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USN-5013-2: systemd vulnerabilities

20 July 2021

Several security issues were fixed in systemd.



  • systemd - system and service manager


USN-5013-1 fixed several vulnerabilities in systemd. This update provides
the corresponding update for Ubuntu 16.04 ESM.

Original advisory 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 16.04

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

Related notices

  • USN-5013-1: libnss-myhostname, udev, libsystemd0, systemd-journal-remote, libsystemd-dev, libnss-resolve, libudev1, libnss-systemd, systemd, libpam-systemd, systemd-sysv, libudev1-udeb, systemd-coredump, systemd-container, libnss-mymachines, systemd-tests, libudev-dev, systemd-timesyncd, udev-udeb