| 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, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, 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) | jessie, jessie (lts) | 215-17+deb8u15 | vulnerable |
| stretch (security) | 232-25+deb9u14 | vulnerable |
| stretch (lts), stretch | 232-25+deb9u17 | vulnerable |
| buster, buster (lts) | 241-7~deb10u11 | vulnerable |
| buster (security) | 241-7~deb10u10 | vulnerable |
| bullseye | 247.3-7+deb11u5 | vulnerable |
| bullseye (security) | 247.3-7+deb11u6 | vulnerable |
| bookworm | 252.31-1~deb12u1 | fixed |
| sid, trixie | 257~rc2-3 | 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