Cisco WebEx Training Center contains a vulnerability that could allow an unauthenticated, remote attacker to gain access to sensitive information. Updates are not available.
A vulnerability in the training registration page in Cisco WebEx Training Center could allow an unauthenticated, remote attacker to enumerate email addresses of registered attendees.
The vulnerability is due to registration error messages that allow a user to determine that an email address supplied during registration has already been specified by another registered attendee. An attacker could exploit this vulnerability by submitting multiple registration requests and viewing the resulting error messages to determine which email addresses have been submitted by other registered attendees.
Cisco has confirmed the vulnerability in a security notice; however, software updates are not available.
Cisco WebEx Training Center is vulnerable.
To exploit this vulnerability, it is likely that an attacker would need access to trusted, internal networks in which the targeted device may reside, to submit registration request and also view the error messages. This access requirement reduces the possibility 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-2013-6968
Customers are advised to consult Cisco bug ID CSCul36003 for the most complete list of affected product versions.
An unauthenticated, remote attacker could exploit this vulnerability gain access to sensitive information that could be leveraged to conduct further attacks.
The vulnerability is due to an unspecified error in the training registration page in Cisco WebEx Training Center while displaying registration error messages.
An unauthenticated, remote attacker could exploit this vulnerability by submitting multiple registration requests and viewing the resulting error messages to determine which email addresses have been submitted by other registered attendees. A successful exploit could aid an attacker in conducting further attacks.
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 security vulnerability applies to the following combinations of products.
Cisco WebEx Training Center
Original Release Base
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.