---------------------------------------------------------------------- 2003: 2,700 advisories published 2004: 3,100 advisories published 2005: 4,600 advisories published 2006: 5,300 advisories published How do you know which Secunia advisories are important to you? The Secunia Vulnerability Intelligence Solutions allows you to filter and structure all the information you need, so you can address issues effectively. Get a free trial of the Secunia Vulnerability Intelligence Solutions: http://corporate.secunia.com/how_to_buy/38/vi/?ref=secadv ---------------------------------------------------------------------- TITLE: Novell Client NWFILTER.SYS Privilege Escalation Vulnerability SECUNIA ADVISORY ID: SA27678 VERIFY ADVISORY: http://secunia.com/advisories/27678/ CRITICAL: Less critical IMPACT: Privilege escalation WHERE: Local system REVISION: 1.1 originally posted 2007-11-13 SOFTWARE: Novell Client for Windows NT/2000/XP 4.x http://secunia.com/product/1516/ DESCRIPTION: A vulnerability has been reported in Novell Client, which can be exploited by malicious, local users to gain escalated privileges. Insufficient address space verification within the IOCTL handlers of the NWFILTER.SYS device driver and insecure permissions on the "\.\nwfilter" device can be exploited e.g. to access certain IOCTL handlers and overwrite arbitrary memory, and execute code with kernel privileges. The vulnerability affects version 4.91 Support Pack 1 to Support Pack 4 and is reported in nwfilter.sys in file version 4.91.1.1. SOLUTION: The vendor has provided a package, which disables the NWFILTER.SYS driver. Please see the vendor's advisory for more details. Novell Client 4.91 SP4 (491psp4_nwfilter.zip): http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5006982.html Novell Client 4.91 SP3 (491psp3_nwfilter.zip): http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5006862.html Novell Client 4.91, 4.91 SP1, 4.91 SP1a and 4.91 SP2 (491presp3_nwfilter.zip): http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5006983.html PROVIDED AND/OR DISCOVERED BY: Stephen Fewer of Harmony Security, reported via iDefense Labs. CHANGELOG: 2007-11-14: Updated "Description" and added link to iDefense Labs. ORIGINAL ADVISORY: Novell: https://secure-support.novell.com/KanisaPlatform/Publishing/98/3260263_f.SAL_Public.html iDefense: http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=626 ---------------------------------------------------------------------- About: This Advisory was delivered by Secunia as a free service to help everybody keeping their systems up to date against the latest vulnerabilities. Subscribe: http://secunia.com/secunia_security_advisories/ Definitions: (Criticality, Where etc.) http://secunia.com/about_secunia_advisories/ Please Note: Secunia recommends that you verify all advisories you receive by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor. ---------------------------------------------------------------------- Unsubscribe: Secunia Security Advisories http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org ----------------------------------------------------------------------