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CentOS 6 : dhcp (CESA-2011:1819)

medium Nessus Plugin ID 57380

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Synopsis

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

Description

Updated dhcp packages that fix one security issue are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link 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.

A denial of service flaw was found in the way the dhcpd daemon handled DHCP request packets when regular expression matching was used in '/etc/dhcp/dhcpd.conf'. A remote attacker could use this flaw to crash dhcpd. (CVE-2011-4539)

Users of DHCP should upgrade to these updated packages, which contain a backported patch to correct this issue. After installing this update, all DHCP servers will be restarted automatically.

Solution

Update the affected dhcp packages.

See Also

http://www.nessus.org/u?48c2183d

Plugin Details

Severity: Medium

ID: 57380

File Name: centos_RHSA-2011-1819.nasl

Version: 1.12

Type: local

Agent: unix

Published: 12/23/2011

Updated: 1/4/2021

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

Vulnerability Information

CPE: p-cpe:/a:centos:centos:dhclient, p-cpe:/a:centos:centos:dhcp-devel, cpe:/o:centos:centos:6, p-cpe:/a:centos:centos:dhcp-common, p-cpe:/a:centos:centos:dhcp

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

Exploit Ease: No known exploits are available

Patch Publication Date: 12/22/2011

Vulnerability Publication Date: 12/8/2011

Reference Information

CVE: CVE-2011-4539

BID: 50971

RHSA: 2011:1819