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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. This vulnerability affects Cisco Meeting Server (CMS) deployments that are running a CMS Software release prior to Release 2.0.16, 2.1.11, or 2.2.6. Cisco Bug IDs: CSCvf51127.

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配置

Cisco Meeting Server Traversal Using Relay NAT服务器安全漏洞

Cisco Meeting Server（前称Acano Conferencing Server，CMS）是美国思科（Cisco）公司的一套包含音频、视频的会议服务器软件。Traversal Using Relay NAT(TURN) server是其中的一个多媒体应用的遍历服务器。 CMS 2.0.16之前的版本、2.1.11之前的版本和2.2.6之前的版本中的TURN服务器存在安全漏洞，该漏洞源于TURN服务器不正确的默认配置。远程攻击者可通过未授权将TURN服务器连接到Call Bridge利用该漏

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