An exploitable denial-of-service vulnerability exists in Systemd 245. A specially crafted DHCP FORCERENEW packet can cause a server running the DHCP client to be vulnerable to a DHCP ACK spoofing attack. An attacker can forge a pair of FORCERENEW and DCHP ACK packets to reconfigure the server.
www.openwall.com/lists/oss-security/2021/08/04/2
www.openwall.com/lists/oss-security/2021/08/17/3
www.openwall.com/lists/oss-security/2021/09/07/3
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/42TMJVNYRY65B4QCJICBYOEIVZV3KUYI/
security.gentoo.org/glsa/202107-48
security.netapp.com/advisory/ntap-20210625-0005/
talosintelligence.com/vulnerability_reports/TALOS-2020-1142