Advisory Details

February 11th, 2008

Novell Client NWSPOOL.DLL EnumPrinters Stack Overflow Vulnerability

ZDI-08-005
ZDI-CAN-266

CVE ID CVE-2008-0639
CVSS SCORE
AFFECTED VENDORS Novell
AFFECTED PRODUCTS Netware
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 5262, 5266. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on systems with vulnerable installations of the Novell Netware Client. Authentication is not required to exploit this vulnerability.

The specific flaw exists in nwspool.dll which is responsible for handling RPC requests through the spoolss named pipe. The EnumPrinters function exposed by this DLL contains a logical flaw allowing an attacker to bypass a patch introduced to prevent the vulnerability described in ZDI-07-045. Exploitation of this vulnerability leads to arbitrary code execution in the context of the SYSTEM user.

ADDITIONAL DETAILS Novell has issued an update to correct this vulnerability. More details can be found at:
http://download.novell.com/Download?buildid=SszG22IIugM~
DISCLOSURE TIMELINE
  • 2007-12-11 - Vulnerability reported to vendor
  • 2008-02-11 - Coordinated public release of advisory
CREDIT Anonymous and Avosani Gabriele
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