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UNIRAS Brief - 469/05 - AusCERT - Novell NetMail 3.5.2c and prior - multiple vulnerabilities (AUSCERT AA-2005.009)



 
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   UNIRAS (UK Govt CERT) Briefing Notice - 469/05 dated 22.06.05  Time: 15:58  
  UNIRAS is part of NISCC (National Infrastructure Security Co-ordination Centre)
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  UNIRAS material is also available from its website at www.uniras.gov.uk and
         Information about NISCC is available from www.niscc.gov.uk
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Title
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AusCERT -  Novell NetMail 3.5.2c and prior - multiple vulnerabilities (AUSCERT AA-2005.009)


Detail
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AA-2005.009                  AUSCERT Advisory

        Novell NetMail 3.5.2c and prior - multiple vulnerabilities
                               22 June 2005
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        AusCERT Advisory Summary
        ------------------------

Product:           Novell NetMail 3.5.2c and prior
Operating System:  Linux variants
                   Windows
                   Novell NetWare
Impact:            Cross-site Scripting
                   Execute Arbitrary Code/Commands
Access:            Remote/Unauthenticated
                   Existing Account
CVE Names:         CAN-2005-1756 CAN-2005-1757 CAN-2005-1758
                   CAN-2005-1976


OVERVIEW:

	This bulletin describes four vulnerabilities in Novell Netmail 3.5.2.
	1, 2 and 3 affect versions 3.5.2b and prior on all platforms. 
	Vulnerability 4 affects all versions 3.5.2c and prior on Linux only.

	1. CAN-2005-1756
	   NetMail WebAccess has a cross-site scripting vulnerability that 
	   can be exploited by sending an ical object to a NetMail user. When
	   the appointment is opened, script in the body of the message will be
	   executed.	   

	2. CAN-2005-1757
	   NetMail WebAccess has a buffer overflow vulnerability that can be
	   exploited when a user performs a folder rename and supplies a very
	   long new folder name.

	3. CAN-2005-1758
	   NetMail IMAPD is vulnerable to a heap overflow when a large number
	   of bytes is specified for IMAP command continuation. This can be
	   exploited by unauthenticated remote attackers. 

	4. CAN-2005-1976
	   Incorrect file permissions were set on the NetMail binaries in the 
	   Linux version of NetMail patches 3.5.2a, 3.5.2b and 3.5.2c. This
	   can be exploited by any user on the local machine with UID 500 or
	   membership of group 500.


IMPACT:

	1. An attacker who is able to send an ical object to a NetMail user 
	   can misuse the recipient's authentication credential, performing 
	   any action on the NetMail connection that the recipient could 
	   perform.

	2. An existing NetMail user can potentially execute arbitrary code
	   on the server.

	3. An unauthenticated remote attacker can potentially execute 
	   arbitrary code on the NetMail server.

	4. A local user with UID 500 or member of group 500 can replace the 
	   NetMail binaries, and thereby execute arbitrary code on the server.


MITIGATION:

	Netmail 3.5.2c1 incorporates fixes for all four vulnerabilities. [3]


REFERENCES:

	[1] Novell TID 10098022
	    http://support.novell.com/cgi-bin/search/searchtid.cgi?/10098022.htm

	[2] Novell TID 10097957
	    http://support.novell.com/cgi-bin/search/searchtid.cgi?/10097957.htm

	[3] Novell NetMail 3.5 Patches
	    http://support.novell.com/filefinder/19357/index.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@xxxxxxxxxxxxxx
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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UNIRAS wishes to acknowledge the contributions of AusCERT for the information 
contained in this Briefing. 
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This Briefing contains the information released by the original author. Some 
of the information may have changed since it was released. If the vulnerability 
affects you, it may be prudent to retrieve the advisory from the canonical site 
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Reference to any specific commercial product, process, or service by trade 
name, trademark manufacturer, or otherwise, does not constitute or imply 
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and opinions of authors expressed within this notice shall not be used for 
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Neither UNIRAS or NISCC shall also accept responsibility for any errors 
or omissions contained within this briefing notice. In particular, they shall 
not be liable for any loss or damage whatsoever, arising from or in connection 
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UNIRAS is a member of the Forum of Incident Response and Security Teams (FIRST) 
and has contacts with other international Incident Response Teams (IRTs) in 
order to foster cooperation and coordination in incident prevention, to prompt 
rapid reaction to incidents, and to promote information sharing amongst its 
members and the community at large. 
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<End of UNIRAS Briefing>

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