Mozilla Firefox JSON.stringify Dangling Pointer Remote Code Execution Vulnerability

2011-03-02T00:00:00
ID ZDI-11-103
Type zdi
Reporter regenrecht
Modified 2011-11-09T00:00:00

Description

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Firefox. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within js3250.dll. In the JSON.stringify() call chain js_HasOwnProperty() is called with an invalid pointer. The pointer becomes invalid due to being unrooted and garbage collection occurring. Dereferecing of this pointer allows a remote attacker to execute arbitrary code in the context of the user running the browser.