Debian DSA-1623-1 : dnsmasq - DNS cache poisoning
Medium Nessus Plugin ID 33772
SynopsisThe remote Debian host is missing a security-related update.
DescriptionDan Kaminsky discovered that properties inherent to the DNS protocol lead to practical DNS cache poisoning attacks. Among other things, successful attacks can lead to misdirected web traffic and email rerouting.
This update changes Debian's dnsmasq packages to implement the recommended countermeasure: UDP query source port randomization. This change increases the size of the space from which an attacker has to guess values in a backwards-compatible fashion and makes successful attacks significantly more difficult.
This update also switches the random number generator to Dan Bernstein's SURF.
SolutionUpgrade the dnsmasq package.
For the stable distribution (etch), this problem has been fixed in version 2.35-1+etch4. Packages for alpha will be provided later.