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October 13, 2002
Symantec Firewall Secure Webserver timeout DoS


Advanced IT-Security, a Scandinavian security consultancy, notified Symantec of a denial-of-service (D0S) issue they had discovered with the web proxy component in the Symantec Enterprise Firewall. A malicious user who is able to establish a remote connection to the proxy server could, by requesting multiple connections to a non-existent or erroneous internal URL, cause the proxy server to timeout for an extended period of time. While timed out, the server fails to process any subsequent connection requests.

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 Enterprise Firewall 7.0 (Solaris)
Symantec Enterprise Firewall 7.0 (Windows 2000 and NT)
VelociRaptor Model 500/700/1000
VelociRaptor Model 1100/1200/1300
Symantec Gateway Security 5110/5200/5300

Symantec Response
Symantec tested and verified the problem discovered by Advanced IT-Security. This issue has been addressed in the security hotfix bundle currently available for download through the Symantec Enterprise Support Web site.

The following hotfix bundles are applicable for the affected product and version to address this issue:

Symantec Enterprise Firewall V7.0 for Solaris
Hotfix: SG7000-20020819-00 - ftpd httpd nntpd and vpn driver

Symantec Enterprise Firewall V7.0 for Windows NT
Hotfix: SG7000-20020819-00 - ftpd httpd and vpn.sys

Symantec Enterprise Firewall V7.0 for Windows 2000
Hotfix:SG7000-20020819-00 - ftpd httpd and axtvpn.sys

Symantec Gateway Security 5110/5200/5300
Hotfix: SG7000-20020819-00 - ftpd httpd nntpd and vpn driver

Symantec VelociRaptor 1100/1200/1300
Hotfix:SG7000-20020819-00 - ftpd httpd nntpd and vpn driver

Raptor Firewall 6.5.3 for Solaris
Hotfix: SG6503-20020819-00 - httpd nntpd and vpn driver

Symantec VelociRaptor 500/700/1000
SG6501-20020819-00 - 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 VelociRaptor 1.0
SG6500-20020819-01 - httpd nntpd and vpn driver

Raptor Firewall 6.5.0 for Windows NT
Hotfix: SG6500-20020819-00 - httpd and vpn.sys

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.

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.

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

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Last modified on: Monday, 25-Oct-2004 15:00:05 PDT