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June 21, 2004
Symantec Gateway Security Products DNS Cache Poisoning Vulnerability

Revision History

Risk Impact

Symantec resolved a DNS cache poisoning vulnerability that was reported to impact the Symantec Gateway Security products noted below. Under specific conditions and configurations, incorrect or false DNS records could be inserted into the DNS cache tables. It would then be possible that legitimate DNS requests would return incorrect responses.

Affected Components
Symantec Gateway Security 5400 Series, v2.0
Symantec Gateway Security 5300 Series, v1.0
Symantec Enterprise Firewall, v7.0.x (Windows and Solaris)
Symantec Enterprise Firewall v8.0 (Windows and Solaris)
Symantec VelociRaptor, Model 1100/1200/1300
Symantec VelociRaptor, Model 500/700/1000

Symantec Security Gateway products include a DNS proxy, DNSd, which can be configured to function as a DNS server. Under specific conditions, DNSd may be susceptible to DNS cache poisoning. DNS cache poisoning occurs when incorrect or false DNS records are inserted into a DNS server's cache tables. The results of inadvertent or intentional DNS cache poisoning can be unintentional loss of service or potentially malicious activity.

Symantec Response
Symantec released a hotfix to address this issue that provides additional authentication and validation checks for each response directed to DNSd.

Symantec recommends customers apply the appropriate hotfix for their affected product versions immediately to protect against this type of threat. Product specific hotfixes are available via the Symantec Enterprise Support site http://www.symantec.com/techsupp.

Symantec is not aware of any active attempts against or customer impact from this issue.

A CVE Candidate name has been requested from the Common Vulnerabilities and Exposures (CVE) initiative for this issue. This advisory will be revised accordingly upon receipt of the CVE Candidate name.

This is a candidate for inclusion in the CVE list (http://cve.mitre.org), which standardizes names for security problems.

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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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.

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-2004 15:30:02 PDT