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AA-2005.013                  AUSCERT Advisory

              Novell eDirectory Authentication Service (NMAS)
                unauthorized password change vulnerability
                               2 August 2005
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        AusCERT Advisory Summary
        ------------------------

Product:           Novell eDirectory 8.7.3 and prior
                   Novell Modular Authentication Service (NMAS) 2.3.7 and prior
Operating System:  Novell NetWare
                   Windows
                   Linux variants
                   Solaris
Impact:            Inappropriate Access
Access:            Remote/Unauthenticated


OVERVIEW:

	The Forgotten Password portal included with Novell eDirectory 
	Authentication Server Modules (NMAS) 2.3.7 and prior may allow a 
	remote attacker to change users' passwords without answering challenge 
	questions.


IMPACT:

	A remote attacker may gain unauthorized access to eDirectory user 
	accounts by changing the passwords, bypassing the password change
	challenge questions. 


MITIGATION:

	Novell has released a patch for NMAS fixing this vulnerability.
	The patch is supported for eDirectory 8.7.3 IR4 and greater, and 
	can be downloaded from the URL below. [1]


REFERENCES:

	[1] Novell TID 2971485
	    http://support.novell.com/cgi-bin/search/searchtid.cgi?/2971485.htm


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

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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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