Mozilla Firefox DirectionalityUtils Use-After-Free Remote Code Execution Vulnerability

2015-02-23T00:00:00
ID ZDI-14-427
Type zdi
Reporter regenrecht
Modified 2015-11-09T00:00:00

Description

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Mozilla 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 the handling of bi-directional unicode text. The issue lies in the failure to properly handle text that has its bi-directional character type changed. An attacker can leverage this vulnerability to execute code under the context of the current process.