(Pwn2Own) Apple Safari TextTrack Object Use-After-Free Remote Code Execution Vulnerability

ID ZDI-16-342
Type zdi
Reporter lokihardt
Modified 2016-11-09T00:00:00


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Apple Safari. 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 way Safari manages the lifetime of TextTrack objects. By manipulating a document's elements an attacker can force a dangling pointer to be reused after it has been freed. An attacker can leverage this vulnerability to execute arbitrary code under the context of the current process.