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.
Raptor Firewall 6.5 (Windows NT)
Raptor Firewall 6.5.3 (Solaris)
Symantec Enterprise Firewall 6.5.2 (Windows 2000 and NT)
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
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.
Hotfix: SG6503-20020819-00 - httpd nntpd and vpn driver
Symantec Enterprise Firewall 6.5.2 for Windows NT
Hotfix: SG6502-20020819-00 - httpd and vpn.sys
Symantec Enterprise Firewall 6.5.2 for Windows 2000
Hotfix: SG6502-20020819-00 - httpd and axtvpn.sys
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).
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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.
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Last modified on: Monday, 25-Oct-04 22:01:09