Cisco WebEx WRF Player contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on a targeted system. Updates are available.
A vulnerability in the Cisco WebEx Advanced Recording Format (ARF) player used in Cisco WebEx Business Suite, Cisco WebEx 11, and the Cisco WebEx Meetings Server could allow an unauthenticated, remote attacker to crash the Cisco WebEx ARF player, and in some cases execute remote code with the privilege of the logged in user.
The vulnerability is due to a failure to properly validate input from the .arf recording being played. An attacker could exploit this vulnerability by persuading a user to play a specially crafted .arf recording in a vulnerable Cisco WebEx ARF player. This vulnerability cannot be triggered just by attending a WebEx meeting.
Cisco has confirmed the vulnerability in a security advisory and has released software updates.
Cisco has published a list of affected WebEx WRF Player releases in the security advisory. The Vendor Announcements section of this alert contains a link to the advisory.
To exploit this vulnerability, an attacker may require access to trusted, internal networks to send crafted requests to the affected software. This access requirement could limit the likelihood of a successful exploit.
Cisco indicates through the CVSS score that PoC exploit code exists; however, the code is not known to be publicly available.
An unauthenticated, remote attacker could exploit this vulnerability to cause a DoS condition or potentially execute arbitrary code with the privileges of the user on a targeted system. If the user holds elevated privileges, the attacker could completely compromise the system.
Additional technical details are unavailable.
Microsoft Windows and Apple Mac OS X Administrators may consider removing all WebEx software completely from a system using the Meeting Services Removal Tool (for Microsoft Windows users) or the Mac Cisco-WebEx Uninstaller (for Apple Mac OS X users), available at http://support.webex.com/support/downloads.html.
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 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 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.