Cisco Security Advisory
Cisco TelePresence Video Communication Server Test Validation Script Issue
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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 and will soon be replaced with fixed software images. 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.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181107-vcsd
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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.
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There are no workarounds that address this issue.
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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.
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This issue was found during internal security testing.
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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.
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Show LessVersion Description Section Status Date 1.1 Added information about Special File access. Summary Final 2018-November-08 1.0 Initial public release. — Final 2018-November-07
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