RHEL 6 : dhcp (RHSA-2011:0256)

High Nessus Plugin ID 51993


The remote Red Hat host is missing one or more security updates.


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. DHCPv6 is the DHCP protocol version for IPv6 networks.

A flaw was found in the way the dhcpd daemon processed certain DHCPv6 messages for addresses that had previously been declined and marked as abandoned internally. If a remote attacker sent such messages to dhcpd, it could cause dhcpd to crash due to an assertion failure if it was running as a DHCPv6 server. (CVE-2011-0413)

Red Hat would like to thank Internet Systems Consortium for reporting this issue.

Users running dhcpd as a DHCPv6 server 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.


Update the affected packages.

See Also




Plugin Details

Severity: High

ID: 51993

File Name: redhat-RHSA-2011-0256.nasl

Version: $Revision: 1.11 $

Type: local

Agent: unix

Published: 2011/02/16

Modified: 2017/01/04

Dependencies: 12634

Risk Information

Risk Factor: High


Base Score: 7.8

Temporal Score: 6.8

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

Temporal Vector: CVSS2#E:ND/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:dhclient, p-cpe:/a:redhat:enterprise_linux:dhcp, p-cpe:/a:redhat:enterprise_linux:dhcp-debuginfo, p-cpe:/a:redhat:enterprise_linux:dhcp-devel, cpe:/o:redhat:enterprise_linux:6, cpe:/o:redhat:enterprise_linux:6.0

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2011/02/15

Reference Information

CVE: CVE-2011-0413

BID: 46035

RHSA: 2011:0256