USN-5013-1: systemd vulnerabilities

20 July 2021

Several security issues were fixed in systemd.

Releases

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
Ubuntu 20.10
Ubuntu 20.04
Ubuntu 18.04

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

Related notices

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