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AUSCERT External Security Bulletin Redistribution
ESB-2021.0602
Cisco Webex Meetings Desktop App and Webex Productivity Tools for Windows
Shared Memory Information Disclosure Vulnerability
18 February 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Webex Meetings Desktop App
Cisco Webex Productivity Tools
Publisher: Cisco Systems
Operating System: Windows
Impact/Access: Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-1372
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wda-pt-msh-6LWOcZ5
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Cisco Webex Meetings Desktop App and Webex Productivity Tools for Windows
Shared Memory Information Disclosure Vulnerability
Priority: Medium
Advisory ID: cisco-sa-wda-pt-msh-6LWOcZ5
First Published: 2021 February 17 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvv02342 CSCvv21029
CVE Names: CVE-2021-1372
CWEs: CWE-202
Summary
o A vulnerability in Cisco Webex Meetings Desktop App and Webex Productivity
Tools for Windows could allow an authenticated, local attacker to gain
access to sensitive information on an affected system.
This vulnerability is due to the unsafe usage of shared memory by the
affected software. An attacker with permissions to view system memory could
exploit this vulnerability by running an application on the local system
that is designed to read shared memory. A successful exploit could allow
the attacker to retrieve sensitive information from the shared memory,
including usernames, meeting information, or authentication tokens.
Note: To exploit this vulnerability, an attacker must have valid
credentials on a Microsoft Windows end-user system and must log in after
another user has already authenticated with Webex on the same end-user
system.
Cisco has released 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-wda-pt-msh-6LWOcZ5
Affected Products
o Vulnerable Products
This vulnerability affects Cisco Webex Meetings Desktop App and Cisco Webex
Productivity Tools releases earlier than releases 40.6 and 40.10 when they
are running on a Microsoft Windows end-user system.
This vulnerability affects Cisco Webex Meetings Server Desktop App and
Cisco Webex Productivity Tools releases that are included with Cisco Webex
Meeting Server releases earlier than Release 4.0MR3 SP4 when they are
running on a Microsoft Windows end-user system.
For information about which Cisco software releases are vulnerable, see the
Fixed Software section of this advisory.
To determine whether a vulnerable release of Cisco Webex Meetings Desktop
App is installed on a Windows machine, launch the Cisco Webex Meetings
application, click the gear icon in the top right of the application
window, and choose the About... menu entry. A popup window displaying the
currently installed release will open. This is also documented in the
article Check the Cisco Webex Meetings Desktop App Version .
To determine whether a vulnerable release of Cisco Webex Productivity Tools
is installed on a Windows machine, right-click the Webex Productivity Tools
icon on the Windows taskbar and select About from the menu. A popup window
displaying the currently installed release will open. This is also
documented in the article Check the Cisco Webex Productivity Tools Version
for Windows .
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 this vulnerability does not affect the Apple Mac
OS X or Linux versions of these products.
Details
o Cisco Webex Meetings Desktop App allows easy access to commonly used Webex
Meetings controls. With the Cisco Webex Meetings desktop app, you can start
and join meetings without going to your Webex site.
Cisco Webex Productivity Tools is an optional companion application that
allows users to quickly schedule and join meetings from their desktop
without the need to access the Meetings website. The application should not
be confused with the Cisco Webex Meetings Client, which is the main client
application that provides the core functionality to host or attend a Webex
meeting.
Administrators can update the Cisco Webex Meetings Desktop App or Webex
Productivity Tools for their user base by following the instructions
available in the document IT Administrator Guide for Mass Deployment of the
Cisco Webex Meetings Desktop App and Productivity Tools .
Users can update the Cisco Webex Meetings Desktop App by launching the
Cisco Webex Meetings application and clicking the gear icon in the top
right of the application window and then choosing the Check for Updates
entry from the drop-down list. This is also documented in the article
Update the Cisco Webex Meetings Desktop App .
Users can update the Cisco Webex Productivity Tools in Microsoft Outlook by
selecting Schedule Meeting > More > Check for Updates . This is also
documented in more detail in the article Check for Cisco Webex Productivity
Tools Updates for Windows .
Workarounds
o There are no workarounds that address this vulnerability.
Fixed Software
o When considering software upgrades , customers are advised to regularly
consult the advisories for Cisco products, which are available from the
Cisco Security Advisories 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.
Fixed Releases
Customers are advised to upgrade to an appropriate fixed Cisco Webex
Meetings Desktop App or Webex Productivity Tools software release as
indicated in the following table:
Cisco Webex Platform First Fixed Release
Webex Meetings Latest Channel sites 40.10
Webex Meetings Slow Channel sites 40.6
Webex Meetings Server 4.0MR3 SP4
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 vulnerability that is
described in this advisory.
Source
o This vulnerability was found during internal security testing.
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-wda-pt-msh-6LWOcZ5
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2021-FEB-17 |
+----------+---------------------------+----------+--------+--------------+
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