Amazon Linux 2 : systemd (ALAS-2019-1160)

critical Nessus Plugin ID 122161
New! Plugin Severity Now Using CVSS v3

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Synopsis

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

Description

An allocation of memory without limits, that could result in the stack clashing with another memory region, was discovered in systemd-journald when a program with long command line arguments calls syslog. A local attacker may use this flaw to crash systemd-journald or escalate privileges.(CVE-2018-16864)

It was discovered that systemd-network does not correctly keep track of a buffer size when constructing DHCPv6 packets. This flaw may lead to an integer underflow that can be used to produce an heap-based buffer overflow. A malicious host on the same network segment as the victim's one may advertise itself as a DHCPv6 server and exploit this flaw to cause a Denial of Service or potentially gain code execution on the victim's machine.(CVE-2018-15688)

An allocation of memory without limits, that could result in the stack clashing with another memory region, was discovered in systemd-journald when many entries are sent to the journal socket. A local attacker, or a remote one if systemd-journal-remote is used, may use this flaw to crash systemd-journald or execute code with journald privileges.(CVE-2018-16865)

Solution

Run 'yum update systemd' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2019-1160.html

Plugin Details

Severity: Critical

ID: 122161

File Name: al2_ALAS-2019-1160.nasl

Version: 1.2

Type: local

Agent: unix

Published: 2/14/2019

Updated: 5/17/2019

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

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

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

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/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: 2/14/2019

Vulnerability Publication Date: 10/26/2018

Reference Information

CVE: CVE-2018-15688, CVE-2018-16864, CVE-2018-16865

ALAS: 2019-1160