USN-5013-1: systemd vulnerabilities

Releases

• Ubuntu 21.04
• Ubuntu 20.10
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM

Packages

• systemd - system and service manager

Details

It was discovered that systemd incorrectly handled certain mount paths. A
local attacker could possibly use this issue to cause systemd to crash,
resulting in a denial of service. (CVE-2021-33910)

Mitchell Frank discovered that systemd incorrectly handled DHCP FORCERENEW
packets. A remote attacker could possibly use this issue to reconfigure
servers. (CVE-2020-13529)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 21.04

• systemd - 247.3-3ubuntu3.4

Ubuntu 20.10

• systemd - 246.6-1ubuntu1.7

Ubuntu 20.04

• systemd - 245.4-4ubuntu3.10

Ubuntu 18.04

• systemd - 237-3ubuntu10.49

After a standard system update you need to reboot your computer to make all
the necessary changes.

References

• CVE-2020-13529
• CVE-2021-33910

Related notices

• USN-5013-2: libnss-myhostname, systemd, libudev1-udeb, systemd-journal-remote, udev, systemd-sysv, libsystemd0, libsystemd-dev, libudev1, libudev-dev, libpam-systemd, systemd-container, systemd-coredump, libnss-mymachines, libnss-resolve, udev-udeb