CVE-2014-1524: Canonical Ubuntu Linux

Critical severity, CVSS 9.8. EPSS: 7.7% chance of exploitation in the next 30 days.

The nsXBLProtoImpl::InstallImplementation function in Mozilla Firefox before 29.0, Firefox ESR 24.x before 24.5, Thunderbird before 24.5, and SeaMonkey before 2.26 does not properly check whether objects are XBL objects, which allows remote attackers to execute arbitrary code or cause a denial of service (buffer overflow) via crafted JavaScript code that accesses a non-XBL object as if it were an XBL object.

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 12.10 only; version 13.10 only; version 14.04 only
• Debian Debian Linux: version 7.0 only; version 8.0 only
• Fedoraproject Fedora: version 19 only; version 20 only
• Mozilla Firefox: before 29.0 (fixed in 29.0); from 24.0, before 24.5 (fixed in 24.5)
• Mozilla Seamonkey: before 2.26 (fixed in 2.26)
• Mozilla Thunderbird: before 24.5 (fixed in 24.5)
• Opensuse Opensuse: version 11.4 only; version 12.3 only; version 13.1 only
• Red Hat Enterprise Linux Desktop: version 5.0 only; version 6.0 only
• Red Hat Enterprise Linux Eus: version 6.5 only
• Red Hat Enterprise Linux Server: version 5.0 only; version 6.0 only
• Red Hat Enterprise Linux Server Aus: version 6.5 only
• Red Hat Enterprise Linux Server Eus: version 6.5 only
• Red Hat Enterprise Linux Server Tus: version 6.5 only
• Red Hat Enterprise Linux Workstation: version 5.0 only; version 6.0 only
• Suse Suse Linux Enterprise Server: version 10 only; version 11 only

Published 2014-04-30. Last modified 2026-06-17.