ESB-2017.2050 - [Appliance] Cisco TelePresence Video Communication Server: Denial of service - Remote/unauthenticated 2017-08-17

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.2050
          Cisco TelePresence Video Communication Server Denial of
                           Service Vulnerability
                              17 August 2017

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Cisco TelePresence Video Communication Server
Publisher:         Cisco Systems
Operating System:  Network Appliance
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-6790  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170816-vcs

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Cisco Security Advisory

Cisco TelePresence Video Communication Server Denial of Service Vulnerability

Medium

Advisory ID: cisco-sa-20170816-vcs

First Published: 2017 August 16 16:00  GMT

Version 1.0: Final

Workarounds: No workarounds available

Cisco Bug IDs: CSCve32897

CVSS Score: Base 6.8, Temporal 6.8

CVE-2017-6790
CWE-399

Summary

A vulnerability in the Session Initiation Protocol (SIP) on the Cisco
TelePresence Video Communication Server (VCS) could allow an unauthenticated,
remote attacker to cause a denial of service (DoS) condition on the
targeted appliance.

The vulnerability is due to excessive SIP traffic sent to the device. An
attacker could exploit this vulnerability by transmitting large volumes
of SIP traffic to the VCS. An exploit could allow the attacker to cause
a complete DoS condition on the targeted 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-20170816-vcs

Affected Products

Vulnerable Products

This vulnerability affects Cisco TelePresence Video Communication Server
(VCS). For information about affected software releases, consult the Cisco
bug ID(s) at the top of this advisory.

Products Confirmed Not Vulnerable

No other Cisco products are currently known to be affected by this
vulnerability.

Workarounds

There are no workarounds that address this vulnerability.

Fixed Software

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

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

This vulnerability was internally reported to Cisco.

URL

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170816-vcs

Revision History

Version		Description		Section		Status	Date
1.0		Initial public release.	--		Final	2017-August-16

Legal Disclaimer

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.

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