Mozilla Foundation Security Advisory 2013-59
Title: XrayWrappers can be bypassed to run user
defined methods in a privileged context
Announced: June 25, 2013
Products: Firefox, Thunderbird, Seamonkey
Fixed in: Firefox 22.0
Firefox ESR 17.0.7
Thunderbird ESR 17.0.7
Mozilla security researcher moz_bug_r_a4 reported that
XrayWrappers can be bypassed to call content-defined
valueOf methods through
DefaultValue. This can lead to unexpected behavior when privileged code acts on the incorrect values.
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.