Technical Description

A vulnerability has been identified in WinPcap, which could be exploited by local attackers to obtain elevated privileges. This issue is caused by an invalid array indexing within the "bpf_filter_init()" function, which could be exploited by malicious users to cause a memory corruption and execute arbitrary code with kernel privileges via specially crafted IOCTL requests.

Affected Products

WinPcap versions prior to 4.0.2

Solution

Upgrade to WinPcap version 4.0.2 :
http://www.winpcap.org/install/default.htm

References

http://www.vupen.com/english/advisories/2007/3835
http://www.winpcap.org/misc/changelog.htm
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=625

Credits

Vulnerability reported by iDefense Labs.

ChangeLog

2007-11-13 : Initial release

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