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AUSCERT External Security Bulletin Redistribution
ESB-2019.2994
Cisco Webex Network Recording Player and Cisco Webex Player
Arbitrary Code Execution Vulnerabilities
8 August 2019
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Webex Network Recording Player
Cisco Webex Player Arbitrary
Publisher: Cisco Systems
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2019-1929 CVE-2019-1928 CVE-2019-1927
CVE-2019-1926 CVE-2019-1925 CVE-2019-1924
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190807-webex-player
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Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code
Execution Vulnerabilities
Priority: High
Advisory ID: cisco-sa-20190807-webex-player
First Published: 2019 August 7 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvo92955 CSCvo92956 CSCvo92959 CSCvp66238CSCvp67498
CSCvp67503 CSCvp68615 CSCvp68659CSCvp68684 CSCvp70844
CSCvp70849 CSCvp70858CSCvp70864 CSCvp70872 CSCvp70879
CSCvq09094CSCvq09096 CSCvq09101
CWE-119
CVSS Score:
7.8 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X
Summary
o Multiple vulnerabilities in Cisco Webex Network Recording Player for
Microsoft Windows and Cisco Webex Player for Microsoft Windows could allow
an attacker to execute arbitrary code on an affected system.
The vulnerabilities exist because the affected software improperly
validates Advanced Recording Format (ARF) and Webex Recording Format (WRF)
files. An attacker could exploit these vulnerabilities by sending a user a
malicious ARF or WRF file through a link or email attachment and persuading
the user to open the file with the affected software on the local system. A
successful exploit could allow the attacker to execute arbitrary code on
the affected system with the privileges of the targeted user.
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-20190807-webex-player
Affected Products
o Vulnerable Products
These vulnerabilities affect the following versions of Cisco Webex Network
Recording Player for Microsoft Windows and Cisco Webex Player for Microsoft
Windows, which are available from Cisco Webex Business Suite sites, Cisco
Webex Meetings Online sites, and Cisco Webex Meetings Server:
Cisco Webex Business Suite sites - all Webex Network Recording Player
and Webex Player releases earlier than Release WBS 39.5.5
Cisco Webex Meetings Online - all Webex Network Recording Player and
Webex Player releases earlier than Release 1.3.43
Cisco Webex Meetings Server - all Webex Network Recording Player
releases earlier than Release 2.8MR3Patch3, 3.0MR2Patch4, 4.0, or
4.0MR1
To determine which release of Cisco Webex Network Recording Player or Cisco
Webex Player is installed on a system, users can open the player and choose
Help > About .
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by these vulnerabilities.
Cisco has confirmed that these vulnerabilities do not affect Cisco Webex
Player for macOS.
Details
o Cisco Webex Business 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 host, manage, and maintain in their private clouds.
Cisco Webex Business Suite services can be configured to allow users to
store meeting recordings online and download those recordings as ARF files.
These services can also be configured to allow users to record meetings
directly on their local computers as WRF files.
Cisco Webex Network Recording Player is the application that is used to
play back ARF files. It is available from Cisco Webex Business Suite sites,
Cisco Webex Meetings Online, and Cisco Webex Meetings Server. The player
can be installed manually from the Cisco Webex website, from a user's Webex
site, or automatically when a user accesses an ARF file for streaming
playback from a Cisco Webex Business Suite site.
Cisco Webex Player is the application that is used to play back WRF files.
It is available from Cisco Webex Business Suite sites and Cisco Webex
Meetings Online. It is not available from Cisco Webex Meetings Server. The
player can also be installed manually from the Cisco Webex website or from
a user's Webex site.
Workarounds
o There are no workarounds that address these vulnerabilities.
Fixed Software
o 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
Customers are advised to upgrade to an appropriate fixed software release
as indicated in the following table:
First Fixed Release for These Vulnerabilities
Webex Business Webex Business Webex
Suite WBS Latest Suite WBS 39.5.x Meetings Webex Meetings
CVE ID Sites Sites Online Server
CVE-2019-1924 39.6.0 39.5.0.632 1.3.43 2.8MR3Patch3,
3.0MR2Patch4
CVE-2019-1925 39.6.0 39.5.0.581 1.3.43 2.8MR3Patch3,
3.0MR2Patch4
2.8MR3Patch3,
CVE-2019-1926 39.6.0 39.3.0.499 1.3.43 3.0MR2Patch4,
4.0
CVE-2019-1927 39.6.0 39.5.0.581 1.3.43 2.8MR3Patch3,
3.0MR2Patch4
CVE-2019-1928 39.6.0 39.5.5 1.3.43 2.8MR3Patch3,
3.0MR2Patch4
CVE-2019-1929 39.6.0 39.5.5 1.3.43 4.0MR1
Exploitation and Public Announcements
o 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
o Cisco would like to thank Yici Wang and Kushal Arvind Shah of Fortinet's
FortiGuard Labs for reporting these vulnerabilities.
Cisco Security Vulnerability Policy
o 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.
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20190807-webex-player
Revision History
o +---------+--------------------------+---------+--------+-----------------+
| Version | Description | Section | Status | Date |
+---------+--------------------------+---------+--------+-----------------+
| 1.0 | Initial public release. | - | Final | 2019-August-07 |
+---------+--------------------------+---------+--------+-----------------+
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