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Vulnerability Alert

Cisco WebEx Business Suite Site Access Control Bypass Vulnerability

 
Threat Type:CWE-20: Input Validation
IntelliShield ID:32158
Version:1
First Published:2013 December 13 21:14 GMT
Last Published:2013 December 13 21:14 GMT
Port: Not available
CVE:CVE-2013-6964
BugTraq ID:64280
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Harassment
CVSS Base:4.9 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:4.7
Related Resources:
View related Security Notice
 
 
Version Summary:Cisco WebEx Business Suite contains a vulnerability that could allow an authenticated, remote attacker to inject content from an attacker-controlled WebEx site into another WebEx site. Updates are not available.
 
 
Description
A vulnerability in the site access control implementation of Cisco WebEx Business Suite could allow an authenticated, remote attacker to inject content from the attacker-controlled WebEx site into another WebEx site.

The vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by using a crafted URL to inject content from the attacker-controlled WebEx site into another WebEx site.

Cisco has confirmed the vulnerability in a security notice; however, software updates are not available.
 
Warning Indicators
The following Cisco WebEx Business Suite products are affected:
  • Cisco WebEx Event Center
  • Cisco WebEx Meeting Center
  • Cisco WebEx Sales Center
  • Cisco WebEx Support Center
  • Cisco WebEx Training Center
 
IntelliShield Analysis
To exploit this vulnerability, an attacker must authenticate to the targeted device. This access requirement limits 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.
 
Vendor Announcements
Cisco has released a security notice at the following link: CVE-2013-6964

Customers are advised to consult Cisco bug ID CSCul36197 for the most complete list of affected product versions.
 
Impact
An authenticated, remote attacker could exploit this vulnerability to inject content from an attacker-controlled WebEx site into another WebEx site. A successful exploit could be leveraged to conduct further attacks.
 
Technical Information
The vulnerability is due to insufficient validation of user-supplied input.

An authenticated, remote attacker could exploit this vulnerability by using a crafted URL to inject content from the attacker-controlled WebEx site into another WebEx site. A successful exploit could be leveraged 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 Event Center Original Release Base
CiscoCisco WebEx Meeting Center Original Release Base
CiscoCisco WebEx Sales Center Original Release Base
CiscoCisco WebEx Support Center Original Release Base
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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