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October 13, 2002
Symantec Enterprise Firewall Secure Webserver info leak

Risk
Low

Overview
Advanced IT-Security, a Scandinavian security consultancy, notified Symantec of a potential information leak issue they discovered in the manner in which the web proxy component in the Symantec Enterprise Firewall returned error messages. A remote user connecting to the proxy server can actually perform limited reconnaissance activity against the internal network behind the firewall even though access is restricted by the firewall. By analyzing the unauthorized access error messages returned, the remote user can determine whether the address requested is a valid address or not. In this manner, a limited mapping of the internal network is possible.

Components Affected
Raptor Firewall 6.5 (Windows NT)
Raptor Firewall 6.5.3 (Solaris)
Symantec Enterprise Firewall 6.5.2 (Windows 2000 and NT)

Symantec Response
Symantec verified this issue reported by Advanced IT-Security as an issue that Symantec addressed as a collateral problem in an earlier security update for the Symantec Enterprise Firewall. The Symantec Enterprise Firewall is not vulnerable to this concern if patched fully up-to-date. All patches are available for download through the Symantec Enterprise Support Web site

The following security bundles are the latest security hotfixes for the affected products. If you have not applied the appropriate hotfix for this Info Leak issue, the hotfix bundle indicated below is a cumulative hotfix and contains the appropriate fix for this issue as well.

Raptor Firewall 6.5.3 for Solaris
Hotfix: SG6503-20020819-00 - httpd nntpd and vpn driver
ftp://ftp.symantec.com/public/updates/security-653-3des.tar
ftp://ftp.symantec.com/public/updates/security-653-des.tar

Symantec Enterprise Firewall 6.5.2 for Windows NT
Hotfix: SG6502-20020819-00 - httpd and vpn.sys
ftp://ftp.symantec.com/public/updates/security-652nt-3des.zip
ftp://ftp.symantec.com/public/updates/security-652nt-des.zip

Symantec Enterprise Firewall 6.5.2 for Windows 2000
Hotfix: SG6502-20020819-00 - httpd and axtvpn.sys
ftp://ftp.symantec.com/public/updates/security-652w2k-3des.zip
ftp://ftp.symantec.com/public/updates/security-652w2k-des.zip
As a best practice, Symantec recommends keeping all operating systems and applications updated with the latest vendor patches. Keeping mission-critical systems updated with all security patches applied reduces risk exposure.

Credit
Symantec takes the security and proper functionality of our products very seriously. Symantec appreciates the assistance of Tommy Mikalsen from Advanced IT-Security in identifying this area of concern so we could quickly address it.


Symantec takes the security and proper functionality of our products very seriously. As founding members of the Organization for Internet Safety (OISafety), Symantec supports and follows the principles of responsible disclosure. Symantec also subscribes to the vulnerability disclosure guidelines outlined by the National Infrastructure Advisory Council (NIAC).

Please contact secure@symantec.com if you feel you have discovered a security issue in a Symantec product. A Symantec Product Security team member will contact you regarding your submission. Symantec strongly recommends using encrypted email for reporting vulnerability information to secure@symantec.com. The Symantec Product Security PGP key can be found at the end of this message.

Symantec has developed a Product Vulnerability Response document outlining the process we follow in addressing suspected vulnerabilities in our products. This document is available below.

Symantec-Product-Vulnerability-Response Symantec Vulnerability Response Policy Symantec Product Vulnerability Management PGP Key Symantec Product Vulnerability Management PGP Key


Copyright (c) 2009 by Symantec Corp.
Permission to redistribute this alert electronically is granted as long as it is not edited in any way unless authorized by Symantec Security Response. Reprinting the whole or part of this alert in any medium other than electronically requires permission from secure@symantec.com.

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.

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Last modified on: Monday, 25-Oct-04 22:01:09