RHEL 6 : dhcp (RHSA-2011:1819)

This script is Copyright (C) 2011-2014 Tenable Network Security, Inc.


Synopsis :

The remote Red Hat 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.

See also :

https://www.redhat.com/security/data/cve/CVE-2011-4539.html
http://www.isc.org/software/dhcp/advisories/cve-2011-4539
http://rhn.redhat.com/errata/RHSA-2011-1819.html

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 5.0
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P)
CVSS Temporal Score : 3.7
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Red Hat Local Security Checks

Nessus Plugin ID: 57310 ()

Bugtraq ID: 50971

CVE ID: CVE-2011-4539