Advisory Details

August 9th, 2016

Microsoft Windows win32k RGNOBJ Integer Overflow Privilege Escalation Vulnerability

CVE ID	CVE-2016-3309
CVSS SCORE	6.9, AV:L/AC:M/Au:N/C:C/I:C/A:C
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Windows
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 RGNOBJ objects. An integer overflow vulnerability occurs when an attacker combines rectangles with special coordinates. An attacker can leverage this vulnerability to escalate privileges and execute code under the context of SYSTEM.
ADDITIONAL DETAILS	Microsoft has issued an update to correct this vulnerability. More details can be found at: https://technet.microsoft.com/library/security/MS16-098
DISCLOSURE TIMELINE	2016-04-27 - Vulnerability reported to vendor 2016-08-09 - Coordinated public release of advisory
CREDIT	bee13oy of CloverSec Labs

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