CVE-2007-0009: Canonical Ubuntu Linux

Medium severity, CVSS 6.8. EPSS: 50.6% chance of exploitation in the next 30 days.

Stack-based buffer overflow in the SSLv2 support in Mozilla Network Security Services (NSS) before 3.11.5, as used by Firefox before 1.5.0.10 and 2.x before 2.0.0.2, Thunderbird before 1.5.0.10, SeaMonkey before 1.0.8, and certain Sun Java System server products before 20070611, allows remote attackers to execute arbitrary code via invalid "Client Master Key" length values.

Affected products

• Canonical Ubuntu Linux: version 5.10 only; version 6.06 only; version 6.10 only
• Debian Debian Linux: version 3.1 only; version 4.0 only
• Mozilla Firefox: from 1.5, before 1.5.0.10 (fixed in 1.5.0.10); from 2.0, before 2.0.0.2 (fixed in 2.0.0.2)
• Mozilla Network Security Services: before 3.11.5 (fixed in 3.11.5)
• Mozilla Seamonkey: before 1.0.8 (fixed in 1.0.8)
• Mozilla Thunderbird: before 1.5.0.10 (fixed in 1.5.0.10)

Published 2007-02-26. Last modified 2026-06-16.