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AUSCERT External Security Bulletin Redistribution
ESB-2019.4179
Multiple vulnerabilities have been identified in Cisco Webex
7 November 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Webex
Publisher: Cisco Systems
Operating System: Windows
Cisco
Virtualisation
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Increased Privileges -- Existing Account
Modify Arbitrary Files -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-15960 CVE-2019-15287 CVE-2019-15286
CVE-2019-15285 CVE-2019-15284 CVE-2019-15283
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191106-wbs-privilege
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191106-webex-player
Comment: This bulletin contains two (2) Cisco Systems security advisories.
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Cisco Webex Network Recording Admin Page Privilege Escalation Vulnerability
Priority: Medium
Advisory ID: cisco-sa-20191106-wbs-privilege
First Published: 2019 November 6 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds availableCisco Bug IDs: CSCvq37564
CVE-2019-15960
CWE-264
CVSS Score:
5.4 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:X/RL:X/RC:X
Summary
o A vulnerability in the Webex Network Recording Admin page of Cisco Webex
Meetings could allow an authenticated, remote attacker to elevate
privileges in the context of the affected page. To exploit this
vulnerability, the attacker must be logged in as a low-level administrator.
The vulnerability is due to insufficient access control validation. An
attacker could exploit this vulnerability by submitting a crafted URL
request to gain privileged access in the context of the affected page. A
successful exploit could allow the attacker to elevate privileges in the
Webex Recording Admin page, which could allow them to view or delete
recordings that they would not normally be able to access.
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-20191106-wbs-privilege
Affected Products
o Vulnerable Products
At the time of publication, this vulnerability affected Cisco Webex
Meetings releases earlier than 39.7.0.
See the Details section in the bug ID(s) at the top of this advisory for
the most complete and current information.
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
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 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.
Fixed Releases
At the time of publication, Cisco Webex Meetings releases 39.7.0 and later
contained the fix for this vulnerability.
See the Details section in the bug ID(s) at the top of this advisory for
the most complete and current information.
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 Thomas Bourguenolle of Ernst & Young 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-20191106-wbs-privilege
Revision History
o +---------+-------------------------+---------+--------+------------------+
| Version | Description | Section | Status | Date |
+---------+-------------------------+---------+--------+------------------+
| 1.0 | Initial public release. | - | Final | 2019-November-06 |
+---------+-------------------------+---------+--------+------------------+
- ---
Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code
Execution Vulnerabilities
Priority: High
Advisory ID: cisco-sa-20191106-webex-player
First Published: 2019 November 6 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds availableCisco Bug IDs: CSCvq32301 CSCvq36083 CSCvq36098 CSCvq84379CSCvq84396 CSCvq84421 CSCvq84438 CSCvq86070CSCvq86075 CSCvq86152 CSCvq86160 CSCvq86181CSCvq86224 CSCvq86249 CSCvq86254
CVE-2019-15283
CVE-2019-15284
CVE-2019-15285
CVE-2019-15286
CVE-2019-15287
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 due to insufficient validation of certain
elements with a Webex recording stored in either the Advanced Recording
Format (ARF) or the Webex Recording Format (WRF). 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-20191106-webex-player
Affected Products
o Vulnerable Products
These vulnerabilities affect the following releases of Cisco Webex Network
Recording Player for Microsoft Windows and Cisco Webex Player for Microsoft
Windows, which are available from Cisco Webex Meetings sites, Cisco Webex
Meetings Online sites, and Cisco Webex Meetings Server:
Cisco Webex Meetings sites - All Webex Network Recording Player and
Webex Player releases earlier than Release WBS 39.5.12
Cisco Webex Meetings Online - All Webex Network Recording Player and
Webex Player releases earlier than Release 1.3.44
Cisco Webex Meetings Server - All Webex Network Recording Player
releases earlier than Release 4.0MR2
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 Meetings 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 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, 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 Meetings site.
Cisco Webex Player is the application that is used to play back WRF files.
It is available from Cisco Webex Meetings 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 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 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
First Fixed Release for These Vulnerabilities
Cisco Cisco Cisco
Webex Webex Webex Cisco Cisco Cisco
Meetings Meetings Meetings Webex Webex Webex
Latest 39.8.x 39.5.x Meetings Meetings Meetings
CVE ID Sites Sites Sites Online Server Server
CVE-2019-15283 39.6.0 39.8.0 39.5.12 1.3.44 4.0MR2 3.0MR3
CVE-2019-15284 39.6.0 39.8.0 39.5.12 1.3.44 4.0MR2 3.0MR3
CVE-2019-15285 39.6.0 39.8.0 39.5.12 1.3.44 4.0MR2 3.0MR3
CVE-2019-15286 39.6.0 39.8.0 39.5.12 1.3.44 4.0MR2 3.0MR3
CVE-2019-15287 39.6.0 Not 39.5.11.3 1.3.44 4.0MR1 3.0MR3
affected
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 and Yici Zhang 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-20191106-webex-player
Revision History
o +---------+-------------------------+---------+--------+------------------+
| Version | Description | Section | Status | Date |
+---------+-------------------------+---------+--------+------------------+
| 1.0 | Initial public release. | - | Final | 2019-November-06 |
+---------+-------------------------+---------+--------+------------------+
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