Cisco IOS Software and Cisco IOS XE Software contains a vulnerability that could allow an unauthenticated, adjacent attacker to cause a denial of service condition. Updates are available.
A vulnerability in the IP Device Tracking (IPDT) function of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause an affected device to reload.
The vulnerability is due to AVL tree corruption in IPDT. An attacker could exploit this vulnerability by sending a specific set of ARP packets to an affected device. An exploit could allow the attacker to cause the device to reload.
Cisco has confirmed the vulnerability in a security notice and released software updates.
At the time this alert was first published, the following releases of Cisco products were vulnerable. Later releases of Cisco products may also be affected.
Cisco IOS Software Release 15.2(1)E and prior
Cisco IOS XE Software Release 3.3XO and prior
To exploit this vulnerability, an attacker would need access to the same broadcast or collision domain of the targeted device. This access requirement decreases 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-2013-6705
Customers are advised to consult Cisco bug ID CSCuh38133 for the most complete list of affected product versions.
An unauthenticated, adjacent attacker could exploit this vulnerability to cause an affected device to reload, resulting in a denial of service (DoS) condition.
The vulnerability is due to AVL tree corruption in IPDT by the affected software.
An unauthenticated, adjacent attacker could exploit this vulnerability by sending a specific set of ARP packets to an affected device. An exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.
Administrators are advised to apply the appropriate updates.
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 the affected systems.
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 IOS XE Software
3.2SE .0, .1, .2, .3 | 3.3XO .0
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.