dhcp is vulnerable to denial of service (DoS). The vulnerability exists as flaws were found in the way the dhcpd daemon handled certain incomplete request packets. A remote attacker could use these flaws to crash dhcpd via a specially-crafted request.
kb.juniper.net/InfoCenter/index?page=content&id=JSA10761
lists.fedoraproject.org/pipermail/package-announce/2011-September/065176.html
lists.opensuse.org/opensuse-updates/2011-09/msg00014.html
secunia.com/advisories/45582
secunia.com/advisories/45595
secunia.com/advisories/45629
secunia.com/advisories/45639
secunia.com/advisories/45817
secunia.com/advisories/45918
secunia.com/advisories/46780
security.gentoo.org/glsa/glsa-201301-06.xml
securitytracker.com/id?1025918
www.debian.org/security/2011/dsa-2292
www.isc.org/files/release-notes/DHCP%203.1-ESV-R3_0.html
www.isc.org/files/release-notes/DHCP%204.1-ESV-R3.html
www.isc.org/files/release-notes/DHCP%204.2.2_0.html
www.isc.org/software/dhcp/advisories/cve-2011-2748
www.mandriva.com/security/advisories?name=MDVSA-2011:128
www.redhat.com/support/errata/RHSA-2011-1160.html
www.securityfocus.com/bid/49120
www.ubuntu.com/usn/USN-1190-1
access.redhat.com/errata/RHSA-2011:1160
access.redhat.com/security/updates/classification/#moderate
bugzilla.redhat.com/attachment.cgi?id=517665&action=diff
bugzilla.redhat.com/show_bug.cgi?id=729382
hermes.opensuse.org/messages/11695711