Trend Micro ServerProtect EarthAgent Remote DoS Vulnerability

iDefense Security Advisory 12.14.05
www.idefense.com/application/poi/display?id=356&type=vulnerabilities 
December 14, 2005

I. BACKGROUND

Trend Micro Inc.'s ServerProtect provides antivirus scanning with
centralized management of virus outbreaks, scanning, patter file
updates, notifications and remote installations. More information about
the product set is available at:

www.trendmicro.com/en/products/file-server/sp/evaluate/overview.htm 

II. DESCRIPTION

Remote exploitation of a denial of service vulnerability in Trend Micro
Inc.'s ServerProtect EarthAgent daemon allow attackers to cause the
target process to consume 100% of available CPU resources.

The problem specifically exists within ServerProtect EarthAgent in the
handling of maliciously crafted packets transmitted with the magic value
"\x21\x43\x65\x87" targeting TCP port 5005. A memory leak also occurs
with each received exploit packet allowing an attacker to exhaust all
available memory resources with repeated attack.

III. ANALYSIS

Successful exploitation of the described vulnerability allows
unauthenticated remote attackers to consume 100% CPU resources,
increasingly consume memory resources and potentially crash the
underlying operating system. Full CPU utilization can be achieved with a
single packet, memory consumption occurs incrementally on subsequent
attacks.

IV. DETECTION

iDefense has confirmed the existence of this vulnerability in Trend
Micro ServerProtect for Windows Management Console 5.58 running with
Trend Micro Control Manager 2.5/3.0 and Trend Micro Damage Cleanup
Server 1.1. It is suspected that earlier versions and versions for other
platforms are vulnerable as well.

V. WORKAROUND

Employ firewalls, access control lists or other TCP/UDP restriction
mechanisms to limit access to vulnerable systems on TCP port 5005.

VI. VENDOR RESPONSE

The vendor has released the following security advisory for this issue:

http://kb.trendmicro.com/solutions/search/main/search/ 
 solutionDetail.asp?solutionID=25254

"Contact Trend Micro Technical Support to request for the
SPNT5.58_HotfixB1137.zip file, which should only be installed on servers
running SPNT 5.58."

VII. CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2005-1928 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org), which standardizes names for 
security problems.

VIII. DISCLOSURE TIMELINE

06/03/2005 Initial vendor notification
06/05/2005 Initial vendor response
12/14/2005 Public disclosure

IX. CREDIT

This vulnerability was discovered by Pedram Amini, OpenRCE
(www.openrce.org). 

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X. LEGAL NOTICES

Copyright =A9 2005 iDefense, Inc.

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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
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or consequential loss or damage arising from use of, or reliance on,
this information.