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>> Novell Client for Windows "NWFILTER.SYS" Privilege Escalation Issue

Title : Novell Client for Windows "NWFILTER.SYS" Privilege Escalation Issue
VUPEN ID : VUPEN/ADV-2007-3846
CVE ID : CVE-2007-5667
Rated as : Moderate Risk 
Remotely Exploitable : No
Locally Exploitable : Yes
Release Date : 2007-11-13


Technical Description    Receive VUPEN Security alerts in a Text format  Receive VUPEN Security alerts in a PDF format  Receive VUPEN Security alerts in an XML format  Receive VUPEN Security notifications by SMS 

A vulnerability has been identified in Novell Client for Windows, which could be exploited by local attackers to obtain elevated privileges. This issue is caused by an error within the "NWFILTER.SYS" driver that does not restrict access to "\.\nwfilter", which could be exploited by malicious users to execute arbitrary code with kernel privileges via specially crafted IOCTL requests.

Affected Products

Novell Client for Windows 2000/XP/2003 4.91 Support Pack 4
Novell Client for Windows 2000/XP/2003 4.91 Support Pack 3
Novell Client for Windows 2000/XP/2003 4.91 Support Pack 2
Novell Client for Windows 2000/XP/2003 4.91 Support Pack 1a
Novell Client for Windows 2000/XP/2003 4.91 Support Pack 1

Solution

Apply patch for Novell Client 4.91 SP4 :
http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5006982.html

Apply patch for Novell Client 4.91 SP3 :
http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5006862.html

Apply patch for Novell Client 4.91, 4.91 SP1, 4.91 SP1a and 4.91 SP2 :
http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5006983.html

References

http://www.vupen.com/english/advisories/2007/3846
https://secure-support.novell.com/KanisaPlatform/Publishing/98/3260263_f.SAL_Public.html
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=626

Credits

Vulnerability reported by Stephen Fewer (Harmony Security) via VeriSign iDefense Labs.

ChangeLog

2007-11-13 : Initial release
2007-11-14 : Updated References

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