iDefense Security Advisory 07.23.07: Ipswitch Instant Messaging Server Denial of Service Vulnerability
Ipswitch Instant Messaging Server Denial of Service Vulnerability
iDefense Security Advisory 07.23.07
http://labs.idefense.com/intelligence/vulnerabilities/
Jul 23, 2007
I. BACKGROUND
Ipswitch Instant Messaging is the instant messaging software that is
included with Ipswitch Collaboration Suite (ICS). ICS is a
collaboration software system that includes email, shared folders, as
well as instant messaging capabilities. More information is available
on the vendor's site at the following URL.
http://www.ipswitch.com/products/instant_messaging/
II. DESCRIPTION
Remote exploitation of a Denial of Service vulnerability in Ipswitch
Inc.'s IM Server daemon allows unauthenticated attackers to crash the
service.
Under default configuration, the IM Server service does not
automatically restart in the event of a failure.
The vulnerable section of code can be reached through any of the
following functions.
DoAttachVideoSender
DoAttachVideoReceiver
DoAttachAudioSender
DoAttachAudioReceiver
III. ANALYSIS
Exploitation allows unauthenticated remote attackers to crash the
service. The service does not auto-restart.
Successful exploitation would lead to a break in IM communications
through the server.
In order to exploit this vulnerability, the attacker must establish a
TCP session with the IM Server service on port 5179. No credentials are
required to reach the vulnerable code.
IV. DETECTION
iDefense has confirmed the existence of the vulnerability in version
2.0.5.30 of Ipswitch Inc's IM Server. Previous versions are suspected
to be vulnerable.
V. WORKAROUND
Employ firewalls, access control lists or other TCP/UDP restriction
mechanisms to limit access to systems and services.
VI. VENDOR RESPONSE
Ipswitch has addressed this vulnerability with the 2.07 release of their
IM Server. More information can be found at the following URL.
http://www.ipswitch.com/support/instant_messaging/patch-upgrades.asp
VII. CVE INFORMATION
A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not
been assigned yet.
VIII. DISCLOSURE TIMELINE
04/27/2007 Initial vendor notification
07/17/2007 Initial vendor response
07/23/2007 Coordinated public disclosure
IX. CREDIT
The discoverer of this vulnerability wishes to remain anonymous.
Get paid for vulnerability research
http://labs.idefense.com/methodology/vulnerability/vcp.php
Free tools, research and upcoming events
http://labs.idefense.com/
X. LEGAL NOTICES
Copyright © 2007 iDefense, Inc.
Permission is granted for the redistribution of this alert
electronically. It may not be edited in any way without the express
written consent of iDefense. If you wish to reprint the whole or any
part of this alert in any other medium other than electronically,
please e-mail customerservice@xxxxxxxxxxxx for permission.
Disclaimer: The information in the advisory is believed to be accurate
at the time of publishing based on currently available information. Use
of the information constitutes acceptance for use in an AS IS condition.
There are no warranties with regard to this information. Neither the
author nor the publisher accepts any liability for any direct,
indirect, or consequential loss or damage arising from use of, or
reliance on, this information.