Moderate CentOS dhcp Update


dhclient-3.0.5-31.el5_8.1.i386.rpm, dhclient-3.0.5-31.el5_8.1.x86_64.rpm, dhcp-3.0.5-31.el5_8.1.i386.rpm, dhcp-3.0.5-31.el5_8.1.src.rpm, dhcp-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
2017-07-27 19:03
CVE-2012-3571 isc-dhcp
2017-04-01 19:06
2017-01-05 20:10


Updated dhcp packages that fix one security issue are now available for
Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having moderate
security impact. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available from the CVE link in
the References section.

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.
Please see

Am I vulnerable?

The constraints below list the versions that this vulnerability is patched in, and versions that are unaffected. If a patch is ready but unrealeased, then it is pending.

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Affected package information

Release Package Patched in
5 dhclient dhclient-3.0.5-31.el5_8.1.i386.rpm
dhclient dhclient-3.0.5-31.el5_8.1.x86_64.rpm
dhcp dhcp-3.0.5-31.el5_8.1.i386.rpm
dhcp dhcp-3.0.5-31.el5_8.1.src.rpm
dhcp dhcp-3.0.5-31.el5_8.1.x86_64.rpm
dhcp-devel dhcp-devel-3.0.5-31.el5_8.1.i386.rpm
dhcp-devel dhcp-devel-3.0.5-31.el5_8.1.x86_64.rpm
libdhcp4client libdhcp4client-3.0.5-31.el5_8.1.i386.rpm
libdhcp4client libdhcp4client-3.0.5-31.el5_8.1.x86_64.rpm
libdhcp4client-devel libdhcp4client-devel-3.0.5-31.el5_8.1.i386.rpm
libdhcp4client-devel libdhcp4client-devel-3.0.5-31.el5_8.1.x86_64.rpm