What’s Vulnerable › Vulnerabilities

CVE-2006-6585

• Severity: medium (CVSS 6.4 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2006-12-15 · updated 2026-06-16

Description

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.

Affected products

• Mozilla Firefox: 2.0, 3.0

References

• http://azurit.elbiahosting.sk/ffsniff/ffsniff-0.2.tar.gz
• http://securityreason.com/securityalert/2046
• http://www.securityfocus.com/archive/1/454058/100/0/threaded
• http://www.securityfocus.com/archive/1/493585/100/0/threaded
• http://azurit.elbiahosting.sk/ffsniff/ffsniff-0.2.tar.gz
• http://securityreason.com/securityalert/2046
• http://www.securityfocus.com/archive/1/454058/100/0/threaded
• http://www.securityfocus.com/archive/1/493585/100/0/threaded

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