Novell Client for Windows NWFILTER.SYS privilege escalation
| novell-client-nwfilter-privilege-escalation (38434) |  High Risk |
Description:
Novell Client for Windows could allow a local attacker to gain elevated privileges on the system, caused by improper validation of user-supplied input in the NWFILTER.SYS driver. By sending a specially-crafted IOCTL request using a METHOD_NEITHER buffering mode, an attacker could exploit this vulnerability to execute arbitrary code on the system with kernel level privileges.
Platforms Affected:
- Novell, Client 4.91 SP4
- Novell, Client 4.91 SP2
- Novell, Client 4.91 SP1a
- Novell, Client 4.91 SP3
Remedy:
Refer to Novell Security Alert 3260263 for patch, upgrade, or suggested workaround information. See References.
Consequences:
Gain Privileges
References:
- iDefense Labs PUBLIC ADVISORY: 11.12.07, Novell NetWare Client NWFILTER.SYS Local Privilege Escalation Vulnerability at http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=626.
- Novell Security Alert 3260263, Architectural and security problems with NWFILTER.SYS at https://secure-support.novell.com/KanisaPlatform/Publishing/98/3260263_f.SAL_Public.html.
- BID-26420: Novell Client for Windows NWFILTER.SYS Local Privilege Escalation Vulnerability
- CVE-2007-5667: NWFILTER.SYS in Novell Client 4.91 SP 1 through SP 4 for Windows 2000, XP, and Server 2003 makes the \.\nwfilter device available for arbitrary user-mode input via METHOD_NEITHER IOCTLs, which allows local users to gain privileges by passing a kernel address as an argument and overwriting kernel memory locations.
- FrSIRT/ADV-2007-3846: Novell Client for Windows NWFILTER.SYS Privilege Escalation Issue
- SA27678: Novell Client NWFILTER.SYS Privilege Escalation Vulnerability
- SECTRACK ID: 1018943: Novell Client Lets Local Users Gain Kernel Level Privileges
Reported:
Nov 12, 2007
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