GC hazard with default compartments and frame chain restoration

ID MFSA2013-92
Type mozilla
Reporter Mozilla Foundation
Modified 2013-09-17T00:00:00


Security researcher Nils reported a potentially exploitable use-after-free in an early test version of Firefox 25. Mozilla developer Bobby Holley found that the cause was an older garbage collection bug that a more recent change made easier to trigger.

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.