[USN-5013-1] systemd vulnerabilities

========================================================================== Ubuntu Security Notice USN-5013-1 July 20, 2021
systemd vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 21.04 – Ubuntu 20.10 – Ubuntu 20.04 LTS – Ubuntu 18.04 LTS
Several security issues were fixed in systemd.
Software Description: – systemd: system and service manager
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 LTS: systemd 245.4-4ubuntu3.10
Ubuntu 18.04 LTS: systemd 237-3ubuntu10.49
After a standard system update you need to reboot your computer to make all the necessary changes.
References: ubuntu.com/security/notices/USN-5013-1 CVE-2020-13529, CVE-2021-33910
Package Information: launchpad.net/ubuntu/+source/systemd/247.3-3ubuntu3.4 launchpad.net/ubuntu/+source/systemd/246.6-1ubuntu1.7 launchpad.net/ubuntu/+source/systemd/245.4-4ubuntu3.10 launchpad.net/ubuntu/+source/systemd/237-3ubuntu10.49