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TITLE:
Microsoft Windows win32k.sys Driver "CreateDIBPalette()" Buffer
Overflow

SECUNIA ADVISORY ID:
SA40870

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40870/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40870

RELEASE DATE:
2010-08-06

DISCUSS ADVISORY:
http://secunia.com/advisories/40870/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/40870/

ONLY AVAILABLE IN CUSTOMER AREA:
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https://ca.secunia.com/?page=viewadvisory&vuln_id=40870

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
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http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
Arkon has discovered a vulnerability in Microsoft Windows, which can
be exploited by malicious people to gain escalated privileges.

The vulnerability is caused due to a boundary error in win32k.sys
within the "CreateDIBPalette()" function when copying colour values
into a buffer allocated with a fixed size when creating the DIB
palette. This can be exploited via the "GetClipboardData()" API to
cause a buffer overflow by specifying a large number of colours
(greater than 256) via the "biClrUsed" field in a BITMAPINFOHEADER
structure.

Successful exploitation may allow execution of arbitrary code with
kernel privileges.

The vulnerability is confirmed in fully patched versions of Windows
XP SP3, Windows Server 2003 R2 Enterprise SP2, Windows Vista Business
SP1, Windows 7, and Windows Server 2008 SP2.

SOLUTION:
Grant only access to trusted users.

PROVIDED AND/OR DISCOVERED BY:
Arkon

ORIGINAL ADVISORY:
Arkon:
http://www.ragestorm.net/blogs/?p=255

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

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