CVE-2013-0773: Canonical Ubuntu Linux

High severity, CVSS 9.3. EPSS: 2.4% chance of exploitation in the next 30 days.

The Chrome Object Wrapper (COW) and System Only Wrapper (SOW) implementations in Mozilla Firefox before 19.0, Firefox ESR 17.x before 17.0.3, Thunderbird before 17.0.3, Thunderbird ESR 17.x before 17.0.3, and SeaMonkey before 2.16 do not prevent modifications to a prototype, which allows remote attackers to obtain sensitive information from chrome objects or possibly execute arbitrary JavaScript code with chrome privileges via a crafted web site.

Affected products

• Canonical Ubuntu Linux: version 10.04 only; version 11.10 only; version 12.04 only; version 12.10 only
• Debian Debian Linux: version 7.0 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.