Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2020.0283
Cisco Webex Teams Adaptive Cards Denial of Service Vulnerability
28 January 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Webex Teams
Publisher: Cisco Systems
Operating System: Windows
Impact/Access: Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-3131
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-cards-dos-FWzNcXPq
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Webex Teams Adaptive Cards Denial of Service Vulnerability
Priority: Medium
Advisory ID: cisco-sa-webex-cards-dos-FWzNcXPq
First Published: 2020 January 22 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds availableCisco Bug IDs: CSCvs25793
CVE-2020-3131
CWE-400
CVSS Score:
6.5 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:X/RL:X/RC:X
Summary
o [CVE-2020-3131_su]
A vulnerability in the Cisco Webex Teams client for Windows could allow an
authenticated, remote attacker to cause the client to crash, resulting in a
denial of service (DoS) condition. The attacker needs a valid developer
account to exploit this vulnerability.
The vulnerability is due to insufficient input validation when processing
received adaptive cards. The attacker could exploit this vulnerability by
sending an adaptive card with malicious content to an existing user of the
Cisco Webex Teams client for Windows. A successful exploit could allow the
attacker to cause the targeted user's client to crash continuously.
Cisco has released software updates that address the vulnerability
described in this advisory. 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-cards-dos-FWzNcXPq
[/CVE-2020-3131_su]
Affected Products
o [CVE-2020-3131_ap]
[/CVE-2020-3131_ap]
Vulnerable Products
[CVE-2020-3131_vp]
This vulnerability was introduced in Cisco Webex Teams client for Windows
Release 3.0.13131.
See the Details section in the bug ID(s) at the top of this advisory for
the most complete and current information.
[/CVE-2020-3131_vp]
Products Confirmed Not Vulnerable
[CVE-2020-3131_nv]
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
[/CVE-2020-3131_nv]
Workarounds
o [CVE-2020-3131_wa]
There are no workarounds that address this vulnerability.
[/CVE-2020-3131_wa]
Fixed Software
o [CVE-2020-3131_fs]
Cisco has released 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
[/CVE-2020-3131_fs]
[CVE-2020-3131_fr]
Fixed Releases
At the time of publication, Cisco Webex Teams client for Windows releases
3.0.14234 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.
[/CVE-2020-3131_fr]
Exploitation and Public Announcements
o [CVE-2020-3131_ex]
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.
[/CVE-2020-3131_ex]
Source
o [CVE-2020-3131_vs]
This vulnerability was found during internal security testing.
[/CVE-2020-3131_vs]
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-cards-dos-FWzNcXPq
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2020-JAN-22 |
+----------+---------------------------+----------+--------+--------------+
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967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=cr+k
-----END PGP SIGNATURE-----