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AUSCERT External Security Bulletin Redistribution
ESB-2017.3057.2
cisco-sa-20171129-wmc
13 December 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco WebEx Meeting Center
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Unauthorised Access -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2017-12297
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171129-wmc
Revision History: December 13 2017: Updated source with fixed and
vulnerable releases
November 30 2017: Initial Release
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Multiple Vulnerabilities in Cisco WebEx Recording Format and Advanced Recording
Format Players
Severity: Critical
Advisory ID: cisco-sa-20171129-webex-players
First Published: 2017 November 29 16:00 GMT
Last Updated: 2017 December 12 01:12 GMT
Version 1.4: Final
Workarounds: No workarounds available
Cisco Bug IDs:
CSCve02843 CSCve10584 CSCve10591 CSCve02843 CSCve10584 CSCve10591 CSCve10658
CSCve10744 CSCve10749 CSCve10762 CSCve10764 CSCve11503 CSCve11507 CSCve11532
CSCve11538 CSCve11545 CSCve11548 CSCve30208 CSCve30214 CSCve30268 CSCvf38060
CSCvf38077 CSCvf38084 CSCvf49650 CSCvf49697 CSCvf49707 CSCvf57234 CSCvg54836
CSCvg54843 CSCvg54850 CSCvg54853 CSCvg54856 CSCvg54861 CSCvg54867 CSCvg54868
CSCvg54870 CVE-2017-12367 CVE-2017-12368 CVE-2017-12369
CVE-2017-12367 CVE-2017-12368 CVE-2017-12369 CVE-2017-12370 CVE-2017-12371
CVE-2017-12372 CWE-119 CWE-125 CWE-20
CVSS Score: Base 9.6
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:X/RL:X/RC:X
CVE-2017-12367 CVE-2017-12368 CVE-2017-12369 CVE-2017-12367 CVE-2017-12368
CVE-2017-12369 CVE-2017-12370 CVE-2017-12371 CVE-2017-12372 CWE-119
CWE-125 CWE-20
Summary
* Multiple vulnerabilities exist in Cisco WebEx Network Recording Player for
Advanced Recording Format (ARF) and WebEx Recording Format (WRF) files. A
remote attacker could exploit these vulnerabilities by providing a user
with a malicious ARF or WRF file via email or URL and convincing the user
to launch the file. Exploitation of these vulnerabilities could cause an
affected player to crash and, in some cases, could allow arbitrary code
execution on the system of a targeted user.
The Cisco WebEx players are applications that are used to play back WebEx
meeting recordings that have been recorded by an online meeting attendee.
The player can be automatically installed when the user accesses a
recording file that is hosted on a WebEx server.
Cisco has updated affected versions of the Cisco WebEx Business Suite
meeting sites, Cisco WebEx Meetings sites, Cisco WebEx Meetings Server, and
Cisco WebEx ARF and WRF Players to 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-20171129-webex-players
Affected Products
* Vulnerable Products
The vulnerabilities disclosed in this advisory affect the Cisco WebEx ARF
Player and the Cisco WebEx WRF Player. The following client builds of Cisco
WebEx Business Suite (WBS30, WBS 31, and WBS32), Cisco WebEx Meetings, and
Cisco WebEx Meetings Server are affected by at least one of the
vulnerabilities described in this advisory:
+ Cisco WebEx Business Suite (WBS30) client builds prior to T30.20
+ Cisco WebEx Business Suite (WBS31) client builds prior to T31.20
+ Cisco WebEx Business Suite (WBS32) client builds prior to T32.7
+ Cisco WebEx Meetings with client builds prior to T32.7
+ Cisco WebEx Meeting Server builds prior to 2.7MR3
To determine whether a Cisco WebEx meeting site is running an affected
version of the WebEx client build, users can log in to their Cisco WebEx
meeting site and go to the Support > Downloads section. The version of the
WebEx client build will be displayed on the right side of the page under
About Meeting Center. See the "Fixed Software" section for details.
Alternatively, version information of the Cisco WebEx meeting client can be
accessed from within the Cisco WebEx meeting client. Version information
for the Cisco WebEx meeting client on Windows and Linux platforms can be
viewed by choosing Help > About Cisco WebEx Meeting Center. Version
information for the Cisco WebEx meeting client on Mac platforms can be
viewed by choosing Meeting Center > About Cisco WebEx Meeting Center.
The Cisco WebEx software updates are cumulative in client builds. For
example, if client build 30.32.16 is fixed, build 30.32.17 will contain
updated software. Cisco WebEx site administrators have access to secondary
version nomenclature, for example, T30 SP32 EP 16, which shows that the
server is running client build 30.32.16.
Note: Customers who do not receive automatic software updates may be
running versions of Cisco WebEx that have reached end of software
maintenance and should contact customer support.
Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by these
vulnerabilities.
Details
* The Cisco WebEx Business Suite (WBS) meeting services and Cisco WebEx
Meetings are a hosted multimedia conferencing solution that is managed and
maintained by Cisco WebEx. The Cisco WebEx Meetings Server is a multimedia
conferencing solution that customer can host in their private clouds.
The ARF and WRF file formats are used to store WebEx meeting recordings
that have been recorded on a WebEx meeting site, or on the computer of an
online meeting attendee.
The Cisco WebEx ARF Player and the Cisco WebEx WRF Player are applications
that are used to play back and edit WebEx ARF and WRF recording files
(files with .arf and .wrf extensions).
The Cisco WebEx ARF Player and Cisco WebEx WRF Player can be automatically
installed when a user accesses a recording file that is hosted on a WebEx
meeting site (for streaming playback mode). The Cisco WebEx ARF Player and
Cisco WebEx WRF Player can also be manually installed after downloading the
application from http://www.webex.com/play-webex-recording.html to play
back recording files for offline playback.
The Cisco WebEx ARF Player is available for all Cisco WebEx meeting site
clients (WBS30, WBS31, WBS32, and WebEx Meetings) and for Cisco WebEx
Meetings Server clients. The Cisco WebEx WRF Player is only available for
Cisco WebEx WBS30, WBS 31, and WBS32 meeting site clients and is not
available for the Cisco WebEx Meetings or Cisco WebEx Meetings Server
clients.
The following table provides the Cisco bug IDs and Common Vulnerabilities
and Exposures (CVE) identifiers that have been assigned for the
vulnerabilities in this advisory:
Title CVE ID Cisco Bug ID
Cisco WebEx Network
Recording Player CVE-2017-12367 CSCve11545, CSCve02843, CSCve11548
Denial of Service
Vulnerability
Cisco WebEx Network CSCve10584, CSCve10591, CSCve11503,
Recording Player CVE-2017-12368 CSCve10658, CSCve11507, CSCve10749,
Remote Code Execution CSCve10744, CSCve11532, CSCve10762,
Vulnerability CSCve10764, CSCve11538
Cisco WebEx Network
Recording Player CVE-2017-12369 CSCve30208, CSCve30214, CSCve30268
Out-of-Bounds
Vulnerability
Cisco WebEx Network
Recording Player CVE-2017-12370 CSCvf38060, CSCvg54836, CSCvf38077,
Remote Code Execution CSCvg54843, CSCvf38084, CSCvg54850
Vulnerability
Cisco WebEx Network CSCvf49650, CSCvg54853, CSCvg54856,
Recording Player CVE-2017-12371 CSCvf49697, CSCvg54861, CSCvf49707,
Remote Code Execution CSCvg54867
Vulnerability
Cisco WebEx Network
Recording Player CVE-2017-12372 CSCvf57234, CSCvg54868, CSCvg54870
Remote Code Execution
Vulnerability
Exploitation of these vulnerabilities may cause player applications to
crash or, in some cases, execute malicious code from a remote attacker.
To exploit these vulnerabilities, the player application would need to open
a malicious ARF or WRF file. An attacker may be able to accomplish this
exploit by providing the malicious recording file directly to users (for
example, by using email), or by directing a user to a malicious web page.
The vulnerabilities cannot be triggered by users who are attending a WebEx
meeting.
Workarounds
* There are no workarounds that address these vulnerabilities. However, it is
possible to remove all WebEx software completely from a system using 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 for Cisco Spark, WebEx, and
Jabber article at https://collaborationhelp.cisco.com/article/en-us/
WBX000026396.
Removal of the WebEx software from a Linux or UNIX-based system can be
accomplished by following the steps in the Cisco Collaboration Help for
Cisco Spark, WebEx, and Jabber article: https://collaborationhelp.cisco.com
/article/en-us/WBX28548.
Fixed Software
* Cisco has released free software updates that address the vulnerability
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:
http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.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 upgrade 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:
http://www.cisco.com/en/US/support/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 client builds of Cisco WebEx Business Suite (WBS30, WBS31,
WBS32), Cisco WebEx Meetings, and Cisco WebEx Meetings Server address all
the vulnerabilities described in this advisory:
+ Cisco WebEx Business Suite (WBS30) client builds T30.20 and later
+ Cisco WebEx Business Suite (WBS31) client builds T31.20 and later
+ Cisco WebEx Business Suite (WBS32) client builds T32.7 and later
+ Cisco WebEx Meetings with client builds T32.7 and later
+ Cisco WebEx Meeting Server builds 2.7MR3 and later, 2.8MR1 and later,
3.0 and later
To determine whether a Cisco WebEx meeting site is running an affected
version of the WebEx client build, users can log in to their Cisco WebEx
meeting site and go to the Support > Downloads section. The version of the
WebEx client build will be displayed on the right side of the page under
About Meeting Center. The Cisco WebEx software updates are cumulative in
client builds. For example, if client build 30.32.16 is fixed, build
30.32.17 will contain updated software.
The vulnerabilities disclosed in this advisory affect the Cisco WebEx ARF
and WRF Players. The Microsoft Windows, Apple Mac OS X, and Linux versions
of the players are all affected by at least one vulnerability described in
this advisory. If the Cisco WebEx ARF Player or the Cisco WebEx WRF Player
was automatically installed, it will be automatically upgraded to the
latest, non-vulnerable version when users access a recording file that is
hosted on a WebEx meeting site. If the Cisco WebEx ARF Player or the Cisco
WebEx WRF Player was manually installed, users will need to manually
install a new version of the player after downloading the latest version
from http://www.webex.com/play-webex-recording.html.
Users can manually verify the installed version of the Cisco WebEx ARF
Player or the Cisco WebEx WRF Player to determine whether they are affected
by these vulnerabilities.
NOTE: Users whose WebEx Business Suites are on lockdown will need to
contact WebEx Support to apply the appropriate patch to their WebEx site.
Cisco Bug ID First Fixed Release
WBS30 WBS31 WBS32 WebEx Meetings WebEx Meetings Server
CSCve11545 2.7MR3
2.8MR1
CSCve02843 T30.20 T31.14 T32.2
CSCve11548 T30.20
T32.2
CSCve10584 T31.14.4 T32.3
T31.15
CSCve10591 2.7MR3
2.8MR1
CSCve11503 T32.3
CSCve10658 T31.14.4 T32.4
CSCve11507 T32.3
CSCve10749 2.7MR3
2.8MR1
CSCve10744 T31.14.4 T32.2
CSCve11532 T32.2
CSCve10762 T32.4
CSCve10764 3.0
CSCve11538 T32.2
T31.14.4 T32.3
CSCve30208 T31.15 T32.6
T31.17.2
CSCve30214 2.7MR3
2.8MR1
CSCve30268 T32.4
T32.6
CSCvf38060 T31.17 T32.5
CSCvg54836 T32.7
CSCvf38077 T31.17 T32.5
CSCvg54843 T32.7
CSCvf38084 T31.17 T32.5
CSCvg54850 T32.7
CSCvf49650 T31.20 T32.6
CSCvg54853 3.0
CSCvg54856 T32.7
CSCvf49697 T31.20 T32.6
CSCvg54861 T32.7
CSCvf49707 T31.20 T32.7
CSCvg54867 T32.7
CSCvf57234 T31.17.2 T32.6
CSCvg54868 3.0
CSCvg54870 T32.7
Exploitation and Public Announcements
* The Cisco Product Security Incident Response Team (PSIRT) is not aware of
any public announcements or malicious use of the vulnerability that is
described in this advisory.
Source
* These vulnerabilities were reported to Cisco by Yihan Lian, Fortinet, and
Trend Micro as follows:
Cisco Bug IDs Reporter
CSCve11545, CSCve02843, CSCve11548, Yihan Lian of Qihoo 360
CSCve30208, CSCve30214, CSCve30268 GearTeam
CSCve10584, CSCve10591, CSCve11503,
CSCve10658, CSCve11507, CSCve10749, Kushal Arvind Shah of
CSCve10744, CSCve11532, CSCve10762, Fortinet's Fortiguard Team
CSCve10764, CSCve11538
CSCvf38077, CSCvg54843, CSCvf38060, Steven Seeley of Offensive
CSCvg54836, CSCvf38084, CSCvg54850, Security working with Trend
CSCvf49650, CSCvg54853, CSCvg54856, Micro's Zero Day Initiative
CSCvf49697, CSCvg54861, CSCvf49707, CSCvg54867
CSCvf57234, CSCvg54868, CSCvg54870 rgod working with Trend
Micro's Zero Day Initiative
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-20171129-webex-players
Revision History
*
+-----------------------------------------------------------------------------+
| Version | Description | Section | Status | Date |
|---------+----------------------------+----------+--------+------------------|
| 1.4 | Provided clarity to | Affected | Final | 2017-December-12 |
| | vulnerable releases. | Products | | |
|---------+----------------------------+----------+--------+------------------|
| 1.3 | Provided clarity to first | Fixed | Final | 2017-November-30 |
| | fixed versions. | Software | | |
|---------+----------------------------+----------+--------+------------------|
| | Updated researcher's | | | |
| 1.2 | information in the Source | Source | Final | 2017-November-30 |
| | section. | | | |
|---------+----------------------------+----------+--------+------------------|
| | Corrected a bug ID listed | | | |
| 1.1 | in the Details section for | Details | Final | 2017-November-29 |
| | CVE-2017-12370. | | | |
|---------+----------------------------+----------+--------+------------------|
| 1.0 | Initial public release. | ? | Final | 2017-November-29 |
+-----------------------------------------------------------------------------+
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- -------------------------------------------------------------------------------
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- --------------------------END INCLUDED TEXT--------------------
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