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AA-2007.0061                  AUSCERT Advisory

                                   [Win]
          Novell Client NWSPOOL.DLL buffer overflow vulnerability
                               27 July 2007
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        AusCERT Advisory Summary
        ------------------------

Product:              Novell Client 4.91 SP4 and prior
Operating System:     Windows
Impact:               Execute Arbitrary Code/Commands
Access:               Remote/Unauthenticated
Member content until: Friday, August 24 2007

Revision History:  August 7 2007: 3Com ZDI advisory now public
                    July 27 2007: Initial Release


OVERVIEW:

	The Novell Client on Windows is vulnerable to buffer overflows 
	in the NWSPOOL.DLL module, which runs on the client listening
	for RPC requests. Multiple RPC functions are affected.


IMPACT:

	A remote unauthenticated attacker who can send a malicious request 
	to a client computer may execute arbitrary code compromising the 
	systems that have the Novell client installed. 


MITIGATION:

	Novell has released patches fixing this vulnerability: Novell Client 
	4.91 Post-SP4 and 4.91 Post-SP3 Field Test Files [1][2].


REFERENCES:

	[1] Novell Client 4.91 Post-SP4 NWSPOOL.DLL FTF
	    http://download.novell.com/Download?buildid=35u0-_z6wT8~

	[2] Novell Client 4.91 Post-SP3 NWSPOOL.DLL FTF
	    http://download.novell.com/Download?buildid=Z2nNIsn3wjo~

	[3] 3Com ZDI Advisory - ZDI-07-045
	    http://www.zerodayinitiative.com/advisories/ZDI-07-045.html


AusCERT has made every effort to ensure that the information contained
in this document is accurate.  However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.

If you believe that your computer system has been compromised or attacked in 
any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:

        http://www.auscert.org.au/render.html?it=3192

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
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