Novell Client NWSPOOL.DLL EnumPrinters Stack Overflow VulnerabilityZDI-08-005: February 11th, 2008
TippingPoint™ IPS Customer ProtectionTippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 5262, 5266. For further product information on the TippingPoint IPS:
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.
Vendor ResponseNovell has issued an update to correct this vulnerability. More details can be found at:
2007-12-11 - Vulnerability reported to vendor
2008-02-11 - Coordinated public release of advisory
CreditThis vulnerability was discovered by:
Anonymous and Avosani Gabriele