Please Install the Updated Packages.

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) Upstream acknowledges Markus Hietava of the Codenomicon CROSS project as the original reporter of this issue. 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.

dhclient on CentOS 5

• http://lists.centos.org/pipermail/centos-announce/2012-August/018783.html

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Updated on 2015-03-25