Mozilla Foundation Security Advisory 2012-89
Title: defaultValue security checks not applied
Announced: October 11, 2012
Products: Firefox, Thunderbird, SeaMonkey
Fixed in: Firefox 16.0.1
Firefox ESR 10.0.9
Thunderbird ESR 10.0.9
Mozilla security researcher moz_bug_r_a4 reported a regression where security wrappers are unwrapped without doing a security check in
defaultValue(). This can allow for improper access to the
Location object. In versions 15 and earlier of affected products, there was also the potential for arbitrary code execution.
Security researcher Gareth Heyes also blogged about a Firefox 16 only symptom that is fixed in the updated versions.