Cisco Security Advisory
Click Icon to Copy Verbose Score
AV:N/AC:L/Au:N/C:N/I:N/A:C/E:F/RL:OF/RC:C
-
A vulnerability in the Cisco Integrated Management Controller (Cisco IMC) SSH module of the Cisco Unified Computing System E-Series Blade servers could allow an unauthenticated, remote attacker to cause a denial of service condition.
The vulnerability is due to a failure to properly handle a crafted SSH packet. An attacker could exploit this vulnerability by sending a crafted packet to the SSH server running on the Cisco IMC of an affected device, which could result in the Cisco IMC becoming unresponsive. The operating system running on the blade will be unaffected.
Cisco has confirmed the vulnerability in a security advisory and released software updates.
To exploit this vulnerability, an attacker may need access to trusted, internal networks behind a firewall, to send crafted packets to the targeted device. This access requirement may reduce the likelihood of a successful exploit.
It is likely that recovering from a successful exploit would require a restart of the targeted device which would cause a temporary availability impact on other resources or traffic the device may provide to legitimate users. Cisco recommends utilizing an OS provided remote access method to properly shutdown the OS to prevent potential corruption of the OS before performing any recovery action if available.
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
-
Cisco has released a security advisory for Cisco bug ID CSCuo69206 at the following link: cisco-sa-20140908-ucse
-
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to allow only privileged users to access administration or management systems.
The Cisco Applied Intelligence team has created the following companion document to guide administrators in identifying and mitigating attempts to exploit this vulnerability prior to applying updated software: Identifying and Mitigating Exploitation of the Cisco Unified Computing System E-Series Cisco Integrated Management Controller SSH Denial of Service 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 email at tac@cisco.com.
-
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.
-
Show LessVersion Description Section Status Date 1.0 Initial Release NA Final 2014-Sep-05
-
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.