A vulnerability in the DHCP Relay feature of Cisco ASA Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition by causing an interface wedge. The vulnerability is due to improper handling of resources linked with the DHCP Relay feature. An attacker could exploit this vulnerability by sending DHCP packets at specific rates. An exploit could allow an attacker to cause an interface to become wedged, and stop processing incoming traffic. Once this state is reached, restoration of service can only be achieved by reloading the device. Cisco has released software updates that address this vulnerability. Workarounds that mitigate this vulnerability are not available. This advisory is available at the following link: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161005-asa-dhcp
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 public release | - | Final | 2016-October-05 |
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