Mandriva Linux Security Advisory 2011-182 - dhcpd in ISC DHCP 4.x before 4.2.3-P1 and 4.1-ESV before 4.1-ESV-R4 does not properly handle regular expressions in dhcpd.conf, which allows remote attackers to cause a denial of service via a crafted request packet. The updated packages have been patched to correct this issue.
51d4bd08b8453697bf7e58b071c313b90596cecaa635d600e40527886bc8cdf9