Ipswitch Instant Messaging Server Denial of Service Vulnerability
iDefense Security Advisory 07.23.07
Jul 23, 2007
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.
Remote exploitation of a Denial of Service vulnerability in Ipswitch
Inc.'s IM Server daemon allows unauthenticated attackers to crash the
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
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.
iDefense has confirmed the existence of the vulnerability in version
22.214.171.124 of Ipswitch Inc's IM Server. Previous versions are suspected
to be vulnerable.
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.
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
The discoverer of this vulnerability wishes to remain anonymous.
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X. LEGAL NOTICES
Copyright =A9 2007 iDefense, Inc.
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