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LinkedIn Internet Explorer Toolbar IEContextMenu ActiveX Control Code Execution
Secunia Advisory: SA26181
Release Date: 2007-07-24
Last Update: 2007-07-27
Popularity: 12,374 views

Critical:
Extremely critical
Impact: System access
Where: From remote
Solution Status: Vendor Patch

Software:LinkedIn Internet Explorer Toolbar 3.x

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CVE reference:CVE-2007-3955


Description:
Jared DeMott and Justin Seitz have discovered a vulnerability in LinkedIn Internet Explorer Toolbar, which can be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to an error within the IEToolbar.IEContextMenu.1 (LinkedInIEToolbar.dll) when handling the "Search()" method, which takes in a VARIANT as the "varBrowser" argument. This can be exploited to execute arbitrary code when a user e.g. visits a malicious website.

The vulnerability is confirmed in version 3.0.2.1098. Other versions may also be affected.

NOTE: Working exploit code is publicly available.

Solution:
Update to the latest version.
http://www.linkedin.com/static?key=browser_toolbar_download

Provided and/or discovered by:
Jared DeMott and Justin Seitz, VDA Labs

Changelog:
2007-07-27: Updated "Solution" section.
2007-07-27: Added CVE reference.

Original Advisory:
http://www.vdalabs.com/tools/linkedin.html

Extended Solution:
The "Extended Solution" section is available for Secunia customers only. Request a trial and get access to the Secunia Customer Area and Extended Secunia advisories.


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