SUMMARY

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

AFFECTED PRODUCTS

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

MITIGATION

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
ftp://ftp.symantec.com/public/updates/security-70s-3des.tar
ftp://ftp.symantec.com/public/updates/security-70s-des.tar

Symantec Enterprise Firewall V7.0 for Windows NT
Hotfix: SG7000-20020819-00 - ftpd httpd and vpn.sys
ftp://ftp.symantec.com/public/updates/security-70wnt-3des.zip
ftp://ftp.symantec.com/public/updates/security-70wnt-des.zip

Symantec Enterprise Firewall V7.0 for Windows 2000
Hotfix:SG7000-20020819-00 - ftpd httpd and axtvpn.sys
ftp://ftp.symantec.com/public/updates/security-70w2k-3des.zip
ftp://ftp.symantec.com/public/updates/security-70w2k-des.zip

Symantec Gateway Security 5110/5200/5300
Hotfix: SG7000-20020819-00 - ftpd httpd nntpd and vpn driver
ftp://ftp.symantec.com/public/updates/security-sgs10-3des.zip

Symantec VelociRaptor 1100/1200/1300
Hotfix:SG7000-20020819-00 - ftpd httpd nntpd and vpn driver
ftp://ftp.symantec.com/public/updates/security-vr15-3des.zip

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 VelociRaptor 500/700/1000
SG6501-20020819-00 - httpd nntpd and vpn driver
ftp://ftp.symantec.com/public/updates/security-vr1-3des.zip
ftp://ftp.symantec.com/public/updates/security-vr1-des.zip

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

Symantec VelociRaptor 1.0
SG6500-20020819-01 - httpd nntpd and vpn driver
ftp://ftp.symantec.com/public/updates/security-vr0-3des.zip
ftp://ftp.symantec.com/public/updates/security-vr0-des.zip

Raptor Firewall 6.5.0 for Windows NT
Hotfix: SG6500-20020819-00 - httpd and vpn.sys
ftp://ftp.symantec.com/public/updates/security-650-3des.zip
ftp://ftp.symantec.com/public/updates/security-650-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.

ACKNOWLEDGEMENTS

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