Cisco Wireless LAN Controller contains a vulnerability that could allow an unauthenticated, remote attacker to conduct cross-site scripting attacks on a targeted system. Updates are not available.
A vulnerability in the web-based management interface of the Cisco Wireless LAN Controller (WLC) could allow an unauthenticated,
remote attacker to conduct a cross-site scripting (XSS) attack against a user of the web interface of the affected system.
The vulnerability is due to insufficient input validation of a user-supplied value. An attacker could exploit this vulnerability by convincing a
user to click a crafted URL.
Cisco has confirmed the vulnerability in a security notice; however, software updates are unavailable.
At the time this alert was first published, Cisco WLC versions 3.0 through 126.96.36.199 were vulnerable. Later releases of Cisco WLC may also be vulnerable.
To exploit the vulnerability, the attacker may provide a link that directs a user to a malicious site and use misleading language or instructions to persuade the user to follow the provided link.
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-2013-5519
Customers should refer to Cisco bug ID CSCuf77810 for a complete list of affected product versions.
An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary script or HTML code in the user's browser in the security context of the affected application. This action could allow the attacker to steal sensitive browser-based information, including authentication cookies and recently submitted data, hijack user sessions, or to take actions on the site as the affected user.
Additional technical details are unavailable.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to run both firewall and antivirus applications to minimize the potential of inbound and outbound threats.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators can help protect affected systems from external attacks by using a solid firewall strategy.
Users are advised not to open email messages from suspicious or unrecognized sources. If users cannot verify that links or attachments included in email messages are safe, they are advised not to open them.
Users are advised not to open unsolicited email attachments.
Users are advised not to visit websites or follow links that have suspicious characteristics or cannot be verified as safe.
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.