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Mozilla Foundation Security Advisory 2014-38

Buffer overflow when using non-XBL object as XBL

Announced
April 29, 2014
Reporter
Abhishek Arya
Impact
High
Products
Firefox, Firefox ESR, SeaMonkey, Thunderbird
Fixed in
  • Firefox 29
  • Firefox ESR 24.5
  • SeaMonkey 2.26
  • Thunderbird 24.5

Description

Security researcher Abhishek Arya (Inferno) of the Google Chrome Security Team used the Address Sanitizer tool to discover a buffer overflow when a script uses a non-XBL object as an XBL object because the XBL status of the object is not properly validated. The resulting memory corruption is potentially exploitable.

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

References