WebEx ActiveX control DLL code execution
| web-conferencing-code-injection (24370) |  High Risk |
Description:
The WebEx ActiveX control could allow a remote attacker to execute arbitrary code on a victim's system. WebEx uses ActiveX to download additional components needed to host or attend a Web conference. The additional components are not validated, nor the location from which they are downloaded. This could allow the attacker to create a malicious Web page that would initialize the WebEx ActiveX control, and download and initialize a DLL of their choice, once a victim visits the page. By placing malicious code in the initialization routine of the DLL, the attacker could execute arbitrary code under the security context of the user viewing the malicious Web page.
*CVSS:
| Base Score: | 8 |
| Access Vector: | Remote |
| Access Complexity: | High |
| Authentication: | Not Required |
| Confidentiality Impact: | Complete |
| Integrity Impact: | Complete |
| Availability Impact: | Complete |
| Temporal Score: | 5.9 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Gain Access
Remedy:
Upgrade to the latest version of the WebEx ActiveX control for Microsoft Internet Explorer or Mozilla Firefox (2.1.0.0 or later), available from the WebEx Communications, Inc. Web site. See References.
References:
- Internet Security Systems Protection Advisory July 6, 2006: WebEx ActiveX Control DLL Injection.
- WebEx Communications, Inc. Web site: Security Update.
- ZDI-06-021: WebEx Downloader Plug-in Code Execution Vulnerability.
- BID-18860: WebEx ActiveX Multiple Remote Code Execution Vulnerabilities
- CVE-2006-3423: WebEx Downloader ActiveX Control and WebEx Downloader Java before 2.1.0.0 do not validate downloaded components, which allows remote attackers to execute arbitrary code via a website that activates the GpcUrlRoot and GpcIniFileName ActiveX controls to cause the client to download a DLL file.
- OSVDB ID: 27039: WebEx Downloader Plug-in ActiveX/Java Source Subversion Arbitrary Program Execution
- OSVDB ID: 27040: WebEx Downloader Plug-in ActiveX Unspecified Remote Code Execution
- SA20956: WebEx Downloader Plug-in Multiple Vulnerabilities
- SECTRACK ID: 1016446: WebEx Downloader Lets Remote Users Download and Execute Arbitrary Files
- VUPEN/ADV-2006-2688: WebEx ActiveX Control Components Download Remote Code Execution Vulnerability
Platforms Affected:
- WebEx Communications WebEx ActiveX control prior to 2.1.0.0
Reported:
Jul 06, 2006
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.