Cisco IOS Software DHCP Server remember Functionality Vulnerability

An issue in the DHCP server code of Cisco IOS Software could allow an unauthenticated, adjacent attacker to cause the device to reload.

The issue is due to the remember functionality of the DHCP server. An attacker could exploit this issue by obtaining a lease and then releasing it. An exploit could allow the attacker to cause the affected device to reload.

Cisco has confirmed the vulnerability in a security notice and released software updates.

To exploit this vulnerability, an attacker must be on the same broadcast or collision domain of a targeted device. This access requirement reduces the likelihood of a successful exploit.

Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.