USN-3855-1: systemd vulnerabilities
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
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to reboot your computer to make
all the necessary changes.
References
Source: USN-3855-1: systemd vulnerabilities
