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Trend Micro ServerProtect Multiple Vulnerabilities (EarthAgent)
------------------------------------------------------------------------
SUMMARY
"
<http://www.trendmicro.com/en/products/file-server/sp/evaluate/overview.htm>
ServerProtect provides comprehensive antivirus scanning for servers, detecting
and removing viruses from files and compressed files in real time -- before
they reach the end user."
Improper packet handling allows attackers to cause a DoS with Trend Micro
ServerProtect EarthAgent making 100% CPU resource. In addition, the use of
old MFC library and the Management Console tool of Trend Micro
ServerProtect allows attackers to execute arbitrary code with the
privileges of the underlying web server and to view content of arbitrary
files on the system with ServerProtect Management Console.
DETAILS
Vulnerable Systems:
* Trend Micro ServerProtect for Windows Management Console version 5.58
running with Trend Micro Control Manager 2.5/3.0 and Trend Micro Damage
Cleanup Server 1.1.
* Microsoft Visual Studio version 6.0
Immune Systems:
* Microsoft Visual Studio version 6.0 SP6
EarthAgent Remote DoS:
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.
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.
Vendor Status:
The vendor has issued a patch fixing the problem: "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."
ServerProtect relay.dll Chunked Overflow:
The problem specifically exists within the relay.dll ISAPI application
upon processing of large POST requests with "wrapped" length values,
because of the use of an old MFC library.
Example:
POST /TVCS/relay.dll HTTP/1.0
Transfer-Encoding: chunked
80000000
[ 50,000 bytes or so ]
The above example request will create an exploitable heap corruption
providing the attacker with a near arbitrary 4-byte overwrite. By
overwriting the address of a soon to be called function the attacker can
seize CPU control and eventually execute arbitrary code.
Successful exploitation of the described issue allows remote attackers to
execute arbitrary code with the privileges of the underlying web server.
Exploitation does not require credentials, thereby exacerbating the impact
of this vulnerability.
isaNVWRequest.dll Chunked Overflow:
The problem specifically exists within the isaNVWRequest.dll ISAPI
application upon processing of large POST requests with "wrapped" length
values, example:
POST /ControlManager/cgi-bin/VA/isaNVWRequest.dll HTTP/1.0
Transfer-Encoding: chunked
80000000
[ 50,000 bytes or so ]
This example request will create an exploitable heap corruption providing
the attacker with a near arbitrary 4-byte overwrite. By overwriting the
address of a soon to be called function, the attacker can seize CPU
control and eventually execute arbitrary code.
Successful exploitation of the described issue allows remote attackers to
execute arbitrary code with the privileges of the underlying web server.
Exploitation does not require credentials, thereby exacerbating
the impact of this vulnerability.
Vendor Status:
The response for both relay.dll Chunked Overflow and isaNVWRequest.dll
Chunked Overflow is:
"Trend Micro has recently become aware of a vulnerability related to the
Microsoft Foundation Classes (MFC) static libraries used by Trend Micro
products to create Internet Server Application Programming Interface
(ISAPI) programs for IIS user interfaces. Under certain heavy load
conditions, the MFC ISAPI produces invalid arguments, which can create an
access violation, and thus a denial of service to users. The original MFC
vulnerability was reported and patched in 2002 by Microsoft, however, in
April 2005, Microsoft published new solutions, and vendors were required
to rebuild programs to link to the new library. During this transition
period, manual solutions are available through Trend Micro technical
support for customers wishing to take precautionary measures, in the
unlikely event of an exploit targeted at the MFC vulnerability.
The potential impact to Trend Micro products is limited to some versions
of InterScan eManager, InterScan Web Protect, OfficeScan, and Control
Manager. Many of these products will be updated in the next version
release.
For now, use the workarounds provided:
Option I: Use the Microsoft URLScan Tool
1. Download any of the following:
Note: The tool prevents a potential thread by rejecting the specified
requests.
* URLScan 2.5 (for IIS 6.0)
* IIS Lockdown Tool 2.1 (for IIS 4.0 or 5.0)
2. Run the URLScan tool. The urlscan folder is automatically created in
the C:\WINDOWS\system32\inetsrv\urlscan directory.
3. Open Windows Explorer and go to the
C:\WINDOWS\system32\inetsrv\urlscan directory.
4. Find the URLScan.ini file and open with a text editor like Notepad.
5. Find the [AllowExtensions] section and add the following file
extensions:
* .exe
* .ini
* .dat
* .asp
6. Find the [DenyHeaders] section and add the transfer-encoding:
parameter.
7. Find the [Options] section and change the value of UseAllowExtensions
to "0".
8. Under [DenyExtensions], remove the following file extensions:
* .exe
* .ini
* .dat
* .asp
9. Save the changes and close the file.
10. Stop and start the Web service.
Option II: Change build environments
Trend Micro recommends changing the build environments to Visual C++ 6.0
with Service Pack 6."
ServerProtect Crystal Reports ReportServer File Disclosure:
The problem specifically exists within the handling of the IMAGE parameter
in the script rptserver.asp. The vulnerable area of code is outlined in
the following snippet:
Set session("oEMF") = Server.CreateObject("CREmfgen.CREmfgen.2")
Call ParseQS()
if IMAGE <> "" then
Call session("oEMF").StreamImage(IMAGE, DEL)
Response.End
end if
An attacker can utilize directory traversal modifiers to traverse outside
the system temporary directory and access any file on the same volume.
Successful exploitation of the described vulnerability allows remote
attackers to view the contents of arbitrary files on the underlying
system. Exploitation does not require credentials thereby exacerbating the
impact of this vulnerability.
Vendor Status:
"Trend Micro has become aware of a vulnerability related to Crystal
Report, a reporting component found in Trend Micro Control Manager (v2.5
and v3.0). Under certain conditions, arbitrary files on the ReportServer
volume inside Trend Micro Control Manager software could be viewed or
accessed remotely. Trend Micro is currently consulting with Crystal Report
regarding permanent solutions to this reporting component. A temporary
workaround solution can be recommended through contacting Trend Micro
customer and technical support."
CVE Information:
<http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-1928>
CVE-2005-1928
<http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-1929>
CVE-2005-1929
<http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-1930>
CVE-2005-1930
Disclosure Timeline:
06/03/2005 - Initial vendor notification
06/05/2005 - Initial vendor response
12/14/2005 - Public disclosure
ADDITIONAL INFORMATION
The information has been provided by iDefense.
The original article can be found at:
<http://www.idefense.com/application/poi/display?id=352&type=vulnerabilities>
http://www.idefense.com/application/poi/display?id=352&type=vulnerabilities,
<http://www.idefense.com/application/poi/display?id=353&type=vulnerabilities>
http://www.idefense.com/application/poi/display?id=353&type=vulnerabilities,
<http://www.idefense.com/application/poi/display?id=354&type=vulnerabilities>
http://www.idefense.com/application/poi/display?id=354&type=vulnerabilities,
<http://www.idefense.com/application/poi/display?id=356&type=vulnerabilities>
http://www.idefense.com/application/poi/display?id=356&type=vulnerabilities
The MFC advisory can be found at:
<http://www.securiteam.com/windowsntfocus/5TP0J0K7PE.html>
http://www.securiteam.com/windowsntfocus/5TP0J0K7PE.html
The Vendor advisory can be found at:
<http://kb.trendmicro.com/solutions/search/main/search/solutionDetail.asp?solutionID=25254>
http://kb.trendmicro.com/solutions/search/main/search/solutionDetail.asp?solutionID=25254
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