CVE-2005-0817: Unknown vulnerability in the DNSd proxy, as used in Symantec Gateway Security 5400 2.x and 5300 1.x, Enterp...

Security readout for executives and security teams

This flaw affects DNS proxy handling in older Symantec gateway and firewall products. A remote attacker could poison the device’s DNS cache, causing users behind it to be sent to malicious sites instead of legitimate destinations. The source bundle does not provide a CVSS score or confirmed active exploitation. Exposure is likely limited to organizations still running the named legacy Symantec gateway, firewall, or VelociRaptor products with DNS proxy or caching functionality in use. Modern environments without these products are not indicated as affected by the provided sources. Treat as a legacy exposure review item. It is urgent only if named Symantec devices still process DNS for users, because successful poisoning could redirect browsing and authentication flows to malicious destinations. Mitigation focus: Identify and remove or isolate affected Symantec DNS proxy deployments.; Check Symantec’s original advisory or support records for vendor-specific fixes.; Disable DNS proxy or caching features if vendor guidance recommends it..

Prepared

Jun 29, 2026, 23:27 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.