==========================================================================
Ubuntu Security Notice USN-3855-1
January 11, 2019
systemd vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 18.10
– Ubuntu 18.04 LTS
– Ubuntu 16.04 LTS
Summary:
Several security issues were fixed in systemd.
Software Description:
– 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:
systemd 239-7ubuntu10.6
Ubuntu 18.04 LTS:
systemd 237-3ubuntu10.11
Ubuntu 16.04 LTS:
systemd 229-4ubuntu21.15
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
https://usn.ubuntu.com/usn/usn-3855-1
CVE-2018-16864, CVE-2018-16865, CVE-2018-16866
Package Information:
https://launchpad.net/ubuntu/+source/systemd/239-7ubuntu10.6
https://launchpad.net/ubuntu/+source/systemd/237-3ubuntu10.11
https://launchpad.net/ubuntu/+source/systemd/229-4ubuntu21.15
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