CentOS 4 / 5 : dhcp (CESA-2011:0428)

high Nessus Plugin ID 53339

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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 4, 5, and 6.

The Red Hat Security Response Team has rated this update as having important 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.

It was discovered that the DHCP client daemon, dhclient, did not sufficiently sanitize certain options provided in DHCP server replies, such as the client hostname. A malicious DHCP server could send such an option with a specially crafted value to a DHCP client. If this option's value was saved on the client system, and then later insecurely evaluated by a process that assumes the option is trusted, it could lead to arbitrary code execution with the privileges of that process. (CVE-2011-0997)

Red Hat would like to thank Sebastian Krahmer of the SuSE Security Team for reporting this issue.

All dhclient users should upgrade to these updated packages, which contain a backported patch to correct this issue.

Solution

Update the affected dhcp packages.

Plugin Details

Severity: High

ID: 53339

File Name: centos_RHSA-2011-0428.nasl

Version: 1.15

Type: local

Agent: unix

Family: CentOS Local Security Checks

Published: 4/11/2011

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: Medium

Score: 5.1

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.2

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

Vulnerability Information

CPE: p-cpe:/a:centos:centos:dhclient, p-cpe:/a:centos:centos:libdhcp4client, p-cpe:/a:centos:centos:dhcp-devel, p-cpe:/a:centos:centos:libdhcp4client-devel, p-cpe:/a:centos:centos:dhcp, cpe:/o:centos:centos:4, cpe:/o:centos:centos:5

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/8/2011

Vulnerability Publication Date: 4/8/2011

Exploitable With

CANVAS (CANVAS)

Reference Information

CVE: CVE-2011-0997

BID: 47176

RHSA: 2011:0428

Detections

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