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.
bugzilla.redhat.com/show_bug.cgi?id=1939368
lists.fedoraproject.org/archives/list/[email protected]/message/CVTJUOFFFHINLKWAOC2ZSC5MOPD4SJ24/
lists.fedoraproject.org/archives/list/[email protected]/message/FHG7GWSQWKF7JXIMLOGJBKZWBB4VIAJ7/
lists.fedoraproject.org/archives/list/[email protected]/message/GHURNEHHUBSW45KMIZ4FNBCSUPWPGV5V/
security.gentoo.org/glsa/202105-20
www.oracle.com/security-alerts/cpujan2022.html