CVE-2013-0778: Canonical Ubuntu Linux

High severity, CVSS 9.3. EPSS: 4% chance of exploitation in the next 30 days.

The ClusterIterator::NextCluster function in Mozilla Firefox before 19.0, Thunderbird before 17.0.3, and SeaMonkey before 2.16 allows remote attackers to execute arbitrary code or cause a denial of service (out-of-bounds read) via unspecified vectors.

Affected products

• Canonical Ubuntu Linux: version 10.04 only; version 11.10 only; version 12.04 only; version 12.10 only
• Mozilla Firefox: before 17.0.3 (fixed in 17.0.3); before 19.0 (fixed in 19.0)
• Mozilla Seamonkey: before 2.16 (fixed in 2.16)
• Mozilla Thunderbird: before 17.0.3 (fixed in 17.0.3)
• Mozilla Thunderbird ESR: before 17.0.3 (fixed in 17.0.3)
• Opensuse Opensuse: version 11.4 only; version 12.1 only; version 12.2 only

Published 2013-02-19. Last modified 2026-06-16.