You are here: Security Center > Mozilla Foundation Security Advisories > MFSA 2013-11

Mozilla Foundation Security Advisory 2013-11

Title: Address space layout leaked in XBL objects
Impact: High
Announced: January 8, 2013
Reporter: Jesse Ruderman
Products: Firefox, Thunderbird, SeaMonkey

Fixed in: Firefox 18.0
  Firefox ESR 10.0.12
  Firefox ESR 17.0.2
  Thunderbird 17.0.2
  Thunderbird ESR 10.0.12
  Thunderbird ESR 17.0.2
  SeaMonkey 2.15


Mozilla security researcher Jesse Ruderman discovered that using the toString function of XBL objects can lead to inappropriate information leakage by revealing the address space layout instead of just the ID of the object. This layout information could potentially be used to bypass ASLR and other security protections.

In general these flaws cannot be exploited through email in the Thunderbird and SeaMonkey products because scripting is disabled, but are potentially a risk in browser or browser-like contexts in those products.