esr",
            "purl": "pkg:deb/debian/firefox-esr?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2006-6585.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-22T23:47:24.111131355Z",
      "provider": "osv",
      "upstream": [
        "CVE-2006-6585"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2006-6585"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2006-6585",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 410431,
  "published_at": "2006-12-15T19:28:00+00:00"
}