A vulnerability in a DHCP function that assigns IP addresses to AAA clients on Cisco IOS XE Software could allow an authenticated, remote attacker to cause a reload of the affected device. The vulnerability is due to improper processing of AAA packets that require IP address assignment from a DHCP pool. An attacker could exploit this vulnerability by sending AAA packets to a device configured to authenticate and assign an address from a DHCP pool. An exploit could allow the attacker to cause a reload of the affected device. Cisco has confirmed the vulnerability in a security notice and released software updates. To exploit this vulnerability, an attacker would need to authenticate to the targeted device. This access requirement decreases 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.
The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
| Version | Description | Section | Status | Date |
| 1.0 | Initial Release | NA | Final | 2013-Nov-21 |
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