CVE-2018-16888
Published: 14 January 2019
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.
Priority
Status
Package | Release | Status |
---|---|---|
systemd Launchpad, Ubuntu, Debian |
upstream |
Released
(237-1)
|
trusty |
Not vulnerable
(code not built)
|
|
xenial |
Released
(229-4ubuntu21.27)
|
|
bionic |
Not vulnerable
(237-3ubuntu10.9)
|
|
cosmic |
Not vulnerable
|
|
disco |
Not vulnerable
|
|
eoan |
Not vulnerable
|
|
Patches: upstream: https://github.com/systemd/systemd/commit/db256aab13d8a89d583ecd2bacf0aca87c66effc upstream: https://github.com/systemd/systemd/commit/73969ab61c39357e6892747e43307fbf07cafbed |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 4.7 |
Attack vector | Local |
Attack complexity | High |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |