CVE-2020-13529

Name	CVE-2020-13529
Description	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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
systemd (PTS)	buster, buster (security)	241-7~deb10u8	vulnerable
	bullseye	247.3-7+deb11u1	vulnerable
	bookworm, sid	252.6-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
systemd	source	(unstable)	249.4-2	unimportant

Notes

https://talosintelligence.com/vulnerability_reports/TALOS-2020-1142
https://github.com/systemd/systemd/issues/16774
https://bugzilla.redhat.com/show_bug.cgi?id=1959397
Fixed by: https://github.com/systemd/systemd/commit/38e980a6a5a3442c2f48b1f827284388096d8ca5 (v249-rc2)
Generic DHCP protocol issue, negligible security impact