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CVE-2018-16888

Status Candidate

Overview

It was discovered systemd does not correctly check the content of PIDFile files before using it to kill processes. When a service is run from an unprivileged user (e.g. User field set in the service file), a local attacker who is able to write to the PIDFile of the mentioned service may use this flaw to trick systemd into killing other services and/or privileged processes. Versions before v237 are vulnerable.

Related Files

Ubuntu Security Notice USN-4269-1
Posted Feb 5, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4269-1 - It was discovered that systemd incorrectly handled certain PIDFile files. A local attacker could possibly use this issue to trick systemd into killing privileged processes. This issue only affected Ubuntu 16.04 LTS. It was discovered that systemd incorrectly handled certain udevadm trigger commands. A local attacker could possibly use this issue to cause systemd to consume resources, leading to a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, local
systems | linux, ubuntu
advisories | CVE-2018-16888, CVE-2019-20386, CVE-2020-1712
SHA-256 | 801a330186d2d0b57ba060621d63e9763e16344004da69650cf8fc1454009020
Red Hat Security Advisory 2019-2091-01
Posted Aug 6, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-2091-01 - The systemd packages contain systemd, a system and service manager for Linux, compatible with the SysV and LSB init scripts. It provides aggressive parallelism capabilities, uses socket and D-Bus activation for starting services, offers on-demand starting of daemons, and keeps track of processes using Linux cgroups. An out-of-bounds read alongside various other issues have been addressed.

tags | advisory
systems | linux, redhat
advisories | CVE-2018-15686, CVE-2018-16866, CVE-2018-16888
SHA-256 | cad79e179794f9db3938298ad892ddea455c7416f87b0c3de0c320e1d703beac
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