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AUSCERT External Security Bulletin Redistribution
Cisco Webex Meetings Suite and Cisco Webex Meetings Online
Unauthenticated Meeting Join Vulnerability
28 January 2020
AusCERT Security Bulletin Summary
Product: Cisco Webex Meetings
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Access Confidential Data -- Remote/Unauthenticated
CVE Names: CVE-2020-3142
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Cisco Webex Meetings Suite and Cisco Webex Meetings Online Unauthenticated
Meeting Join Vulnerability
Advisory ID: cisco-sa-20200124-webex-unauthjoin
First Published: 2020 January 24 16:00 GMT
Last Updated: 2020 January 24 19:21 GMT
Version 1.1: Final
Workarounds: No workarounds availableCisco Bug IDs: CSCvs69110
A vulnerability in Cisco Webex Meetings Suite sites and Cisco Webex
Meetings Online sites could allow an unauthenticated, remote attendee to
join a password-protected meeting without providing the meeting password.
The connection attempt must initiate from a Webex mobile application for
either iOS or Android.
The vulnerability is due to unintended meeting information exposure in a
specific meeting join flow for mobile applications. An unauthorized
attendee could exploit this vulnerability by accessing a known meeting ID
or meeting URL from the mobile device's web browser. The browser will then
request to launch the device's Webex mobile application. A successful
exploit could allow the unauthorized attendee to join the
password-protected meeting. The unauthorized attendee will be visible in
the attendee list of the meeting as a mobile attendee.
Cisco has applied updates that address this vulnerability and no user
action is required. There are no workarounds that address this
This advisory is available at the following link:
o Vulnerable Products
This vulnerability affects Cisco Webex Meetings Suite sites and Cisco Webex
Meetings Online sites releases earlier than 39.11.5 and 40.1.3.
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
Cisco has confirmed that Cisco Webex Meetings Server is not affected.
o Determine the Cisco Webex Meetings Suite or Cisco Webex Meetings Online
To determine the current release on a Cisco Webex Meetings Suite site or
Cisco Webex Meetings Online site, a user can perform the following steps:
Log in to the Cisco Webex Meetings Suite site or Cisco Webex Meetings
Navigate to Downloads on the left side of the page.
Next to Version Information hover over the circled i .
Check the value displayed next to Page version.
There are no workarounds that address this vulnerability.
o Cisco has addressed this vulnerability in Cisco Webex Meetings Suite sites
and Cisco Webex Meetings sites, which are cloud based. No user action is
required. The Details section of this advisory describes how to determine
the current running release.
Customers who need additional information are advised to contact the Cisco
Technical Assistance Center (TAC) or their contracted maintenance provider.
Cisco fixed this vulnerability in page versions 39.11.5 and later and
40.1.3 and later for Cisco Webex Meetings Suite sites and Cisco Webex
Meetings Online sites. These page versions apply to client versions T32,
T33, T39, and T40. The fix applies to Cisco Webex Meetings Suite sites and
Cisco Webex Meetings sites only. Customers are not required to update the
Cisco Webex Meetings mobile application or the Cisco Webex Meetings desktop
Exploitation and Public Announcements
The Cisco Product Security Incident Response Team (PSIRT) is not aware of
any public announcements of the vulnerability that is described in this
Cisco PSIRT is aware of active use of the vulnerability that is described
in this advisory.
This vulnerability was found during the resolution of a Cisco TAC support
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.
| Version | Description | Section | Status | Date |
| | Corrected link | | | |
| 1.1 | destination for visible | Summary | Final | 2020-January-24 |
| | advisory URL in the | | | |
| | Summary section. | | | |
| 1.0 | Initial public release. | - | Final | 2020-January-24 |
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