Cisco Unified Computing System (UCS) Software contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition. Updates are available.
Cisco UCS Manager contains a denial of service vulnerability in the management API. An unauthenticated, remote attacker who can submit a properly malformed request to the XML API management service of the Cisco UCS Manager could cause the service to stop responding. As a result, administrators could not make configuration changes or perform management actions on the Fabric Interconnect and computing resources managed by the device. A restart of the Fabric Interconnect is required to restore functionality.
Cisco has confirmed the vulnerability in a security advisory and has released software updates.
The following versions of Cisco UCS are vulnerable:
Versions prior to 1.2(1b)
All 1.0 versions
All 1.1 versions
It is likely that an attacker would need access to an internal, private network to send requests to the XML API management service of a 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.
An unauthenticated, remote attacker could exploit this vulnerability to cause a targeted device to stop responding, resulting in a denial of service (DoS) condition.
The vulnerability is due to insufficient validation of user-supplied input in the management API of the affected software.
An unauthenticated, remote attacker could exploit this vulnerability by submitting a malformed request to the XML API management service of a targeted device. Processing the malformed request could cause the device to stop responding, resulting in a DoS condition.
Administrators are advised to apply the appropriate updates.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators are advised to implement an intrusion prevention system (IPS) or intrusion detection system (IDS) to help detect and prevent attacks that attempt to exploit this vulnerability.
Administrators are advised to monitor affected systems.
Cisco customers with active contracts can obtain updates through the Software Center at the following link: Cisco. Cisco customers without contracts can obtain upgrades by contacting the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via e-mail at firstname.lastname@example.org.
The security vulnerability applies to the following combinations of products.
Cisco Unified Computing System (Managed)
1.0 Base, (2k) | 1.1 Base, (1m) | 1.2 Base
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