Vulnerability CVE-2010-1734
Published: 2010-05-06   Modified: 2012-02-13

Description:
The SfnINSTRING function in win32k.sys in the kernel in Microsoft Windows 2000, XP, and Server 2003 allows local users to cause a denial of service (system crash) via a 0x18d value in the second argument (aka the Msg argument) of a PostMessage function call for the DDEMLEvent window.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
Windows 2000/XP/2003 win32k.sys SfnINSTRING local kernel Denial of Service
th_decoder
07.05.2010

Type:

CWE-20

 (Improper Input Validation)

CVSS2 => (AV:L/AC:L/Au:N/C:N/I:N/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.9/10
6.9/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Complete
Affected software
Microsoft -> Windows 2000 
Microsoft -> Windows 2003 server 
Microsoft -> Windows xp 

 References:
http://vigilance.fr/vulnerability/Windows-denials-of-service-of-win32k-sys-9607
http://www.securityfocus.com/archive/1/510886/100/0/threaded
http://www.securityfocus.com/bid/39631
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