Synopsis:    Moderate: dhcp security update
Issue Date:  2011-12-14
CVE Numbers: CVE-2011-4539


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.

SL6:
  i386
     dhclient-4.1.1-25.P1.el6_2.1.i686.rpm
     dhcp-4.1.1-25.P1.el6_2.1.i686.rpm
     dhcp-common-4.1.1-25.P1.el6_2.1.i686.rpm
     dhcp-debuginfo-4.1.1-25.P1.el6_2.1.i686.rpm
     dhcp-devel-4.1.1-25.P1.el6_2.1.i686.rpm
  x86_64
     dhclient-4.1.1-25.P1.el6_2.1.x86_64.rpm
     dhcp-4.1.1-25.P1.el6_2.1.x86_64.rpm
     dhcp-common-4.1.1-25.P1.el6_2.1.x86_64.rpm
     dhcp-debuginfo-4.1.1-25.P1.el6_2.1.i686.rpm
     dhcp-debuginfo-4.1.1-25.P1.el6_2.1.x86_64.rpm
     dhcp-devel-4.1.1-25.P1.el6_2.1.i686.rpm
     dhcp-devel-4.1.1-25.P1.el6_2.1.x86_64.rpm

- Scientific Linux Development Team