CVE-2008-5502: Canonical Ubuntu Linux

Medium severity, CVSS 5.0. EPSS: 2.3% chance of exploitation in the next 30 days.

The layout engine in Mozilla Firefox 3.x before 3.0.5, Thunderbird 2.x before 2.0.0.19, and SeaMonkey 1.x before 1.1.14 allows remote attackers to cause a denial of service (crash) via vectors that trigger memory corruption, related to the GetXMLEntity and FastAppendChar functions.

Affected products

• Canonical Ubuntu Linux: version 8.04 only; version 8.10 only
• Mozilla Firefox: from 2.0, before 2.0.0.19 (fixed in 2.0.0.19); from 3.0, before 3.0.5 (fixed in 3.0.5)
• Mozilla Seamonkey: from 1.0, before 1.1.14 (fixed in 1.1.14)

Published 2008-12-17. Last modified 2026-06-16.