(Pwn2Own) Apple OS X WindowServer Use-After-Free Privilege Escalation VulnerabilityZDI-16-358: May 26th, 2016
This vulnerability allows local attackers to execute arbitrary code on vulnerable installations of Apple OS X. 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 CFData objects within the WindowServer process. An attacker can cause a CFData object in memory to be reused after it has been freed. An attacker can leverage this vulnerability to execute arbitrary code under the context of the WindowServer.
Vendor ResponseApple has issued an update to correct this vulnerability. More details can be found at:
2016-03-16 - Vulnerability reported to vendor
2016-05-26 - Coordinated public release of advisory
CreditThis vulnerability was discovered by:
Marco Grassi of KeenLab