Synopsis:    Moderate: dhcp security update
Issue Date:  2012-08-03
CVE Numbers: CVE-2012-3571


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
zero-length client identifiers. A remote attacker could use this flaw to
send a specially-crafted request to dhcpd, possibly causing it to enter an
infinite loop and consume an excessive amount of CPU time. (CVE-2012-3571)

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.

SL5:
  i386
     dhclient-3.0.5-31.el5_8.1.i386.rpm
     dhcp-3.0.5-31.el5_8.1.i386.rpm
     dhcp-debuginfo-3.0.5-31.el5_8.1.i386.rpm
     dhcp-devel-3.0.5-31.el5_8.1.i386.rpm
     libdhcp4client-3.0.5-31.el5_8.1.i386.rpm
     libdhcp4client-devel-3.0.5-31.el5_8.1.i386.rpm
  x86_64
     dhclient-3.0.5-31.el5_8.1.x86_64.rpm
     dhcp-3.0.5-31.el5_8.1.x86_64.rpm
     dhcp-debuginfo-3.0.5-31.el5_8.1.i386.rpm
     dhcp-debuginfo-3.0.5-31.el5_8.1.x86_64.rpm
     dhcp-devel-3.0.5-31.el5_8.1.i386.rpm
     dhcp-devel-3.0.5-31.el5_8.1.x86_64.rpm
     libdhcp4client-3.0.5-31.el5_8.1.i386.rpm
     libdhcp4client-3.0.5-31.el5_8.1.x86_64.rpm
     libdhcp4client-devel-3.0.5-31.el5_8.1.i386.rpm
     libdhcp4client-devel-3.0.5-31.el5_8.1.x86_64.rpm

- Scientific Linux Development Team