Memory leak in systemd - CVE-2019-20386

Vulnerability identifier: #VU24716

CSH Severity: Low

CVSS v4: 8.2 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H]

CVE-ID: CVE-2019-20386

CWE-ID: CWE-401

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to perform DoS attack on the target system.

The vulnerability exists due memory leak in button_open() function in login/logind-button.c in systemd. A remote attacker can execute the udevadm trigger command and perform denial of service attack.

systemd
systemd (Red Hat package)
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for x86_64
Opensuse
Fedora
Ansible Automation Platform
Red Hat OpenShift Container Platform

Install updates from vendor's website.

systemd - update to 243
systemd (Red Hat package) - addressed in versions 219-78.el7, 239-40.el8
Ansible Automation Platform - addressed in versions 1.0, 1.1
Red Hat OpenShift Container Platform - update to 4.3.40
systemd - update to 241-14.git18dd3fb.fc30

• https://github.com/systemd/systemd/commit/b2774a3ae692113e1f47a336a6c09bac9cfb49ad

• Multiple vulnerabilities in systemd
• OpenSUSE Linux update for systemd
• Red Hat Enterprise Linux 7 update for systemd
• Red Hat Enterprise Linux 8 update for systemd
• Multiple vulnerabilities in Ansible Automation Platform 1.0 packages
• Multiple vulnerabilities in Ansible Automation Platform 1.1 packages
• Multiple vulnerabilities in Red Hat OpenShift Container Platform 4.3
• Fedora 30 update for systemd