Cisco Integrated Management Controller Denial of Service Vulnerability

Cisco Unified Computing System (UCS) C-Series Rack Server version 1.4 contains a vulnerability that could allow an unauthenticated, remote attacker to cause the Cisco Integrated Management Controller (CIMC), which is used for management/monitoring of the Cisco UCS Rack Server, to stop responding or a reboot of the CIMC.

The vulnerability is due to a failure to limit incoming connections to certain ports. An attacker could exploit this vulnerability by running nmap against the affected device. An exploit could allow the attacker to cause the CIMC to stop responding or a reboot of the CIMC.

Cisco has confirmed this vulnerability in a security notice and software updates are available.

To exploit the vulnerability the attacker may need access to trusted internal networks to run nmap against the targeted system. This access requirement may limit 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.