A flaw was found in dnsmasq in versions before 2.85. When configured to
use a specific server for a given network interface, dnsmasq uses a
fixed port while forwarding queries. An attacker on the network, able to
find the outgoing port used by dnsmasq, only needs to guess the random
transmission ID to forge a reply and get it accepted by dnsmasq. This
flaw makes a DNS Cache Poisoning attack much easier. The highest threat
from this vulnerability is to data integrity.
guix ships dnsmasq@2.84. guix refresh shows version 2.85 is available,
and there are 43 dependent packages so this can go directly to master.
All dependent packages (refresh -l) build fine except for
python2-libvirt@7.2.0, which is failing also on master
(libvirt-python requires Python >= 3.5 to build). Since it's a python2
package and no other packages depends on it, can we just drop it?