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.
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.
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.
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.
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.
An unauthenticated, remote attacker could exploit this vulnerability to bypass security restrictions and performed unauthorized actions on a targeted device.
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.
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 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 firstname.lastname@example.org for assistance.
The security vulnerability applies to the following combinations of products.
Cisco WebEx Meetings Server
1.0 Base | 1.1 Base
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