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AUSCERT External Security Bulletin Redistribution
Cisco TelePresence Collaboration Endpoint, TelePresence
Codec, and RoomOS Software Path Traversal Vulnerability
24 January 2020
AusCERT Security Bulletin Summary
Product: Cisco TelePresence Collaboration Endpoint (CE)
Cisco TelePresence Codec (TC)
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Modify Arbitrary Files -- Existing Account
Access Confidential Data -- Existing Account
CVE Names: CVE-2020-3143
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Cisco TelePresence Collaboration Endpoint, TelePresence Codec, and RoomOS
Software Path Traversal Vulnerability
Advisory ID: cisco-sa-telepresence-path-tr-wdrnYEZZ
First Published: 2020 January 22 16:00 GMT
Last Updated: 2020 January 22 20:52 GMT
Version 1.2: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvs45241CSCvs67675CSCvs67680
A vulnerability in the video endpoint API (xAPI) of Cisco TelePresence
Collaboration Endpoint (CE) Software, Cisco TelePresence Codec (TC)
Software, and Cisco RoomOS Software could allow an authenticated, remote
attacker to conduct directory traversal attacks on an affected device.
The vulnerability is due to insufficient validation of user-supplied input
to the xAPI of the affected software. An attacker could exploit this
vulnerability by sending a crafted request to the xAPI. A successful
exploit could allow the attacker to read and write arbitrary files in the
system. To exploit this vulnerability, an attacker would need either an
In-Room Control or administrator account.
Cisco has released software updates that address the vulnerability
described in this advisory. There are no workarounds that address this
This advisory is available at the following link:
This vulnerability affects the following Cisco products if they are running
a vulnerable release of Cisco TelePresence CE Software, Cisco TC Software,
or Cisco RoomOS Software:
Cisco TelePresence Integrator C Series
Cisco TelePresence MX Series
Cisco TelePresence SX Series
Cisco TelePresence System EX Series
Cisco Webex Board
Cisco Webex DX Series
Cisco Webex Room Series
For information about which Cisco software releases are vulnerable, see the
Fixed Software section 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.
There are no workarounds that address this vulnerability.
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/
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
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
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
For Cisco TelePresence CE Software or Cisco TC Software, customers are
advised to upgrade to an appropriate fixed software release as indicated in
the following table:
Affected Software Release First Fixed Release
TC 7.x (CSCvs67675) 7.3.20
CE 8.x (CSCvs45241, CSCvs67680) 8.3.8
CE 9.x (CSCvs45241, CSCvs67680) 9.8.3
CE 9.9.x (CSCvs45241, CSCvs67680) 9.9.2
CE 9.10.x (CSCvs45241, CSCvs67680) 9.10.0
For Cisco RoomOS Software, no user action is required. Cisco fixed this
vulnerability in Cisco RoomOS January Drop 1 2020 Service, which is cloud
based. Customers can determine the current remediation status or software
version by using the Help function in the service GUI.
Exploitation and Public Announcements
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.
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.
| Version | Description | Section | Status | Date |
| | Updated the Fixed | Fixed | | |
| 1.2 | Releases table with | Software | Final | 2020-January-22 |
| | further clarifications. | | | |
| 1.1 | Updated the Fixed | Fixed | Final | 2020-January-22 |
| | Releases table. | Software | | |
| 1.0 | Initial public release. | - | Final | 2020-January-22 |
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