Use-after-free in Event Listener Manager

Use-after-free in Event Listener Manager

Announced

June 10, 2014

Reporter

Tyson Smith, Jesse Schwartzentruber

Impact

Critical

Products

Firefox, SeaMonkey

Fixed in

• Firefox 30
• SeaMonkey 2.26.1

Description

Security researchers Tyson Smith and Jesse Schwartzentruber of the BlackBerry Security Automated Analysis Team used the Address Sanitizer tool while fuzzing to discover a use-after-free in the event listener manager. This can be triggered by web content and leads to a potentially exploitable crash. This issue was introduced in Firefox 29 and does not affect earlier versions.

References

• heap-use-after-free in nsEventListenerManager::CompileEventHandlerInternal (CVE-2014-1540)