Amazon Linux 2 : dhcp (ALAS-2018-963)

high Nessus Plugin ID 109131
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Synopsis

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

Description

Omapi code doesn't free socket descriptors when empty message is received allowing denial-of-service

It was found that the DHCP daemon did not properly clean up closed OMAPI connections in certain cases. A remote attacker able to connect to the OMAPI port could use this flaw to exhaust file descriptors in the DHCP daemon, leading to a denial of service in the OMAPI functionality.(CVE-2017-3144)

Solution

Run 'yum update dhcp' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2018-963.html

Plugin Details

Severity: High

ID: 109131

File Name: al2_ALAS-2018-963.nasl

Version: 1.2

Type: local

Agent: unix

Published: 4/18/2018

Updated: 2/8/2019

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

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

CVSS v3

Risk Factor: High

Base Score: 7.5

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:dhclient, p-cpe:/a:amazon:linux:dhcp, p-cpe:/a:amazon:linux:dhcp-common, p-cpe:/a:amazon:linux:dhcp-debuginfo, p-cpe:/a:amazon:linux:dhcp-devel, p-cpe:/a:amazon:linux:dhcp-libs, cpe:/o:amazon:linux:2

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

Patch Publication Date: 2/21/2018

Vulnerability Publication Date: 1/16/2019

Reference Information

CVE: CVE-2017-3144

ALAS: 2018-963