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Vulnerability Alert

Cisco WebEx Training Center Bypass Email Verification to Join Audio Conference Vulnerability

 
Threat Type:CWE-200: Information Leak / Disclosure
IntelliShield ID:32157
Version:1
First Published:2013 December 13 19:12 GMT
Last Published:2013 December 13 19:12 GMT
Port: Not available
CVE:CVE-2013-6965
BugTraq ID:64281
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Harassment
CVSS Base:5.0 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:4.8
 
Version Summary:Cisco WebEx Training Center contains a vulnerability that could allow an unauthenticated, remote attacker to gain access to sensitive information. Updates are not available.
 
 
Description
A vulnerability in the training center registration page of Cisco WebEx Training Center could allow an unauthenticated, remote attacker to attend the audio conference for a training session without having to confirm the email address.

The vulnerability is due to the disclosure of the training session information URL before registration is complete. An attacker could exploit this vulnerability by gathering the training session access code and password from the disclosed URL and using the information to join the audio conference for a training session without receiving the registration email.

Cisco has confirmed the vulnerability in a security notice; however, software updates are not available.
 
Warning Indicators
Cisco WebEx Training Center is vulnerable.
 
IntelliShield Analysis
To exploit this vulnerability, it is likely that an attacker would need access to the training session URL prior to an exploit attempt. In a typical enterprise environment, the training session URL would originate from a device located on a trusted, internal network, reducing the possibility of a successful attack.

Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
 
Vendor Announcements
Cisco has released a security notice at the following link: CVE-2013-6965

Customers are advised to consult Cisco bug ID CSCul36183 for the most complete list of affected product versions.
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability gain access to sensitive information that could be leveraged to conduct further attacks.
 
Technical Information
The vulnerability is due to insufficient security restrictions imposed by the training registration page in Cisco WebEx Training Center.

An unauthenticated, remote attacker could exploit this vulnerability by gathering the training session access code and password from the disclosed URL and using the information to join the audio conference for a training session without receiving the registration email. A successful exploit could be used to conduct further attacks.
 
Safeguards
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.
 
Patches/Software
Software updates are not available.
 
Alert History
 
Initial Release


Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
CiscoCisco WebEx Training Center Original Release Base

Associated Products:
N/A




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.


LEGAL DISCLAIMER
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.
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