#VU25332 Use-after-free in systemd - CVE-2020-1712
Published: February 13, 2020 / Updated: March 7, 2020
Vulnerability identifier: #VU25332
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Clear
CVE-ID: CVE-2020-1712
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
systemd
systemd
Software vendor:
Freedesktop.org
Freedesktop.org
Description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error when processing dbus messages during asynchronous Polkit queries in bus-polkit.c in systemd. A local unprivileged user can send a specially crafted dbus message, trigger a use-after-free error and crash services or execute arbitrary code on the system with elevated privileges.
Remediation
Install update from vendor's website.