October 2005

ID: 00903
Ref: 843/05
Date: 13 October 2005:15:15:40
Version: 1

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Title: AusCERT - Novell NetMail NMAP agent buffer overflow vulnerability (AUSCERT AA-2005.0018)
Abstract:
Vendors affected: Novell
Applications affected: Novell

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Title
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AusCERT - Novell NetMail NMAP agent buffer overflow vulnerability (AUSCERT AA-2005.0018)


Detail
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AA-2005.0018 AUSCERT Advisory

Novell NetMail NMAP agent buffer overflow vulnerability
13 October 2005
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AusCERT Advisory Summary
------------------------

Product: Novell Netmail 3.52c and prior
Operating System: Windows
Linux variants
Novell Netware
Impact: Execute Arbitrary Code/Commands
Access: Remote/Unauthenticated
Member-only until: Thursday, November 10 2005

Ref: ESB-2004.0758

Original Bulletin:
http://support.novell.com/cgi-bin/search/searchtid.cgi?/2972340.htm


OVERVIEW:

The NetMail NMAP agent has a buffer overflow vulnerability when
handling long user names in the USER command.

This can be exploited by an attacker who is able to successfully
authenticate to the NetMail NMAP agent. This may be made easier in
the case where the default NMAP authentication credential has not
been changed, as described in ESB-2004.0758. [4]


IMPACT:

An attacker who can authenticate to the NMAP agent can remotely
execute arbitrary code.


MITIGATION:

NetMail update 3.52D has been released, fixing this vulnerability.
This is available from the Novell TIDs linked to below.

It is also recommended that system administrators ensure a
non-default NMAP authentication credential is set, using the
instructions in [5].


REFERENCES:

[1] Novell TID 2972438 - Windows
http://support.novell.com/cgi-bin/search/searchtid.cgi?/2972438.htm

[2] Novell TID 2972433 - NetWare
http://support.novell.com/cgi-bin/search/searchtid.cgi?/2972433.htm

[3] Novell TID 2972340 - Linux
http://support.novell.com/cgi-bin/search/searchtid.cgi?/2972340.htm

[4] AusCERT ESB-2004.0758
http://www.auscert.org.au/4596

[5] Instructions to set NetMail NMAP authentication credential
http://support.novell.com/cgi-bin/search/searchtid.cgi?/10095545.htm

[6] Secunia Research advisory
http://secunia.com/secunia_research/2005-23/advisory/


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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