ZDI-08-005: Novell Client NWSPOOL.DLL EnumPrinters Stack Overflow

Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-08-005.html

February 11, 2008

-- CVE ID:

CVE-2008-0639

-- Affected Vendor:

Novell

-- Affected Products:

Novell Netware Client

-- TippingPoint(TM) IPS Customer Protection:

TippingPoint IPS customers have been protected against this

vulnerability by Digital Vaccine protection filter ID .

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.

-- Vendor Response:

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:

This vulnerability was discovered by Anonymous and Avosani Gabriele.

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vulnerability are not exposed to any parties until an official vendor

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