This indicates an attack attempt to exploit a Stack-Based Buffer Overflow Vulnerability in ISC DHCP dhclient.
The vulnerability is due to an error in the vulnerable application when handling a maliciously crafted request. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application, via a crafted request.
ISC DHCP dhclient 4.1 prior to 4.1-ESV-R15-P1
ISC DHCP dhclient 4.3 prior to 4.3.6-P1
ISC DHCP dhclient 4.4 prior to 4.4.1
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor: