ESB-2017.2328 - [Cisco] Cisco Meeting Server : Access confidential data - Existing account 2017-09-14

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.2328
         Cisco Meeting Server TURN Server Unauthorized Access and
                   Information Disclosure Vulnerability
                             14 September 2017

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

Product:           Cisco Meeting Server
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Access Confidential Data -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-12249  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170913-cmsturn

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Cisco Security Advisory: Cisco Meeting Server TURN Server Unauthorized Access
and Information Disclosure Vulnerability

Advisory ID: cisco-sa-20170913-cmsturn

Revision: 1.0

For Public Release: 2017 September 13 16:00 GMT

Last Updated: 2017 September 13 16:00 GMT

CVE ID(s): CVE-2017-12249

CVSS Score v(3): 9.1 CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

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Summary 
A vulnerability in the Traversal Using Relay NAT (TURN) server
included with Cisco Meeting Server (CMS) could allow an authenticated, remote
attacker to gain unauthenticated or unauthorized access to components of or 
sensitive information in an affected system.

The vulnerability is due to an incorrect default configuration of the TURN 
server, which could expose internal interfaces and ports on the external 
interface of an affected system. An attacker could exploit this vulnerability
by using a TURN server to perform an unauthorized connection to a Call Bridge,
a Web Bridge, or a database cluster in an affected system, depending on the 
deployment model and CMS services in use. A successful exploit could allow the
attacker to gain unauthenticated access to a Call Bridge or database cluster 
in an affected system or gain unauthorized access to sensitive meeting 
information in an affected system. To exploit this vulnerability, the attacker
must have valid credentials for the TURN server of the affected system.

Cisco has released software updates that address this vulnerability. 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-20170913-cmsturn
["https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170913-cmsturn"]

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