Cisco uBR10000 Series Universal Broadband Routers contain a vulnerability that could allow an unauthenticated, adjacent attacker to cause a denial of service condition. Updates are available.
Cisco uBR10000 Series Universal Broadband Routers contain a vulnerability that could allow an unauthenticated, adjacent attacker to trigger the reload of the routing engine on the affected device.
An attacker could exploit this vulnerability by manipulating IPv4 and IPv6 address assignments on a dual-stack modem connected to the affected device.
Cisco has confirmed the vulnerability in a security notice and software updates are available.
At the time this alert was first published, Cisco uBR10000 Series devices running Cisco IOS Software Releases 15.3(3)S and prior were vulnerable. Later Cisco IOS Software releases running on Cisco uBR10000 Series devices may also be affected.
To exploit the vulnerability, a dual-stack modem must be connected to an affected device. In addition, an attacker must have access to a trusted, internal network to manipulate the modem in a manner to trigger the vulnerability. This access requirement may reduce the likelihood of a successful attack.
An unauthenticated, adjacent attacker could exploit this vulnerability to cause the routing engine on an affected device to reload, resulting in a DoS condition.
The vulnerability is due to insufficient validation of user-supplied input by the routing engine on the affected device.
An unauthenticated, adjacent attacker could exploit this vulnerability by manipulating IPv4 and IPv6 address assignments on a dual-stack modem connected to the affected device. If successful, the attacker could cause the routing engine on the affected device to reload, 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 e-mail at firstname.lastname@example.org for assistance.
The security vulnerability applies to the following combinations of products.
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.