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Ubuntu Security Notice USN-3891-1
February 18, 2019

systemd vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

– Ubuntu 18.10
– Ubuntu 18.04 LTS
– Ubuntu 16.04 LTS

Summary:

systemd could be made to crash if it received specially a crafted
D-Bus message.

Software Description:
– systemd: system and service manager

Details:

It was discovered that systemd incorrectly handled certain D-Bus messages.
A local unprivileged attacker could exploit this in order to crash the
init process, resulting in a system denial-of-service (kernel panic).

Update instructions:

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

Ubuntu 18.10:
libsystemd0 239-7ubuntu10.8
systemd 239-7ubuntu10.8

Ubuntu 18.04 LTS:
libsystemd0 237-3ubuntu10.13
systemd 237-3ubuntu10.13

Ubuntu 16.04 LTS:
libsystemd0 229-4ubuntu21.16
systemd 229-4ubuntu21.16

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

References:
https://usn.ubuntu.com/usn/usn-3891-1
CVE-2019-6454

Package Information:
https://launchpad.net/ubuntu/+source/systemd/239-7ubuntu10.8
https://launchpad.net/ubuntu/+source/systemd/237-3ubuntu10.13
https://launchpad.net/ubuntu/+source/systemd/229-4ubuntu21.16

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