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TITLE:
Macrovision SafeDisc secdrv.sys Privilege Escalation

SECUNIA ADVISORY ID:
SA27285

VERIFY ADVISORY:
http://secunia.com/advisories/27285/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

OPERATING SYSTEM:
Microsoft Windows XP Home Edition
http://secunia.com/product/16/
Microsoft Windows XP Professional
http://secunia.com/product/22/
Microsoft Windows Server 2003 Datacenter Edition
http://secunia.com/product/1175/
Microsoft Windows Server 2003 Enterprise Edition
http://secunia.com/product/1174/
Microsoft Windows Server 2003 Standard Edition
http://secunia.com/product/1173/
Microsoft Windows Server 2003 Web Edition
http://secunia.com/product/1176/

SOFTWARE:
Macrovision SafeDisc 4.x
http://secunia.com/product/16254/

DESCRIPTION:
A vulnerability has been reported in Macrovision SafeDisc, which can
be exploited by malicious, local users to gain escalated privileges.

The vulnerability is caused due to an input validation error within
secdrv.sys when handling arguments passed to certain IOCTL handlers.
This can be exploited to e.g. overwrite arbitrary kernel memory and
execute arbitrary code with SYSTEM privileges.

The vulnerability is reported in secdrv.sys installed by default in
Windows XP and Windows 2003.

SOLUTION:
Grant only trusted users access to the system.

PROVIDED AND/OR DISCOVERED BY:
Reported as a 0-day.

Additional information by Ruben Santamarta and Mario Ballano.

OTHER REFERENCES:
Symantec:
http://www.symantec.com/enterprise/security_response/weblog/2007/10/privilege_escalation_exploit_i.html

Reversemode:
http://www.reversemode.com/index.php?option=com_mamblog&Itemid=15&task=show&action=view&id=43&Itemid=15

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