Amazon Linux 2 : dhcp (ALAS-2018-984)

Medium Nessus Plugin ID 109137

Synopsis

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

Description

Buffer overflow in dhclient possibly allowing code execution triggered by malicious server

An out-of-bound memory access flaw was found in the way dhclient processed a DHCP response packet. A malicious DHCP server could potentially use this flaw to crash dhclient processes running on DHCP client machines via a crafted DHCP response packet. (CVE-2018-5732)

Reference count overflow in dhcpd allows denial of service

A denial of service flaw was found in the way dhcpd handled reference counting when processing client requests. A malicious DHCP client could use this flaw to trigger a reference count overflow on the server side, potentially causing dhcpd to crash, by sending large amounts of traffic. (CVE-2018-5733)

Solution

Run 'yum update dhcp' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2018-984.html

Plugin Details

Severity: Medium

ID: 109137

File Name: al2_ALAS-2018-984.nasl

Version: 1.3

Type: local

Agent: unix

Published: 2018/04/18

Updated: 2019/02/08

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS v3.0

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: 2018/04/05

Vulnerability Publication Date: 2019/01/16

Reference Information

CVE: CVE-2018-5732, CVE-2018-5733

ALAS: 2018-984

IAVB: 2018-B-0034