(Pwn2Own) Microsoft Windows win32kfull.sys Surface Object Use-After-Free Privilege Escalation Vulnerability
May 10th, 2016
Vulnerability Details
This vulnerability allows local attackers to execute arbitrary code on vulnerable installations of Microsoft Windows. 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 how win32kfull.sys handles reference counting of Surface objects. An attacker can leverage this vulnerability to escalate privileges and execute code with kernel privileges.
Additional Details
Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://technet.microsoft.com/en-us/library/security/ms16-062.aspx
Disclosure Timeline
- 2016-03-12 - Vulnerability reported to vendor
- 2016-05-10 - Coordinated public release of advisory
Credit
360Vulcan
