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Category:   Application (Generic)  >   Cisco WebEx Meeting Center Vendors:   Cisco
(Cisco Issues Advisory for Cisco WebEx Meeting Center) Cisco WebEx Player Chrome Extension Special URL Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1037691
SecurityTracker URL:  http://securitytracker.com/id/1037691
CVE Reference:   CVE-2017-3823   (Links to External Site)
Date:  Jan 24 2017
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  

Description:   A vulnerability was reported in the Cisco WebEx Player Chrome Extension. A remote user can cause arbitrary code to be executed on the target user's system. Cisco WebEx Meeting Center is affected.

A remote user can create specially crafted content that, when loaded by the target user, will execute arbitrary code on the target user's system.

Content containing the URL "cwcsf-nativemsg-iframe-43c85c0d-d633-af5e-c056-32dc7efc570b.html" can trigger this flaw.

The vendor has assigned PSIRT-0085137008 to this vulnerability.

The original advisory and demonstration code is available at:

https://bugs.chromium.org/p/project-zero/issues/detail?id=1096

Impact:   A remote user can create content that, when loaded by the target user, will execute arbitrary code on the target user's system.
Solution:   The vendor has developed a fix (Cisco WebEx Extension for Google Chrome version 1.0.5) and is releasing the fix for Cisco WebEx Meetings Server and Cisco WebEx Meetings Center.

The vendor advisory is available at:

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170124-webex

Vendor URL:  tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170124-webex (Links to External Site)
Cause:   Access control error

Message History:   This archive entry is a follow-up to the message listed below.
Jan 24 2017 Cisco WebEx Player Chrome Extension Special URL Lets Remote Users Execute Arbitrary Code



 Source Message Contents

Subject:  https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170124-webex

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Cisco WebEx Browser Extension Remote Code Execution Vulnerability

Advisory ID: cisco-sa-20170124-webex 

Revision 1.0

For Public Release 2017 January 22 18:30  UTC (GMT)
Last Updated  2017 January 24 18:30  UTC (GMT)

+---------------------------------------------------------------------

Summary
=======

A vulnerability in the Cisco WebEx browser extensions provided by Cisco
WebEx Meetings Server and Cisco WebEx Meetings Center could allow an
unauthenticated, remote attacker to execute arbitrary code on a targeted
system.

The vulnerability is due to the use of a crafted pattern by the affected
software. An attacker could exploit this vulnerability by directing a
user to a web page that contains the crafted pattern and starting a
WebEx session. The WebEx session could allow the attacker to execute
arbitrary code on the affected system, which could be used to conduct
further attacks.

Cisco has begun to release software updates that address this
vulnerability. There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170124-webex

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