USN-5013-2: systemd vulnerabilities

Releases

• Ubuntu 16.04 ESM

Packages

• systemd - system and service manager

Details

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

• systemd - 229-4ubuntu21.31+esm1
  Available with Ubuntu Pro

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