USN-3855-1: systemd vulnerabilities

11 January 2019

Several security issues were fixed in systemd.

Releases

Packages

  • systemd - system and service manager

Details

It was discovered that systemd-journald allocated variable-length buffers
for certain message fields on the stack. A local attacker could
potentially exploit this to cause a denial of service, or execute
arbitrary code. (CVE-2018-16864)

It was discovered that systemd-journald allocated variable-length arrays
of objects representing message fields on the stack. A local attacker
could potentially exploit this to cause a denial of service, or execute
arbitrary code. (CVE-2018-16865)

An out-of-bounds read was discovered in systemd-journald. A local
attacker could potentially exploit this to obtain sensitive information
and bypass ASLR protections. (CVE-2018-16866)

Update instructions

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

Ubuntu 18.10
Ubuntu 18.04
Ubuntu 16.04

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