Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2018.2082
Multiple vulnerabilities have been identified in Cisco Webex
19 July 2018
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Webex
Publisher: Cisco Systems
Operating System: Cisco
Windows
VMware ESX Server
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Cross-site Scripting -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2018-0390 CVE-2018-0387 CVE-2018-0380
CVE-2018-0379
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180718-webex-DOM-xss
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180718-webex-dos
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180718-webex-rce
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180718-webex-teams-rce
Comment: This bulletin contains four (4) Cisco Systems security advisories.
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Webex DOM-Based Cross-Site Scripting Vulnerability
Medium
Advisory ID:
cisco-sa-20180718-webex-DOM-xss
First Published:
2018 July 18 16:00 GMT
Version 1.0:
Final
Workarounds:
No workarounds available
Cisco Bug IDs:
CSCvj33287
CVE-2018-0390
CWE-79
CVSS Score:
Base 6.1
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:X/RL:X/RC:X
CVE-2018-0390
CWE-79
Summary
A vulnerability in the web framework of Cisco Webex could allow an
unauthenticated, remote attacker to conduct a Document Object Model-based
(DOM-based) cross-site scripting (XSS) attack against the user of the web
interface of an affected system.
The vulnerability is due to insufficient input validation of certain
parameters that are passed to the affected software by using the HTTP POST
method. An attacker who can submit malicious scripts to the affected user
interface element could execute arbitrary script or HTML code in the user's
browser in the context of the affected site.
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-20180718-webex-DOM-xss
Affected Products
o Vulnerable Products
This vulnerability affects Cisco Webex. For information about affected
software releases, consult the Cisco bug ID(s) at the top of this advisory.
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 For information about fixed software releases, consult the Cisco bug ID(s)
at the top of this advisory.
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.
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 Gabriele Pippi 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.
Subscribe to Cisco Security Notifications
o Subscribe
Action Links for This Advisory
o Understanding Cross-Site Scripting (XSS) Threat Vectors
Related to This Advisory
o Cross-Site Scripting
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20180718-webex-DOM-xss
Revision History
+----------+----------------------------+----------+---------+----------------+
| Version | Description | Section | Status | Date |
+----------+----------------------------+----------+---------+----------------+
| 1.0 | Initial public release. | -- | Final | 2018-July-18 |
+----------+----------------------------+----------+---------+----------------+
Legal Disclaimer
o THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND
OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT
OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES
THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits the
distribution URL is an uncontrolled copy and may lack important information
or contain factual errors. The information in this document is intended for
end users of Cisco products.
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.
- ---
Cisco Webex Network Recording Players Denial of Service Vulnerabilities
Medium
Advisory ID:
cisco-sa-20180718-webex-dos
First Published:
2018 July 18 16:00 GMT
Version 1.0:
Final
Workarounds:
No workarounds available
Cisco Bug IDs:
CSCvh70253
CSCvh70268
CSCvh72272
CSCvh70253,CSCvh70268,CSCvh72272,CSCvh72281,CSCvh72285,CSCvi60477,CSCvi60485,
CSCvi60490,CSCvi60520,CSCvi60529,CSCvi60533
CVE-2018-0380
CWE-399
CVSS Score:
Base 5.5
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:X/RL:X/RC:X
CVE-2018-0380
CWE-399
Summary
Multiple vulnerabilities exist in the Cisco Webex Network Recording Player
for Advanced Recording Format (ARF) and Webex Recording Format (WRF) files.
An 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 in the Webex recording players. Exploitation of these
vulnerabilities could cause an affected player to crash, resulting in a
denial of service (DoS) condition.
The Cisco Webex players are applications that are used to play back Webex
meetings that have been recorded by an online meeting attendee. The Webex
Network Recording Player for .arf files can be automatically installed when
the user accesses a recording that is hosted on a Webex server. The Webex
Player for .wrf files can be downloaded manually.
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-20180718-webex-dos
Affected Products
o Vulnerable Products
These vulnerabilities affect ARF and WRF recording players available from
Cisco Webex Meetings Suite sites, Cisco Webex Meetings Online sites, and
Cisco Webex Meetings Server. For information about affected software
releases, consult the Cisco bug ID(s) at the top of this advisory.
To determine which version of the Cisco Webex Network Recording Player (for
.arf files) or the Cisco Webex Player (for .wrf files) is installed, users
can open the player and select the Help > About menu.
Note: Customers who do not receive automatic software updates may be
running versions of Cisco Webex Meetings that have reached end of software
maintenance and should contact customer support.
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 The Cisco Webex Meetings Suite 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 can host in their private clouds.
Cisco Webex Meetings services can be configured to allow recording of a
meeting that is stored online and can be downloaded by a user in ARF
format. These services can also record meetings directly on local computers
in WRF format. The Cisco Webex Network Recording Player plays .arf files
and the Cisco Webex Player plays .wrf files.
The Network Recording Player can be automatically installed when a user
accesses a recording file that is hosted on a Cisco Webex Meetings Suite
site (for streaming playback mode). The Cisco Webex Network Recording
Player can also be installed manually. The Cisco Webex Player can only be
manually installed from the Webex site.
The Cisco Webex Network Recording Player for .arf files is available for
Cisco Webex Meetings Suite (WBS31, WBS32, WBS33), Cisco Webex Meetings
Online, and for Cisco Webex Meetings Server. The Cisco Webex Player for
.wrf files is only available for Cisco Webex Meetings Suite (WBS31, WBS32,
and WBS33) and Cisco Webex Meetings Online. The Cisco Webex Player for .wrf
files is not available for Cisco Webex Meetings Server.
The vulnerabilities disclosed in this advisory affect the Cisco Webex
Network Recording Player and the Cisco Webex Player. Windows, OS X, and
Linux versions of the players are all affected by at least one
vulnerability described in this advisory.
Workarounds
o There are no workarounds that address these vulnerabilities. However, it is
possible to remove the affected Cisco Webex Network Recording Player and
Cisco Webex Player by following the uninstall procedure for the operating
system. For example, in Windows, use Add or Remove Programs to uninstall
the affected players.
To remove Webex software completely from a system, use 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 article Cisco WebEx and 3rd Party Support
Utilities.
Removal of the Webex software from a Linux or UNIX-based system can be
accomplished by following the steps in the Cisco Collaboration Help article
How Do I Uninstall WebEx Software on a Linux or Unix Based System?.
Fixed Software
o For information about fixed software releases, consult the Cisco bug ID(s)
at the top of this advisory.
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.
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 These vulnerabilities were reported to Cisco by Fortinet as follows:
Cisco Bug IDs Reporter
CSCvh70253, CSCvh70268 Kushal Arvind Shah of
Fortinet's FortiGuard Labs
CSCvh72272, CSCvh72281, CSCvh72285 Chris Navarrete of Fortinet's
FortiGuard Labs
CSCvi60477, CSCvi60485, CSCvi60490, Yonghui Han of Fortinet's
CSCvi60520, CSCvi60529, CSCvi60533 FortiGuard Labs
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.
Subscribe to Cisco Security Notifications
o Subscribe
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20180718-webex-dos
Revision History
+----------+----------------------------+----------+---------+----------------+
| Version | Description | Section | Status | Date |
+----------+----------------------------+----------+---------+----------------+
| 1.0 | Initial public release. | -- | Final | 2018-July-18 |
+----------+----------------------------+----------+---------+----------------+
Legal Disclaimer
o THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND
OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT
OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES
THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits the
distribution URL is an uncontrolled copy and may lack important information
or contain factual errors. The information in this document is intended for
end users of Cisco products.
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.
- ---
Cisco Webex Network Recording Players Remote Code Execution Vulnerabilities
High
Advisory ID:
cisco-sa-20180718-webex-rce
First Published:
2018 July 18 16:00 GMT
Version 1.0:
Final
Workarounds:
No workarounds available
Cisco Bug IDs:
CSCvi02621
CSCvi02965
CSCvi63329
CSCvi02621,CSCvi02965,CSCvi63329,CSCvi63333,CSCvi63335,CSCvi63374,CSCvi63376,
CSCvi63377,CSCvi63391,CSCvi63392,CSCvi63396,CSCvi63495,CSCvi63497,CSCvi63498,
CSCvi82684,CSCvi82700,CSCvi82705,CSCvi82725,CSCvi82737,CSCvi82742,CSCvi82760,
CSCvi82771,CSCvj51284,CSCvj51294
CVE-2018-0379
CWE-119
CVSS Score:
Base 7.8
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X
CVE-2018-0379
CWE-119
Summary
Multiple vulnerabilities exist in the Cisco Webex Network Recording Player
for Advanced Recording Format (ARF) and Webex Recording Format (WRF) files.
An 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 in the Webex recording players. Exploitation of these
vulnerabilities could allow arbitrary code execution on the system of a
targeted user. There is no risk when a .arf player that is stored on a
Webex site is played in the Webex Network Recording Player.
The Cisco Webex players are applications that are used to play back Webex
meetings that have been recorded by an online meeting attendee. The Webex
Network Recording Player for .arf files can be automatically installed when
the user accesses a recording that is hosted on a Webex server. The Webex
Player for .wrf files can be downloaded manually.
Cisco has updated affected versions of the ARF and WRF recording players on
Cisco Webex Meetings Suite sites, Cisco Webex Meetings Online sites, and
Cisco Webex Meetings Server. 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-20180718-webex-rce
Affected Products
o Vulnerable Products
These vulnerabilities affect ARF and WRF recording players available from
Cisco Webex Meetings Suite sites, Cisco Webex Meetings Online sites, and
Cisco Webex Meetings Server. The following versions of ARF and WRF
recording players are affected:
- Cisco Webex Meetings Suite (WBS31) - Webex Network Recording Player and
Webex Player versions prior to WBS31.23
- Cisco Webex Meetings Suite (WBS32) - Webex Network Recording Player and
Webex Player versions prior to WBS32.15
- Cisco Webex Meetings Suite (WBS33) - Webex Network Recording Player and
Webex Player versions prior to WBS33.2
- Cisco Webex Meetings Online - Webex Network Recording Player and WebEx
Player versions prior to 1.3.35
- Cisco Webex Meetings Server - Webex Network Recording Player versions
prior to 3.0MR1
To determine which version of the Cisco Webex Network Recording Player (for
.arf files) or the Cisco Webex Player (for .wrf files) is installed, users
can open the player and select the Help > About menu.
Note: Customers who do not receive automatic software updates may be
running versions of Cisco Webex Meetings that have reached end of software
maintenance and should contact customer support.
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 The Cisco Webex Meetings Suite 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 can host in their private clouds.
Cisco Webex Meetings services can be configured to allow recording of a
meeting that is stored online and can be downloaded by a user in ARF
format. These services can also record meetings directly on local computers
in WRF format. The Cisco Webex Network Recording Player plays .arf files
and the Cisco Webex Player plays .wrf files.
The Network Recording Player can be automatically installed when a user
accesses a recording file that is hosted on a Cisco Webex Meetings Suite
site (for streaming playback mode). The Cisco Webex Network Recording
Player can also be installed manually. The Cisco Webex Player can only be
manually installed from the Webex site.
The Cisco Webex Network Recording Player for .arf files is available for
Cisco Webex Meetings Suite (WBS31, WBS32, WBS33), Cisco Webex Meetings
Online, and for Cisco Webex Meetings Server. The Cisco Webex Player for
.wrf files is only available for Cisco Webex Meetings Suite (WBS31, WBS32,
and WBS33) and Cisco Webex Meetings Online. The Cisco Webex Player for .wrf
files is not available for Cisco Webex Meetings Server.
The vulnerabilities disclosed in this advisory affect the Cisco Webex
Network Recording Player and the Cisco Webex Player. Windows, OS X, and
Linux versions of the players are all affected by at least one
vulnerability described in this advisory.
Workarounds
o There are no workarounds that address these vulnerabilities. However, it is
possible to remove the affected Cisco Webex Network Recording Player and
Cisco Webex Player by following the uninstall procedure for the operating
system. For example, in Windows, use Add or Remove Programs to uninstall
the affected players.
To remove Webex software completely from a system, use 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 article Cisco WebEx and 3rd Party Support
Utilities.
Removal of the Webex software from a Linux or UNIX-based system can be
accomplished by following the steps in the Cisco Collaboration Help article
How Do I Uninstall WebEx Software on a Linux or Unix Based System?.
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 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
The following versions of the Cisco Webex Network Recording Player and the
Cisco Webex Player available from the Cisco Webex Meetings Suite sites
(WBS31, WBS32, WBS33), Cisco Webex Meetings Online site, and Cisco Webex
Meetings Server address all the vulnerabilities described in this advisory:
- Cisco Webex Meetings Suite (WBS31) - Cisco Webex Network Recording
Player and Cisco Webex Player versions WBS31.23 and later
- Cisco Webex Meetings Suite (WBS32) - Cisco Webex Network Recording
Player and Cisco Webex Player versions WBS32.15 and later
- Cisco Webex Meetings Suite (WBS33) - Cisco Webex Network Recording
Player and Cisco Webex Player versions WBS33.2 and later
- Cisco Webex Meetings Online - Webex Network Recording Player and WebEx
Player versions 1.3.35 and later
- Cisco Webex Meetings Server - Webex Network Recording Player versions
3.0MR1 and later
Alternatively, the latest versions of the ARF and WRF players are available
from http://www.webex.com/play-webex-recording.html.
To determine whether a Cisco Webex meeting site has an updated version of
the Cisco Webex Players, users can sign into their Cisco Webex Meetings
site and go to the Support > Downloads section. The version is displayed on
the right side of the page under About Webex Meetings.
The Cisco Webex Network Recording Player (for .arf files) will be
automatically upgraded to the latest, nonvulnerable version when users
access a recording file that is hosted on a Cisco Webex Meetings site that
contains the versions previously specified. Users will need to manually
uninstall the Cisco Webex Player and get the updated version of the Cisco
Webex Player from http://www.webex.com/play-webex-recording.html or from a
Cisco Webex Meetings site specified previously.
Note: Customers on lockdown sites will not automatically get updated
versions of the Cisco Webex Network Recording Player and Cisco Webex
Player. Contact Webex Support to update a Cisco Webex site and get the
updated version of the Cisco Webex Recording Players from http://
www.webex.com/play-webex-recording.html.
Cisco Bug First Fixed Release
ID WBS31 WBS32 WBS33 Webex Meetings Webex Meetings
Online Server
CSCvi02621 31.23 32.15 33.2
CSCvi02965 1.3.35
CSCvi63329 31.23 32.15 33.2
CSCvi63333 3.0MR1
CSCvi63335 1.3.35
CSCvi63374 31.23 32.15 33.2
CSCvi63376 3.0MR1
CSCvi63377 1.3.35
33.0.6
CSCvi63391 31.23 32.15 33.1.1
33.2
CSCvi63392 3.0MR1
CSCvi63396 1.3.35
CSCvi63495 31.23 32.15 33.2
CSCvi63497 3.0MR1
CSCvi63498 1.3.35
CSCvi82684 31.23 33.2
CSCvi82700 3.0MR1
CSCvi82705 1.3.35
CSCvi82725 31.23 32.15 33.2
CSCvi82737 3.0MR1
CSCvi82742 1.3.35
CSCvi82760 31.23 32.15 33.2
CSCvi82771 1.3.35
CSCvj51284 32.15 33.2
CSCvj51294 1.3.35
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 These vulnerabilities were reported to Cisco by Fortinet and Trend Micro as
follows:
Cisco Bug IDs Reporter
Kushal Arvind
CSCvi02621, CSCvi02965 Shah of
Fortinet's
FortiGuard Labs
CSCvi63329, CSCvi63333, CSCvi63335, CSCvi63374, CSCvi63376, b0nd working
CSCvi63377, CSCvi63391, CSCvi63392, CSCvi63396, CSCvi82684, with Trend
CSCvi82700, CSCvi82705, CSCvi82725, CSCvi82737, CSCvi82742, Micro's Zero
CSCvj51284, CSCvj51294 Day Initiative
Steven Seeley
of Source
CSCvi63495, CSCvi63497, CSCvi63498, CSCvi82760, CSCvi82771 Incite working
with Trend
Micro's Zero
Day Initiative
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.
Subscribe to Cisco Security Notifications
o Subscribe
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20180718-webex-rce
Revision History
+----------+----------------------------+----------+---------+----------------+
| Version | Description | Section | Status | Date |
+----------+----------------------------+----------+---------+----------------+
| 1.0 | Initial public release. | -- | Final | 2018-July-18 |
+----------+----------------------------+----------+---------+----------------+
Legal Disclaimer
o THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND
OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT
OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES
THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits the
distribution URL is an uncontrolled copy and may lack important information
or contain factual errors. The information in this document is intended for
end users of Cisco products.
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.
- ---
Cisco Webex Teams Remote Code Execution Vulnerability
Medium
Advisory ID:
cisco-sa-20180718-webex-teams-rce
First Published:
2018 July 18 16:00 GMT
Version 1.0:
Final
Workarounds:
No workarounds available
Cisco Bug IDs:
CSCvh66250
CVE-2018-0387
CWE-20
CVSS Score:
Base 6.3
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:X/RL:X/RC:X
CVE-2018-0387
CWE-20
Summary
A vulnerability in Cisco Webex Teams could allow an unauthenticated, remote
attacker to execute arbitrary code on the user's device, possibly with
elevated privileges.
The vulnerability occurs because Cisco Webex Teams does not properly
sanitize input. An attacker could exploit the vulnerability by sending a
user a malicious link and persuading the user to follow the link. A
successful exploit could allow the attacker to execute arbitrary code on
the user's system.
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-20180718-webex-teams-rce
Affected Products
o Vulnerable Products
This vulnerability affects Cisco Webex Teams for Windows and Cisco Webex
Teams for MacOS. For information about affected software releases, consult
the Cisco bug ID(s) at the top of this advisory.
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 Cisco Webex
Teams for Android or Cisco Webex Teams for iPhone.
Workarounds
o There are no workarounds that address this vulnerability.
Fixed Software
o For information about fixed software releases, consult the Cisco bug ID(s)
at the top of this advisory.
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.
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 Alexey Sintsov from HERE Technologies 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.
Subscribe to Cisco Security Notifications
o Subscribe
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20180718-webex-teams-rce
Revision History
+----------+----------------------------+----------+---------+----------------+
| Version | Description | Section | Status | Date |
+----------+----------------------------+----------+---------+----------------+
| 1.0 | Initial public release. | -- | Final | 2018-July-18 |
+----------+----------------------------+----------+---------+----------------+
Legal Disclaimer
o THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND
OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT
OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES
THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits the
distribution URL is an uncontrolled copy and may lack important information
or contain factual errors. The information in this document is intended for
end users of Cisco products.
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.
- --------------------------END INCLUDED TEXT--------------------
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