TippingPoint Zero Day Initiative

Cisco WebEx Network Recording Player Command Injection Remote Code Execution Vulnerability

ZDI-17-933: December 6th, 2017


CVSS Score

Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 29640. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Cisco WebEx Network Recording Player. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the wbx URI handler. When parsing the register parameter, the process does not properly validate a user-supplied string before using it to execute a system command. An attacker can leverage this vulnerability to execute commands under the context of the current user.

Vendor Response

Cisco has issued an update to correct this vulnerability. More details can be found at:

Disclosure Timeline

    2017-08-10 - Vulnerability reported to vendor
    2017-12-06 - Coordinated public release of advisory


This vulnerability was discovered by: