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TITLE:
WinPcap NPF.SYS IOCTL Handler Privilege Escalation Vulnerability

SECUNIA ADVISORY ID:
SA25982

VERIFY ADVISORY:
http://secunia.com/advisories/25982/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

SOFTWARE:
WinPcap 4.x
http://secunia.com/product/13899/

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

Insufficient address space verification within the IOCTL 9031
(BIOCGSTATS) handler in NPF.SYS can be exploited to overwrite
arbitrary memory and execute code with kernel privileges via
specially crafted IRP parameters passed to the affected IOCTL
handler.

The vulnerability is reported in version 4.0 included in Wireshark
version 0.99.5. Other versions may also be affected.

SOLUTION:
Update to version 4.0.1.
http://www.winpcap.org/install/default.htm

PROVIDED AND/OR DISCOVERED BY:
Discovered by Mario Ballano Bárcena, 48bits.com and reported via
iDefense Labs.

ORIGINAL ADVISORY:
WinPcap:
http://www.winpcap.org/misc/changelog.htm

iDefense Labs:
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=550

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