Amazon Linux 2 : systemd (ALAS-2019-1141)

high Nessus Plugin ID 121050
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


The remote Amazon Linux 2 host is missing a security update.


Large syslogd messages sent to journald can cause stack corruption, causing journald to crash. The version of systemd on Amazon Linux 2 is not vulnerable to privilege escalation in this case. (CVE-2018-16864)

Large native messages to journald can cause stack corruption, leading to possible local privilege escalation.(CVE-2018-16865)

Please note, if you have systemd-journald-remote configured over http, then you could be open to remote escalation on previous versions of the systemd package. The systemd-journald-remote service is not installed by default on Amazon Linux 2, and when installed and enabled, the default configuration is to use https. (CVE-2018-16865)

An out-of-bounds read in journald, triggered by a specially crafted message, can be used to leak information through the journal file (CVE-2018-16866)


Run 'yum update systemd' then reboot your instance, to update your system.

See Also

Plugin Details

Severity: High

ID: 121050

File Name: al2_ALAS-2019-1141.nasl

Version: 1.4

Type: local

Agent: unix

Published: 1/10/2019

Updated: 5/17/2019

Dependencies: ssh_get_info.nasl

Risk Information


Risk Factor: Medium

Score: 6.7


Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.6

Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: E:POC/RL:OF/RC:C


Risk Factor: High

Base Score: 7.8

Temporal Score: 7

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:libgudev1, p-cpe:/a:amazon:linux:libgudev1-devel, p-cpe:/a:amazon:linux:systemd, p-cpe:/a:amazon:linux:systemd-debuginfo, p-cpe:/a:amazon:linux:systemd-devel, p-cpe:/a:amazon:linux:systemd-journal-gateway, p-cpe:/a:amazon:linux:systemd-libs, p-cpe:/a:amazon:linux:systemd-networkd, p-cpe:/a:amazon:linux:systemd-python, p-cpe:/a:amazon:linux:systemd-resolved, p-cpe:/a:amazon:linux:systemd-sysv, cpe:/o:amazon:linux:2

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/9/2019

Vulnerability Publication Date: 1/11/2019

Reference Information

CVE: CVE-2018-16864, CVE-2018-16865, CVE-2018-16866

ALAS: 2019-1141