| Business Impact: |
|
| CVSS: |
Base Score: |
8.0 |
| |
Access Vector: |
Remote |
| Access Complexity: |
High |
| Authentication: |
Required |
| Confidentiality Impact: |
Complete |
| Integrity Impact: |
Complete |
| Availability Impact: |
Complete |
| Impact Bias: |
Normal |
| Adjusted Temporal Score: |
6.3 |
| |
Exploitability: |
Proof-of-concept |
| Remediation Level: |
Official fix |
| Report Confidence: |
Confirmed |
| Affected Products: |
Internet Explorer 6.0.2800 with WebEx ActiveX version Versions previous to ActiveX downloader 2.1.0.0.
Firefox 1.0.7 with WebEx ActiveX version previous to ActiveX downloader 2.1.0.0.
Note: Additional versions may be affected, please contact your vendor
for confirmation. |
| Technical Description: |
WebEx is a popular web conferencing solution, which allows users to share
presentation material and their desktop with other users in a virtual
meeting. It is designed to accomplish all of this without the need for
a fat client, using only the user’s browser as the client for the meeting.
WebEx uses ActiveX to download additional components needed to host or
attend a meeting. The additional components are not validated, nor the
location from which they are downloaded. This allows the attacker to create
a malicious web page that would initialize the WebEx ActiveX control, and
download and initialize a DLL of their choice. By placing malicious code
in the initialization routine of the DLL, the attacker can execute
arbitrary commands under the security context of the user viewing the web
page.
This vulnerability is dangerous due to the fact that it leverages an ActiveX
control that is trusted by most users.
|
| Symptoms: |
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| Removal instructions: |
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* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
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About IBM Security Systems
IBM Security Systems include an extensive portfolio of hardware, software solutions, professional and managed services offerings covering the spectrum of IT and business security risks: people and identity, data and information, application and process, network, server and endpoint and physical infrastructure, empowering clients to innovate and operate their businesses on the most secure infrastructure platforms. Through world-class solutions that address risk across the enterprise, IBM helps organizations build a strong security posture that helps reduce costs, improve service, and manage risk. IBM X-Force(R) Research and Development is one of the most renowned commercial security research and development groups in the world. For more information on how to address today's biggest risks, please visit us at ibm.com/security.
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