10/24/2005

Most DNS servers ‘wide open’ to attack

Filed under: — By Aviran Mordo @ 1:50 pm

Four in five authoritative domain name system (DNS) servers across the world are vulnerable to types of hacking attacks that might be used by hackers to misdirect surfers to potentially fraudulent domains. A survey by net performance firm the Measurement Factory commissioned by net infrastructure outfit Infoblox of 1.3m internet name servers found that 84 per cent might be vulnerable to pharming attacks. Others exhibit separate security and deployment-related vulnerabilities.

Pharming attacks use DNS poisoning or domain hijacks to redirect users to dodgy urls. For example widespread attacks launched in April attempt to fool consumers into visiting potentially malicious web sites by changing the records used to convert domain names to IP addresses. These particular pharming attacks exploited name servers that allow recursive queries from any IP address. Recurssive queries are a form of name resolution that may require a name server to relay requests to other name servers.

Source: The Register

 

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