A vulnerability in the high availability service of Cisco Unified Computing System Fabric Interconnect could allow an unauthenticated, remote attacker to gain access to sensitive information and prevent the cluster service from syncing with its peers. The vulnerability is due to improper binding of the cluster service to the management interface. An attacker could exploit this vulnerability by establishing a Telnet connection to the cluster service from a remote location. A successful exploit could allow the attacker to gain access to sensitive information and modify a field that results in the cluster service unable to sync with its peers. Cisco has confirmed the vulnerability in a security notice and released software updates. To exploit this vulnerability, an attacker must be able to establish a Telnet connection to the cluster service from a remote location. It is likely that this cluster service would reside on a device in an internal trusted network to which an attacker would need access. In addition, the attacker would need to know the name or IP address associated with the targeted device in an attempt to establish a connection. It is recommended to use SSH instead of Telnet, as SSH is the more secured method of establishing remote connections. 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-Sep-27 |
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