CVE-2014-1564: Mozilla Firefox

Medium severity, CVSS 4.3. EPSS: 5.5% chance of exploitation in the next 30 days.

Mozilla Firefox before 32.0, Firefox ESR 31.x before 31.1, and Thunderbird 31.x before 31.1 do not properly initialize memory for GIF rendering, which allows remote attackers to obtain sensitive information from process memory via crafted web script that interacts with a CANVAS element associated with a malformed GIF image.

Affected products

• Mozilla Firefox: up to and including 31.1.0; version 30.0 only; version 31.0 only
• Mozilla Thunderbird: version 31.0 only
• Opensuse Evergreen: version 11.4 only
• Opensuse Opensuse: version 12.3 only; version 13.1 only

Published 2014-09-03. Last modified 2026-06-17.