[NT] Novell Client NWSPOOL.DLL EnumPrinters Stack Overflow Vulnerability

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Novell Client NWSPOOL.DLL EnumPrinters Stack Overflow Vulnerability
------------------------------------------------------------------------


SUMMARY

A 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.

DETAILS

Vulnerable Systems:
* Novell Client version 4.91 SP2
* Novell Client version 4.91 SP3
* Novell Client version 4.91 SP4

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 Response:
Novell has issued an update to correct this vulnerability. More details
can be found at:
<http://download.novell.com/Download?buildid=SszG22IIugM~>
http://download.novell.com/Download?buildid=SszG22IIugM~

Disclosure Timeline:
2007.12.11 - Vulnerability reported to vendor
2008.02.11 - Coordinated public release of advisory

CVE Information:
<http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0639>
CVE-2008-0639


ADDITIONAL INFORMATION

The information has been provided by <mailto:zdi-disclosures@xxxxxxxx>
The Zero Day Initiative (ZDI).
The original article can be found at:
<http://www.zerodayinitiative.com/advisories/ZDI-08-005.html>
http://www.zerodayinitiative.com/advisories/ZDI-08-005.html



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