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CentOS 7 : dhcp (CESA-2018:0483)

high Nessus Plugin ID 108338

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Synopsis

The remote CentOS host is missing one or more security updates.

Description

An update for dhcp is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows individual devices on an IP network to get their own network configuration information, including an IP address, a subnet mask, and a broadcast address. The dhcp packages provide a relay agent and ISC DHCP service required to enable and administer DHCP on a network.

Security Fix(es) :

* dhcp: Buffer overflow in dhclient possibly allowing code execution triggered by malicious server (CVE-2018-5732)

* dhcp: Reference count overflow in dhcpd allows denial of service (CVE-2018-5733)

For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

Red Hat would like to thank ISC for reporting these issues. Upstream acknowledges Felix Wilhelm (Google) as the original reporter of these issues.

Solution

Update the affected dhcp packages.

See Also

http://www.nessus.org/u?040d753b

Plugin Details

Severity: High

ID: 108338

File Name: centos_RHSA-2018-0483.nasl

Version: 1.7

Type: local

Agent: unix

Published: 3/15/2018

Updated: 7/10/2020

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

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

CVSS Score Source: CVE-2018-5732

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:centos:centos:dhclient, cpe:/o:centos:centos:7, p-cpe:/a:centos:centos:dhcp-devel, p-cpe:/a:centos:centos:dhcp-common, p-cpe:/a:centos:centos:dhcp-libs, p-cpe:/a:centos:centos:dhcp

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

Patch Publication Date: 3/14/2018

Vulnerability Publication Date: 1/16/2019

Reference Information

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

IAVB: 2018-B-0034-S

RHSA: 2018:0483