[NT] Novell Client NWSPOOL.DLL Stack Overflow Vulnerability

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Novell Client NWSPOOL.DLL Stack Overflow Vulnerability
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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 4.91 SP4

Immune Systems:
* Novell Client 4.91 Post-SP4

The specific flaw exists in nwspool.dll which is responsible for handling
RPC requests through the spoolss named pipe. Several RPC functions exposed
by this DLL do not properly verify argument sizes and subsequently copy
user-supplied data to a stack-based buffer resulting in an exploitable
overflow.

Vendor Response:
Novell has issued an update to correct this vulnerability. More details
can be found at:
<http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5005400.html> http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5005400.html

Disclosure Timeline:
2007.02.16 - Vulnerability reported to vendor
2007.07.30 - Digital Vaccine released to TippingPoint customers
2007.08.06 - Coordinated public release of advisory

ADDITIONAL INFORMATION

The information has been provided by <mailto:zdi-disclosures@3com.com>
The Zero Day Initiative (ZDI).
The original article can be found at:
<http://www.zerodayinitiative.com/advisories/ZDI-07-045.html>

http://www.zerodayinitiative.com/advisories/ZDI-07-045.html

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