Cisco ONS 15454 Transport Node Controller contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition. Updates are available.
An issue in the tNetTaskLimit process of the Cisco ONS 15454 Transport Node Controller (TNC) could allow an unauthenticated, remote attacker to cause the TNC to reload due to a watchdog timeout.
The issue is due to a packet processing services process missing health pings due to excessive traffic sent to the TNC during stability security testing and the TNC reset due to a watchdog timeout. An attacker could exploit this issue by sending high rates of data traffic to the TNC. An exploit could allow the attacker to trigger a reload of the TNC.
Cisco has confirmed the vulnerability in a security notice and released software updates.
At the time this alert was first published, Cisco ONS 15454 System Software Releases 9.6 and prior were vulnerable. Later releases of Cisco ONS 15454 System Software may also be vulnerable.
To exploit this vulnerability, it is likely that an attacker would need access to trusted, internal networks where the targeted device resides to send high rates of data traffic to the device. This access requirement may reduce 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-2013-6701
Customers are advised to consult Cisco bug ID CSCud97155 for the most complete list of affected product versions.
An unauthenticated, remote attacker could exploit this vulnerability to cause the affected device to reload, resulting in a denial of service (DoS) condition.
The vulnerability is due to a packet processing services process missing health pings because excessive traffic sent to the TNC during stability security testing and the TNC reset due to a watchdog timeout.
An unauthenticated remote attacker could exploit this vulnerability by sending high rates of data traffic to the TNC. An exploit could allow the attacker to trigger a reload of the TNC, resulting in a DoS condition.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only privileged users to access administration or management systems.
Administrators are advised to allow only trusted users to have network 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 firstname.lastname@example.org for assistance.
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.