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Bug#1000159: dnsproxy listen unnecessary UDP port



Package: dnsproxy
Version: 1.16-0.1
Severity: important
X-Debbugs-Cc: marcos@talau.info
Control: forwarded -1 https://github.com/awaw/dnsproxy/issues/1

Hi there,

When dnsproxy starts it unnecessary listens to a random UDP port on all
interfaces. This opened port is not required to dnsproxy do their job.
If someone connects on that port it's possible to send unwanted DNS
answers to dnsproxy, these answers can be forwarded to the client, but
an attacker needs to know the DNS ID used by the client and the DNS ID
used by dnsproxy.


Regards,
mt

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