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Vulnerability Alert

Cisco WebEx Meetings Server Deployment Passphrase Bypass Vulnerability

 
Threat Type:CWE-255: Credentials Management
IntelliShield ID:31257
Version:1
First Published:2013 October 15 19:52 GMT
Last Published:2013 October 15 19:52 GMT
Port: Not available
CVE:CVE-2013-5529
BugTraq ID:63012
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:4.3 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:3.6
 
Version Summary:Cisco WebEx Meeting Center could allow an unauthenticated, remote attacker to bypass security restrictions and perform unauthorized actions on a targeted device. Updates are available.
 
 
Description
A vulnerability in the deployment module of Cisco WebEx Meeting Center could allow an unauthenticated, remote attacker to bypass the passphrase check during the deployment of a virtual machine.

The vulnerability is due to a flaw in the validation of the passphrase.

An attacker could exploit this vulnerability by accessing the deployment URL without the passphrase. A successful exploit could allow the attacker to start the deployment of a virtual machine or interrupt an existing deployment by resetting the status of the deployment itself. This vulnerability can be exploited only if the virtual machine is not already deployed or during the deployment itself. After the virtual machine is deployed, the deployment URL is not valid anymore so the vulnerability cannot be exploited.

Cisco has confirmed the vulnerability in a security notice and released software updates.
 
Warning Indicators
At the time this alert was first published, Cisco WebEx Meetings Server versions 1.1 and prior were vulnerable. Later releases of Cisco WebEx Meetings Server may also be vulnerable.
 
IntelliShield Analysis
To exploit this vulnerability, an attacker must know and have access to the deployment URL which typically should only be given to personnel authorized to access the network in which the targeted device may reside. These requirements would likely decrease the chances 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-2013-5529

Customers are advised to consult Cisco bug ID CSCuf52200 for the most complete list of affected product versions.
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to bypass security restrictions and performed unauthorized actions on a targeted device.
 
Technical Information
The vulnerability is due to insufficient security restrictions imposed by the affected software while validating the passphrase.

An unauthenticated, remote attacker could exploit this vulnerability by accessing the deployment URL associated to a targeted device without the passphrase. A successful exploit could allow the attacker to start the deployment of a virtual machine or interrupt an existing deployment by resetting the status of the deployment itself.
 
Safeguards
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.
 
Patches/Software
Cisco customers with active contracts should contact their Cisco support team for assistance in upgrading to a software version that includes fixes for this vulnerability. Cisco customers without contracts may contact the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via email at tac@cisco.com for assistance.
 
Alert History
 
Initial Release


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

Primary Products:
CiscoCisco WebEx Meetings Server 1.0 Base | 1.1 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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