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Mozilla Foundation Security Advisory 2015-48

Buffer overflow with SVG content and CSS

Announced
May 12, 2015
Reporter
Atte Kettunen
Impact
Critical
Products
Firefox, Firefox ESR, Firefox OS, SeaMonkey, Thunderbird
Fixed in
  • Firefox 38
  • Firefox ESR 31.7
  • Firefox OS 2.2
  • SeaMonkey 2.35
  • Thunderbird 31.7
  • Thunderbird 38.0.1

Description

Using the Address Sanitizer tool, security researcher Atte Kettunen found a buffer overflow during the rendering of SVG format graphics when combined with specific CSS properties on a page. This results in a potentially exploitable crash.

In general this flaw cannot be exploited through email in the Thunderbird product because scripting is disabled, but is potentially a risk in browser or browser-like contexts.

References