Cisco Wireless LAN Controller Software contains a vulnerability that could allow an authenticated, remote attacker to execute arbitrary code on an affected device. Updates are available.
Cisco Wireless LAN Controller (WLC) Software contains a vulnerability that could allow an authenticated, remote attacker to execute arbitrary code on an affected device.
The vulnerability is due to improper sanitization of user-supplied input processed by the affected software. An authenticated, remote attacker could exploit this vulnerability by sending a crafted UserAgent string to the targeted system. The processing of the crafted string could allow the attacker to execute arbitrary code on the system, which could result in a complete system compromise.
Cisco has confirmed the vulnerability in a security advisory and released updated software.
Cisco WLC Software version 18.104.22.168 is vulnerable while running on the Cisco WLC family of products. A list of the specific products is in the "Vulnerable Products" section of the PSIRT advisory.
To exploit this vulnerability, an attacker would need to authenticate to the affected device to send crafted UserAgent strings. The device would likely reside on an internal, secure network. This access requirement may make successful exploitation difficult.
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
An authenticated, remote attacker could exploit this vulnerability to execute arbitrary code on an affected device. Successful exploitation could result in a complete system compromise of the device.
The vulnerability is due to improper sanitization of user-supplied input processed by the affected software when the HTTP Profiling feature is enabled.
An authenticated, remote attacker could exploit this vulnerability by sending a crafted UserAgent string via wired or wireless segments to a targeted system. The processing of the crafted string could allow an attacker to execute arbitrary code on the system.
Administrators are advised to apply the available software updates.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators are advised to allow only trusted users to have network access.
Administrators may consider disabling the HTTP Profiling feature in the affected software if this option is not needed.
Administrators are advised to monitor affected systems.
Cisco customers with active contracts can obtain updates through the Software Center at the following link: Cisco. Cisco customers without contracts can obtain upgrades by contacting the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via e-mail at firstname.lastname@example.org.
The security vulnerability applies to the following combinations of products.
Cisco Wireless LAN Controller (WLC)
Alerts and bulletins on the Cisco Security Intelligence Operations Portal are highlighted by analysts in the
Cisco Threat Operations Center and represent a subset of the comprehensive content that is available through Cisco Security IntelliShield Alert Manager Service.
This customizable threat and vulnerability alert service provides security staff with access to timely, accurate, and credible information about threats and vulnerabilities that may affect their environment.
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.