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Mozilla Foundation Security Advisory 2015-105

Buffer overflow while decoding WebM video

Announced
September 22, 2015
Reporter
Atte Kettunen
Impact
High
Products
Firefox, Firefox ESR, SeaMonkey, Thunderbird
Fixed in
  • Firefox 41
  • Firefox ESR 38.3
  • SeaMonkey 2.38
  • Thunderbird 38.3

Description

Using the Address Sanitizer tool, security researcher Atte Kettunen discovered a buffer overflow in the nestegg library when decoding a WebM format video with maliciously formatted headers. This leads to 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