Some vulnerabilities have been reported in Microsoft Windows, which can be exploited by malicious, local users to cause a DoS (Denial of Service) or gain escalated privileges.
1) Improper validation of the "hbmpItem" member of the MENUITEMINFO structure in the "xxxRealDrawMenuItem()" function in win32k.sys can be exploited to cause a vulnerable system to become unresponsive and restart.
2) An error within the "SfnLOGONNOTIFY()" function in win32k.sys when handling window messages can be exploited to cause a kernel crash or potentially execute arbitrary code in kernel mode by sending a specially crafted 4Ch message to the "DDEMLEvent" window.
3) Memory is not properly allocated by win32k.sys when copying data from user mode, which can be exploited to cause a pool overflow and execute arbitrary code in kernel-mode.
4) Improper validation of input passed from user mode in win32k.sys can be exploited to execute arbitrary code in kernel-mode.
5) Pseudo handles in callback parameters when creating a new window are not properly validated by win32k.sys, which can be exploited to execute arbitrary code in kernel-mode.
Provided and/or discovered by: 1) Der Hersteller nennt Tavis Ormandy, Google.
2) Reported as a DoS by MJ0011. Additional information provided by the vendor.
3,4) The vendor credits Matthieu Suiche, MoonSols.
5) Nicolas Economou, Core Security Technologies.
Original Advisory: MS10-048 (KB2160329):
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Subject: Microsoft Windows win32k.sys Driver Denial of Service and Privilege Escalation
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