(RHSA-2011:1819) Moderate: dhcp security update

2011-12-1400:00:00

access.redhat.com

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

0.02 Low

EPSS

Percentile

87.6%

JSON

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.

OSVersionArchitecturePackageVersionFilename
RedHat6ppc64dhcp< 4.1.1-25.P1.el6_2.1dhcp-4.1.1-25.P1.el6_2.1.ppc64.rpm
RedHat6i686dhclient< 4.1.1-25.P1.el6_2.1dhclient-4.1.1-25.P1.el6_2.1.i686.rpm
RedHat6ppcdhcp-devel< 4.1.1-25.P1.el6_2.1dhcp-devel-4.1.1-25.P1.el6_2.1.ppc.rpm
RedHat6i686dhcp-common< 4.1.1-25.P1.el6_2.1dhcp-common-4.1.1-25.P1.el6_2.1.i686.rpm
RedHat6ppc64dhclient< 4.1.1-25.P1.el6_2.1dhclient-4.1.1-25.P1.el6_2.1.ppc64.rpm
RedHat6i686dhcp< 4.1.1-25.P1.el6_2.1dhcp-4.1.1-25.P1.el6_2.1.i686.rpm
RedHat6s390xdhclient< 4.1.1-25.P1.el6_2.1dhclient-4.1.1-25.P1.el6_2.1.s390x.rpm
RedHat6x86_64dhcp-debuginfo< 4.1.1-25.P1.el6_2.1dhcp-debuginfo-4.1.1-25.P1.el6_2.1.x86_64.rpm
RedHat6s390xdhcp-common< 4.1.1-25.P1.el6_2.1dhcp-common-4.1.1-25.P1.el6_2.1.s390x.rpm
RedHat6ppcdhcp-debuginfo< 4.1.1-25.P1.el6_2.1dhcp-debuginfo-4.1.1-25.P1.el6_2.1.ppc.rpm

OS	Version	Architecture	Package	Version	Filename
RedHat	6	ppc64	dhcp	< 4.1.1-25.P1.el6_2.1	dhcp-4.1.1-25.P1.el6_2.1.ppc64.rpm
RedHat	6	i686	dhclient	< 4.1.1-25.P1.el6_2.1	dhclient-4.1.1-25.P1.el6_2.1.i686.rpm
RedHat	6	ppc	dhcp-devel	< 4.1.1-25.P1.el6_2.1	dhcp-devel-4.1.1-25.P1.el6_2.1.ppc.rpm
RedHat	6	i686	dhcp-common	< 4.1.1-25.P1.el6_2.1	dhcp-common-4.1.1-25.P1.el6_2.1.i686.rpm
RedHat	6	ppc64	dhclient	< 4.1.1-25.P1.el6_2.1	dhclient-4.1.1-25.P1.el6_2.1.ppc64.rpm
RedHat	6	i686	dhcp	< 4.1.1-25.P1.el6_2.1	dhcp-4.1.1-25.P1.el6_2.1.i686.rpm
RedHat	6	s390x	dhclient	< 4.1.1-25.P1.el6_2.1	dhclient-4.1.1-25.P1.el6_2.1.s390x.rpm
RedHat	6	x86_64	dhcp-debuginfo	< 4.1.1-25.P1.el6_2.1	dhcp-debuginfo-4.1.1-25.P1.el6_2.1.x86_64.rpm
RedHat	6	s390x	dhcp-common	< 4.1.1-25.P1.el6_2.1	dhcp-common-4.1.1-25.P1.el6_2.1.s390x.rpm
RedHat	6	ppc	dhcp-debuginfo	< 4.1.1-25.P1.el6_2.1	dhcp-debuginfo-4.1.1-25.P1.el6_2.1.ppc.rpm