Synopsis: Moderate: dhcp security update
Issue Date: 2012-08-02
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
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.
– Scientific Linux Development Team