CVE-2021-3448 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? Thanks, Nicolò