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AUSCERT External Security Bulletin Redistribution
ESB-2018.2799
Cisco Webex Network Recording Player Remote Code Execution Vulnerabilities
20 September 2018
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Webex Network Recording Player
Publisher: Cisco Systems
Operating System: Windows
OS X
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2018-15422 CVE-2018-15421 CVE-2018-15414
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180919-webex
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Cisco Security Advisory
Cisco Webex Network Recording Player Remote Code Execution Vulnerabilities
High
Advisory ID: cisco-sa-20180919-webex
First Published: 2018 September 19 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvj63665, CSCvj63672, CSCvj63676, CSCvj63717,
CSCvj63724, CSCvj63729, CSCvj67334, CSCvj67339,
CSCvj67344
CVSS Score: Base 7.8
CVSS: 3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X
CVE-2018-15414
CVE-2018-15421
CVE-2018-15422
CWE-20
Summary
* Multiple vulnerabilities in the Cisco Webex Network Recording Player for
Advanced Recording Format (ARF) could allow an unauthenticated, remote
attacker to execute arbitrary code on a targeted system.
The vulnerabilities are due to improper validation of Webex recording
files. An attacker could exploit these vulnerabilities by sending a user a
link or email attachment containing a malicious file and persuading the
user to open the file in the Cisco Webex Player. A successful exploit could
allow the attacker to execute arbitrary code on an affected system.
Cisco has released software updates that address these vulnerabilities.
There are no workarounds that address these vulnerabilities.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180919-webex
Affected Products
* Vulnerable Products
These vulnerabilities affect ARF recording players available from Cisco
Webex Meetings Suite sites, Cisco Webex Meetings Online sites, and Cisco
Webex Meetings Server. The following versions of ARF recording players are
affected:
+ Cisco Webex Meetings Suite (WBS32) - Webex Network Recording Player
versions prior to WBS32.15.10
+ Cisco Webex Meetings Suite (WBS33) - Webex Network Recording Player
versions prior to WBS33.3
+ Cisco Webex Meetings Online - Webex Network Recording Player versions
prior to 1.3.37
+ Cisco Webex Meetings Server - Webex Network Recording Player versions
prior to 3.0MR2
To determine which version of the Cisco Webex Network Recording Player (for
.arf files) is installed, users can open the player and select the Help >
About menu.
Note: Customers who do not receive automatic software updates may be
running versions of Cisco Webex Meetings that have reached end of software
maintenance and should contact customer support.
For information about which Cisco Webex Network Recording Player releases
are vulnerable, see the Fixed Software section of this advisory.
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by these vulnerabilities.
Details
* The Cisco Webex Meetings Suite services and Cisco WebEx Meetings Online are
hosted multimedia conferencing solutions that are managed and maintained by
Cisco Webex. Cisco Webex Meetings Server is a multimedia conferencing
solution that customers can host in their private clouds.
Cisco Webex Meetings services can be configured to allow recording of a
meeting that is stored online and can be downloaded by a user in ARF
format. These services can also record meetings directly on local computers
in WRF format. The Cisco Webex Network Recording Player plays .arf files
and the Cisco Webex Player plays .wrf files.
The Network Recording Player can be automatically installed when a user
accesses a recording file that is hosted on a Cisco Webex Meetings Suite
site (for streaming playback mode). The Cisco Webex Network Recording
Player can also be installed manually. The Cisco Webex Player can only be
manually installed from the Webex site.
The Cisco Webex Network Recording Player for .arf files is available for
Cisco Webex Meetings Suite (WBS31, WBS32, WBS33), Cisco Webex Meetings
Online, and for Cisco Webex Meetings Server. The Cisco Webex Player for
.wrf files is only available for Cisco Webex Meetings Suite (WBS31, WBS32,
and WBS33) and Cisco Webex Meetings Online. The Cisco Webex Player for .wrf
files is not available for Cisco Webex Meetings Server.
The vulnerabilities disclosed in this advisory affect the Cisco Webex
Network Recording Player. Windows, OS X, and Linux versions of the players
are all affected by at least one vulnerability described in this advisory.
Workarounds
* There are no workarounds that address these vulnerabilities. However, it is
possible to remove the affected Cisco Webex Network Recording Player and
Cisco Webex Player by following the uninstall procedure for the operating
system. For example, in Windows, use Add or Remove Programs to uninstall
the affected players.
To remove Webex software completely from a system, use the Meeting Services
Removal Tool (for Microsoft Windows users) or Mac Webex Meeting Application
Uninstaller (for Apple Mac OS X users), available for download from the
Cisco Collaboration Help article Cisco WebEx and 3rd Party Support
Utilities.
Removal of the Webex software from a Linux or UNIX-based system can be
accomplished by following the steps in the Cisco Collaboration Help article
How Do I Uninstall WebEx Software on a Linux or Unix Based System?
Fixed Software
* Cisco has released free software updates that address the vulnerabilities
described in this advisory. Customers may only install and expect support
for software versions and feature sets for which they have purchased a
license. By installing, downloading, accessing, or otherwise using such
software upgrades, customers agree to follow the terms of the Cisco
software license:
https://www.cisco.com/c/en/us/products/end-user-license-agreement.html
Additionally, customers may only download software for which they have a
valid license, procured from Cisco directly, or through a Cisco authorized
reseller or partner. In most cases this will be a maintenance upgrade to
software that was previously purchased. Free security software updates do
not entitle customers to a new software license, additional software
feature sets, or major revision upgrades.
When considering software upgrades, customers are advised to regularly
consult the advisories for Cisco products, which are available from the
Cisco Security Advisories and Alerts page, to determine exposure and a
complete upgrade solution.
In all cases, customers should ensure that the devices to be upgraded
contain sufficient memory and confirm that current hardware and software
configurations will continue to be supported properly by the new release.
If the information is not clear, customers are advised to contact the Cisco
Technical Assistance Center (TAC) or their contracted maintenance
providers.
Customers Without Service Contracts
Customers who purchase directly from Cisco but do not hold a Cisco service
contract and customers who make purchases through third-party vendors but
are unsuccessful in obtaining fixed software through their point of sale
should obtain upgrades by contacting the Cisco TAC:
https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html
Customers should have the product serial number available and be prepared
to provide the URL of this advisory as evidence of entitlement to a free
upgrade.
Fixed Releases
The following versions of the Cisco Webex Network Recording Player
available from the Cisco Webex Meetings Suite sites (WBS32, WBS33), Cisco
Webex Meetings Online site, and Cisco Webex Meetings Server address all the
vulnerabilities described in this advisory:
+ Cisco Webex Meetings Suite (WBS32) - Cisco Webex Network Recording
Player versions WBS32.15.10 and later
+ Cisco Webex Meetings Suite (WBS33) - Cisco Webex Network Recording
Player versions WBS33.3 and later
+ Cisco Webex Meetings Online - Webex Network Recording Player versions
1.3.37 and later
+ Cisco Webex Meetings Server - Webex Network Recording Player versions
3.0MR2 and later
Alternatively, the latest versions of the ARF player are available from
http://www.webex.com/play-webex-recording.html.
The Cisco Webex Network Recording Player (for .arf files) will be
automatically upgraded to the latest, non-vulnerable version when users
access a recording file that is hosted on a Cisco Webex Meetings site that
contains the versions previously specified. Users will need to manually
uninstall the Cisco Webex Player and get the updated version of the Cisco
Webex Player from http://www.webex.com/play-webex-recording.html or from a
Cisco Webex Meetings site specified previously.
Note: Customers on lockdown sites will not automatically get updated
versions of the Cisco Webex Network Recording Player. Contact Webex Support
to update a Cisco Webex site and get the updated version of the Cisco Webex
Recording Players from http://www.webex.com/play-webex-recording.html.
Customers are advised to upgrade to an appropriate release as indicated in
the following table:
Cisco Bug Fixed Releases
ID WBS32 WBS33 Webex Meetings Server Webex Meetings Online
CVE-2018-15414
CSCvj63717 32.15.10 or later 33.3 or later
CSCvj63724 3.0MR2
CSCvj63729 1.3.37
CVE-2018-15421
CSCvj67334 32.15.10 or later 33.3 or later
CSCvj67339 3.0MR2
CSCvj67344 1.3.37
CVE-2018-15422
CSCvj63665 32.15.10 or later 33.3 or
CSCvj63672 3.0MR2
CSCvj63676 1.3.37
Exploitation and Public Announcements
* The Cisco Product Security Incident Response Team (PSIRT) is not aware of
any public announcements or malicious use of the vulnerabilities that are
described in this advisory.
Source
* Cisco would like to thank Steven Seeley (mr_me) of Source Incite working
with Trend Micro's Zero Day Initiative for reporting vulnerabilities
CVE-2018-15414 and CVE-2018-15422.
Cisco would like to thank Ziad Badawi working with Trend Micro's Zero Day
Initiative for reporting CVE-2018-15421.
Cisco Security Vulnerability Policy
* To learn about Cisco security vulnerability disclosure policies and
publications, see the Security Vulnerability Policy. This document also
contains instructions for obtaining fixed software and receiving security
vulnerability information from Cisco.
Subscribe to Cisco Security Notifications
* Subscribe
URL
* https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20180919-webex
Revision History
+----------------------------------------------------------------------------+
| Version | Description | Section | Status | Date |
|---------+--------------------------+---------+--------+--------------------|
| 1.0 | Initial public release. | ? | Final | 2018-September-19 |
+----------------------------------------------------------------------------+
Legal Disclaimer
* THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND
OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT
OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES
THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits the
distribution URL is an uncontrolled copy and may lack important information
or contain factual errors. The information in this document is intended for
end users of Cisco products.
Cisco Security Vulnerability Policy
* To learn about Cisco security vulnerability disclosure policies and
publications, see the Security Vulnerability Policy. This document also
contains instructions for obtaining fixed software and receiving security
vulnerability information from Cisco.
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