A vulnerability in the Cisco Integrated Management Controller (IMC) of Cisco Unified Computing System (UCS) C-Series Servers could allow an unauthenticated, adjacent attacker to access specific controls on the Cisco IMC on an affected device.
The vulnerability is due to insufficient input validation for DHCP response packets. An attacker could exploit this vulnerability by sending crafted DHCP packets to the device.
Cisco has confirmed the vulnerability in a security notice; however, software updates are not available.
To exploit this vulnerability, an attacker must be on the same broadcast or collision domain as the targeted device to send crafted DHCP packets to the device. This access requirement decreases the likelihood of a successful exploit.
Customers are advised to consult Cisco bug ID CSCuf52876 for a complete list of affected product versions.
Vulnerable ProductsAt the time this alert was first published, Cisco UCS (Standalone) versions 1.4(7h) and prior were vulnerable. Later versions of Cisco UCS (Standalone) may also be vulnerable.
Products Confirmed Not VulnerableNo other Cisco products are currently known to be affected by these vulnerabilities.
Administrators are advised to contact the vendor regarding future updates and releases.
Administrators are advised to allow only trusted users to have network access.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access affected systems.
Administrators are advised to monitor affected systems.
Software updates are not 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 2015-Feb-25
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A stand-alone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy, and may lack important information or contain factual errors. The information in this document is intended for end-users of Cisco products.