Cisco Wireless LAN Controller contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition. Updates are not available.
A vulnerability in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol of the Cisco Wireless LAN Controller (WLC) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.
The vulnerability is due to insufficient data packet validation. An attacker could exploit this vulnerability by sending a crafted CAPWAP packet to the Cisco WLC.
Cisco has confirmed the vulnerability in a security notice; however, software updates are not available.
At the time this alert was first published, Cisco WLC versions 7.4(.110) and prior were vulnerable. Later releases of Cisco WLC may also be vulnerable.
To exploit this vulnerability, the attacker may need access to trusted, internal networks in which the targeted device may reside to send crafted CAPWAP packets to the device. This access requirement may reduce the likelihood of a successful exploit.
Cisco has released a security notice at the following link: CVE-2013-6699
Customers are advised to consult Cisco bug ID CSCuh81880 for a complete list of affected product versions.
An unauthenticated, remote attacker could exploit this vulnerability to cause an affected device to crash or become unresponsive, resulting in a DoS condition.
The vulnerability is due to insufficient validation of data packets by the affected software.
An unauthenticated, remote attacker could exploit this vulnerability by sending a crafted CAPWAP packet to the targeted device. Processing the crafted packet could cause the device to crash or become unresponsive, resulting in a DoS condition.
Administrators are advised to contact the vendor regarding future updates and releases.
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.
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.