Advisory Details

July 26th, 2013

(Pwn2Own) Microsoft Windows NtUserMessageCall Privilege Escalation Vulnerability

CVE ID	CVE-2013-1300
CVSS SCORE	6.9, AV:L/AC:M/Au:N/C:C/I:C/A:C
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Windows 7
VULNERABILITY DETAILS	This vulnerability allows remote 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 NtUserMessageCall. The issue lies in the handling of boolean arguments. An attacker can leverage this vulnerability to raise 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/en-us/security/bulletin/ms13-053
DISCLOSURE TIMELINE	2013-03-30 - Vulnerability reported to vendor 2013-07-26 - Coordinated public release of advisory
CREDIT	Nils and Jon of MWR Labs

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