Home / vulnerabilities Secunia Security Advisory 45186
Posted on 13 July 2011
Source : packetstormsecurity.org Link
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TITLE:
Microsoft Windows win32k.sys Driver Multiple Vulnerabilities
SECUNIA ADVISORY ID:
SA45186
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RELEASE DATE:
2011-07-12
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DESCRIPTION:
Multiple vulnerabilities have been reported in Microsoft Windows,
which can be exploited by malicious, local users to disclose
sensitive information or gain escalated privileges.
1) Nine use-after-free errors in the Win32k kernel-mode driver
(win32k.sys) when handling kernel-mode driver objects can be
exploited to dereference already freed memory.
Successful exploitation allows execution of arbitrary code with
kernel-mode privileges.
2) Five NULL pointer dereference errors exist in the Win32k
kernel-mode driver (win32k.sys) when handling pointers to certain
kernel-mode driver objects.
Successful exploitation allows execution of arbitrary code with
kernel-mode privileges.
3) An error in the Win32k kernel-mode driver (win32k.sys) when
validating function parameters can be exploited to disclose data from
any kernel-mode memory location.
SOLUTION:
Apply patches.
Further details available in Customer Area:
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PROVIDED AND/OR DISCOVERED BY:
1, 2) The vendor credits Tarjei Mandt, Norman.
3) The vendor credits Mr. Liang Yin, Prof. Sihan Qing and Weiping
Wen, and Mr. Husheng Zhou, Department of Information Security,
Beijing University.
ORIGINAL ADVISORY:
MS11-054 (KB2555917):
http://www.microsoft.com/technet/security/Bulletin/MS11-054.mspx
OTHER REFERENCES:
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EXTENDED DESCRIPTION:
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EXTENDED SOLUTION:
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EXPLOIT:
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