var-200210-0165
Vulnerability from variot

The web proxy component in Symantec Enterprise Firewall (SEF) 6.5.2 through 7.0, Raptor Firewall 6.5 and 6.5.3, VelociRaptor, and Symantec Gateway Security allow remote attackers to cause a denial of service (connection resource exhaustion) via multiple connection requests to domains whose DNS server is unresponsive or does not exist, which generates a long timeout. A denial of service vulnerability has been reported in this component. According to the report, the proxy blocks while attempting to resolve hostnames specified in CONNECT requests. While this is occuring, requests from other clients are not handled. This behaviour can be exploited to cause a denial of service condition. There is a problem when the WEB proxy service program of the firewall handles non-existing internal URLs. By submitting non-existent or wrong internal URL requests multiple times, the proxy service program may time out for a period of time without responding to subsequent proxy request connections, resulting in Denial of service attack

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