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AUSCERT External Security Bulletin Redistribution
ESB-2018.3503.3
Cisco TelePresence Video Communication Server Test Validation Script Issue
21 November 2018
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco TelePresence
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Reduced Security -- Unknown/Unspecified
Resolution: Patch/Upgrade
CVE Names: CVE-2016-5195
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181107-vcsd
Revision History: November 21 2018: Added Fixed Software release information
November 9 2018: Added information about Special File access.
November 8 2018: Initial Release
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco TelePresence Video Communication Server Test Validation Script Issue
Priority: Informational
Advisory ID: cisco-sa-20181107-vcsd
First Published: 2018 November 7 09:00 GMT
Last Updated: 2018 November 20 18:27 GMT
Version 1.2: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvn17278
Summary
o A failure in the final QA validation step of the automated software build
system for the Cisco Expressway Series and Cisco TelePresence Video
Communication Server (VCS) software inadvertently allowed a set of sample,
dormant exploit code used internally by Cisco in validation scripts to be
included in shipping software images. This includes an exploit for the
Dirty CoW vulnerability (CVE-2016-5195). The purpose of this QA validation
step is to make sure the Cisco product contains the required fixes for this
vulnerability.
The presence of the sample, dormant exploit code does not represent nor
allow an exploitable vulnerability on the product, nor does it present a
risk to the product itself as all of the required patches for this
vulnerability have been integrated into all shipping software images.
The affected software images have proactively been removed from the Cisco
Software Center. Bug ID CSCvn17278 has been opened to track this issue.
Customers that still require access to the affected software images and
have a valid cisco.com account will need to open a case with the Cisco TAC
and submit a request for Special File access in order to download the
software images.
Cisco has released software updates that address this issue. There are no
workarounds that address this issue.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20181107-vcsd
Affected Products
o Vulnerable Products
This issue affects Cisco Expressway Series and Cisco TelePresence Video
Communication Server (VCS) image versions X8.9 through X8.11.3. Versions
prior to X8.9 are not affected by this issue.
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 issue.
Fixed Software
o Fixed Releases
This issue is fixed in Cisco TelePresence Video Communication Server and
Expressway release version x8.11.4.
The software can be downloaded from the Software Center on Cisco.com by
clicking Browse all and navigating to the following locations:
Cisco TelePresence Video Communication Server and Expressway
1. Navigate to Unified Communications > Communication Gateways > Expressway
Series > Expressway > TelePresence Software- X8.11.4.
2. From the left panel click X8.11.4 under Latest Release.
3. Choose the correct X8.11.4 file for your deployment type.
Cisco TelePresence Video Communication Server Model
1. Navigate to Unified Communications > Communication Gateways > Video
Gateways > TelePresence Video Communication Server (VCS) >
TelePresenceVideo Communication Server Model > TelePresence Software-
X8.11.4
2. From the left panel click X8.11.4 under Latest Release.
3. Choose the correct X8.11.4 file for your deployment type.
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 issue that is described in
this advisory.
Source
o This issue 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.
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20181107-vcsd
Revision History
o
+---------+----------------------------+----------+--------+------------------+
| Version | Description | Section | Status | Date |
+---------+----------------------------+----------+--------+------------------+
| 1.2 | Added Fixed Software | Fixed | Final | 2018-November-20 |
| | release information | Software | | |
+---------+----------------------------+----------+--------+------------------+
| 1.1 | Added information about | Summary | Final | 2018-November-08 |
| | Special File access. | | | |
+---------+----------------------------+----------+--------+------------------+
| 1.0 | Initial public release. | -- | Final | 2018-November-07 |
+---------+----------------------------+----------+--------+------------------+
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.
- --------------------------END INCLUDED TEXT--------------------
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