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AUSCERT External Security Bulletin Redistribution
ESB-2021.1909
Cisco Webex Network Recording Player and Webex Player Memory
Corruption Vulnerability
3 June 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Webex Network Recording Player
Cisco Webex Player
Publisher: Cisco Systems
Operating System: Windows
Mac OS
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-1503 CVE-2021-1502
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-player-rCFDeVj2
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-player-dOJ2jOJ
Comment: This bulletin contains two (2) Cisco Systems security advisories.
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Webex Network Recording Player and Webex Player Memory Corruption
Vulnerability
Priority: High
Advisory ID: cisco-sa-webex-player-rCFDeVj2
First Published: 2021 June 2 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvx30405 CSCvx30412
CVE Names: CVE-2021-1503
CWEs: CWE-119
Summary
o A vulnerability in Cisco Webex Network Recording Player for Windows and
MacOS and Cisco Webex Player for Windows and MacOS could allow an attacker
to execute arbitrary code on an affected system.
This vulnerability is due to insufficient validation of values in Webex
recording files that are in either Advanced Recording Format (ARF) or Webex
Recording Format (WRF). An attacker could exploit this vulnerability 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 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-webex-player-rCFDeVj2
Affected Products
o Vulnerable Products
This vulnerability affects Cisco Webex Network Recording Player for Windows
and MacOS and Cisco Webex Player for Windows and MacOS releases earlier
than Release 41.2. The players are available from Cisco Webex Meetings
sites and Cisco Webex Meetings Server.
To determine which release of Cisco Webex Network Recording Player or Cisco
Webex Player is installed on a system, 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 this vulnerability.
Details
o Cisco Webex Meetings is a hosted, multimedia conferencing solution that is
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 Meetings 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 used to play back ARF files. It is
available from Cisco Webex Meetings sites and Cisco Webex Meetings Server.
The player can be installed manually from a user's Cisco Webex website
download page in Classic view or from the Cisco Webex Video Recording page.
Cisco Webex Player is used to play back WRF files. It is available from
Cisco Webex Meetings sites. It is not available from Cisco Webex Meetings
Server. The player can be installed manually from a user's Cisco Webex
website download page in Classic view or from the Cisco Webex Video
Recording page.
Workarounds
o There are no workarounds that address this vulnerability.
Fixed Software
o 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:
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 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
Cisco fixed this vulnerability in Cisco Webex Network Recording Player and
Cisco Webex Player releases 41.2 and later. Releases are available from the
Cisco Webex Video Recording page or from corresponding Cisco Webex Meetings
sites and servers.
Customers who host Cisco Webex Meetings Server on premises can obtain
updated releases of Cisco Webex Network Recording Player from server
releases 3.0 MR4 and later and 4.0 MR4 and later.
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 Cisco would like to thank Kushal Arvind Shah of Fortinet for reporting this
vulnerability.
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-webex-player-rCFDeVj2
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2021-JUN-02 |
+----------+---------------------------+----------+--------+--------------+
- --------------------------------------------------------------------------------
Cisco Webex Network Recording Player and Webex Player Memory Corruption
Vulnerability
Priority: High
Advisory ID: cisco-sa-webex-player-dOJ2jOJ
First Published: 2021 June 2 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvx30404
CVE Names: CVE-2021-1502
CWEs: CWE-119
Summary
o A vulnerability in Cisco Webex Network Recording Player for Windows and
MacOS and Cisco Webex Player for Windows and MacOS could allow an attacker
to execute arbitrary code on an affected system.
The vulnerability is due to insufficient validation of values within Webex
recording files formatted as either Advanced Recording Format (ARF) or
Webex Recording Format (WRF). An attacker could exploit the vulnerability
by sending a user a malicious ARF or WRF file through a link or email
attachment and persuading the user to open the file. 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 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-webex-player-dOJ2jOJ
Affected Products
o Vulnerable Products
This vulnerability affects Cisco Webex Network Recording Player for Windows
and MacOS and Cisco Webex Player for Windows and MacOS releases earlier
than Release 41.4. The players are available from Cisco Webex Meetings
sites.
To determine which release of Cisco Webex Network Recording Player or Cisco
Webex Player is installed on a system, 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 this vulnerability.
Details
o Cisco Webex Meetings is a hosted, multimedia conferencing solution that is
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 Meetings 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 Meetings sites and
Cisco Webex Meetings Server. The player can be installed manually from a
user's Cisco Webex website download page in Classic view, or from the Cisco
Webex Video Recording page.
Cisco Webex Player is the application that is used to play back WRF files.
It is available from Cisco Webex Meetings sites. It is not available from
Cisco Webex Meetings Server. The player can be installed manually from a
user's Cisco Webex website download page in Classic view, or from the Cisco
Webex Video Recording page.
Workarounds
o There are no workarounds that address this vulnerability.
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 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
Cisco fixed this vulnerability in Cisco Webex Network Recording Player and
Cisco Webex Player releases 41.4 and later. Releases are available from the
Cisco Webex Video Recording page or from corresponding Cisco Webex Meetings
sites.
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 Cisco would like to thank Kushal Arvind Shah of Fortinet for reporting this
vulnerability.
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-webex-player-dOJ2jOJ
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2021-JUN-02 |
+----------+---------------------------+----------+--------+--------------+
- --------------------------END INCLUDED TEXT--------------------
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