Multiple vulnerabilities have been reported in Microsoft Windows, which can be exploited by malicious, local users to disclose sensitive information, cause a DoS (Denial of Service), and potentially gain escalated privileges and by malicious people to potentially compromise a vulnerable system.
1) An error exists within "win32k.sys" when processing certain objects and can be exploited to cause a crash or execute arbitrary code with the kernel privilege.
This vulnerability is confirmed on a fully patched Windows 7 x86 Professional (win32k.sys version 6.1.7601.18126).
2) An error exists within the "NtUserMessageCall" function (win32k.sys) when handling boolean arguments and can be exploited to gain escalated privileges.
3) An error within the Windows kernel-mode driver (win32k.sys) when handling certain objects can be exploited to gain escalated privileges.
4) An error exists within the Windows kernel-mode driver (win32k.sys) when destroying Dynamic Data Exchange objects within a thread and can be exploited to gain escalated privileges.
Provided and/or discovered by: 1) Tavis Ormandy
2) Jon Butler and Nils, MWR Labs via ZDI
4) An anonymous person via ZDI
The vendor credits:
3) Alexandar Chizhov, Dr.Web
5) Ling Chuan Lee and Lee Yee Chan, F13 Laboratory
6) Yinliang, Tencent PC Manager
7) Mateusz "j00ru" Jurczyk, Google Inc
8) Wen Yujie and Guo Pengfei, Qihoo 360 Security Center
Original Advisory: MS13-053 (KB2850851):
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Subject: Microsoft Windows Kernel Multiple Vulnerabilities
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