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Insecure Library Loading
Highly critical

Webex Meeting Manager WebexUCFObject ActiveX Control Buffer Overflow

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Release Date:  2008-08-07    Last Update:  2008-08-18    Views:  11,549

Secunia Advisory SA31397

Where:

From remote

Impact:

System access

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Elazar Broad has discovered a vulnerability in Webex Meeting Manager, which can be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to a boundary error within the WebexUCFObject ActiveX control (atucfobj.dll) when handling arguments passed to the "NewObject()" method. This can be exploited to cause a stack-based buffer overflow by passing an overly long string as argument to the affected method.

Successful exploitation allows execution of arbitrary code.

The vulnerability is confirmed in version 20.2008.2601.4928. Other versions may also be affected.


Solution:
An update should be applied automatically when visiting an upgraded WebEx meeting service server. Please see vendor advisory for further details.

Provided and/or discovered by:
Elazar Broad

Original Advisory:
Cisco:
http://www.cisco.com/warp/public/707/cisco-sa-20080814-webex.shtml

Elazar Broad:
http://lists.grok.org.uk/pipermail/full-disclosure/2008-August/063692.html

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Webex Meeting Manager WebexUCFObject ActiveX Control Buffer Overflow

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