Cisco Nexus 7000 Series Switches contain a vulnerability that could allow a local attacker to cause a denial of service condition. Updates are available.
A vulnerability in Cisco Nexus 7000 Series Switches could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected device.
The vulnerability is due to an error in input validation for the sed command. An attacker could exploit this vulnerability by passing crafted input to the sed command. An exploit could allow the attacker to cause a DoS condition.
Cisco has confirmed the vulnerability in a security notice and released software updates.
At the time this alert was first published, Cisco NX-OS Software for Nexus 7000 Series Release 6.2(2) is vulnerable. Later releases may also be vulnerable.
To exploit this vulnerability, an attacker would need local access to the targeted device. This access requirement reduces 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.
Cisco has released a security notice at the following link: CVE-2014-0684
Customers are advised to consult Cisco bug ID CSCui56136 for a complete list of affected product versions.
A local attacker could exploit this vulnerability to cause an affected device to become unresponsive or crash, resulting in a DoS condition.
The vulnerability is due to an error in input validation for the sed command by a Cisco Nexus 7000 device running the affected Cisco NX-OS Software.
A local attacker could exploit this vulnerability by passing crafted input to the sed command on a targeted device. An exploit could allow the attacker to cause a DoS condition on the device.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have local access.
Administrators are advised to monitor affected systems.
Cisco customers with active contracts should contact their Cisco support team for assistance in upgrading to a software version that includes fixes for this vulnerability. Cisco customers without contracts may contact the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via email at email@example.com for assistance.
The security vulnerability applies to the following combinations of products.
Cisco NX-OS Software
for Nexus 7000 Series 6.2(2)
The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.