[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

UNIRAS Brief - 87/04 - eEye Security Bulletin - ZoneLabs SMTP Processing Buffer Overflow



 
-----BEGIN PGP SIGNED MESSAGE-----

- ----------------------------------------------------------------------------------
   UNIRAS (UK Govt CERT) Briefing Notice - 87/04 dated 26.02.04  Time: 10:25  
  UNIRAS is part of NISCC (National Infrastructure Security Co-ordination Centre)
- ---------------------------------------------------------------------------------- 
  UNIRAS material is also available from its website at www.uniras.gov.uk and
         Information about NISCC is available from www.niscc.gov.uk
- ----------------------------------------------------------------------------------

Title
=====

eEye Security Bulletin:

ZoneLabs SMTP Processing Buffer Overflow.

Detail
====== 

ZoneLabs provides a suite of desktop firewall products. Products in this suite such 
as ZoneAlarm analyze incoming and outgoing email messages for malicious or otherwise 
abnormal content. When ZoneAlarm examines outgoing email messages a buffer overflow 
condition is presented when they retrieve the destination email address from the 
message. An attacker can exploit this vulnerability to elevate his privileges to SYSTEM 
on any machine protected by a vulnerable ZoneLabs product. This vulnerability can also 
be exploited remotely if an attacker can manipulate the protected system into sending 
an outgoing email message.


- ----------------------------------------------------------------------------------

ZoneLabs SMTP Processing Buffer Overflow

Release Date:
February 18, 2004

Date Reported:
February 13, 2004

Severity:
Medium (Local Privilege Escalation/Remote Code Execution)

Vendor:
ZoneLabs Inc.
 
Software Affected:
ZoneAlarm 4.0 and above
ZoneAlarm Pro 4.0 and above
ZoneAlarm Plus 4.0 and above
ZoneLabs Integrity client 4.0 and above

Description:
 
ZoneLabs provides a suite of desktop firewall products. Products in this suite such as ZoneAlarm analyze incoming and outgoing email messages for malicious or otherwise abnormal content. When ZoneAlarm examines outgoing email messages a buffer overflow condition is presented when they retrieve the destination email address from the message. An attacker can exploit this vulnerability to elevate his privileges to SYSTEM on any machine protected by a vulnerable ZoneLabs product. This vulnerability can also be exploited remotely if an attacker can manipulate the protected system into sending an outgoing email message.

Technical Description:
 
A stack based buffer overflow vulnerability within vsmon.exe can be exploited to execute code with the context of the SYSTEM account. The vulnerability exists within the component responsible for processing the RCPT TO command argument. By specifying a large argument to the RCPT TO command an internal stack based buffer can be overflowed within the TrueVector Internet Monitor (vsmon.exe) process.

Protection:
Retina Network Security Scanner has been updated to identify this vulnerability.

Vendor Status:
ZoneLabs was contacted and within only a few days they produced an update to eliminate this vulnerability within their products. We would like to give special recognition to the responsiveness of ZoneLabs in creating a fix to protect their customers. 

http://download.zonelabs.com/bin/free/securityAlert/8.html

Credit:
Discovery: Riley Hassell

Related Links:
Retina Network Security Scanner - Free 15 Day Trial http://www.eeye.com/html/Products/Retina/index.html

Greetings:
All the other firewall vendors on our list.

Copyright (c) 1998-2004 eEye Digital Security Permission is hereby granted for the redistribution of this alert electronically. It is not to be edited in any way without express consent of eEye. If you wish to reprint the whole or any part of this alert in any other medium excluding electronic medium, please e-mail alert@xxxxxxxx for permission.

Disclaimer
The information within this paper may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties with regard to this information. In no event shall the author be liable for any damages whatsoever arising out of or in connection with the use or spread of this information. Any use of this information is at the user's own risk.

Feedback
Please send suggestions, updates, and comments to:

eEye Digital Security
http://www.eEye.com
info@xxxxxxxx



- ----------------------------------------------------------------------------------

For additional information or assistance, please contact the HELP Desk by 
telephone or Not Protectively Marked information may be sent via 
EMail to: uniras@xxxxxxxxxxxx

Office Hours:
Mon - Fri: 08:30 - 17:00 Hrs
Tel: +44 (0) 20 7821 1330 Ext 4511
Fax: +44 (0) 20 7821 1686

Outside of Office Hours:
On Call Duty Officer:
Tel: +44 (0) 20 7821 1330 and follow the prompts

- ----------------------------------------------------------------------------------
UNIRAS wishes to acknowledge the contributions of eEye for the information 
contained in this Briefing. 
- ----------------------------------------------------------------------------------
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 
to ensure that you receive the most current information concerning that problem.

Reference to any specific commercial product, process, or service by trade 
name, trademark manufacturer, or otherwise, does not constitute or imply 
its endorsement, recommendation, or favouring by UNIRAS or NISCC.  The views 
and opinions of authors expressed within this notice shall not be used for 
advertising or product endorsement purposes.

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 
with the usage of information contained within this notice.

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. 
- ----------------------------------------------------------------------------------
<End of UNIRAS Briefing>

-----BEGIN PGP SIGNATURE-----
Version: PGP 8.0

iQCVAwUBQD3JYopao72zK539AQEQ2gP+ILRtLuWm5/yt0RRWuR1pZ/S7UjcNjFbW
l9JThzZ+s5j8i/Hdf0CLIwMO5ZJwL6rrzr6JhNBQk+QwmxLSR7VUv59oOBGVEdAZ
lH0Bt9n7bDdH3vqWsqIJlx4kcr6xa3R0bbjtIu/eC1civDa98S1U7pP2aUGZkSsA
CdW7cAvCaII=
=8EZw
-----END PGP SIGNATURE-----