CVE-2017-12249 : Exploit Details and Defense Strategies
Learn about CVE-2017-12249, a vulnerability in the TURN server of Cisco Meeting Server that could allow unauthorized access to system components and sensitive information. Find mitigation steps and affected versions here.
A weakness has been identified in the Traversal Using Relay NAT (TURN) server that comes with Cisco Meeting Server (CMS). An authenticated remote attacker could gain unauthorized access to certain components or sensitive information in a targeted system due to an incorrect default configuration of the TURN server.
Understanding CVE-2017-12249
This CVE involves a vulnerability in the TURN server included with Cisco Meeting Server (CMS) that could lead to unauthorized access to system components or sensitive information.
What is CVE-2017-12249?
The vulnerability arises from an incorrect default configuration of the TURN server, exposing internal interfaces and ports on the external interface of the affected system. Attackers with valid credentials for the TURN server could exploit this to gain unauthorized access.
The Impact of CVE-2017-12249
- An authenticated remote attacker could access sensitive information or components in the system.
- Unauthorized access to Call Bridge, Web Bridge, or database cluster could occur.
- Successful exploitation could lead to unauthorized access to confidential meeting information.
Technical Details of CVE-2017-12249
This section provides technical insights into the vulnerability.
Vulnerability Description
The vulnerability allows attackers to exploit the TURN server's incorrect default configuration, potentially leading to unauthorized access to system components and sensitive information.
Affected Systems and Versions
- Cisco Meeting Server (CMS) deployments running versions before 2.0.16, 2.1.11, or 2.2.6 are affected.
Exploitation Mechanism
- Attackers with valid credentials for the TURN server can establish unauthorized connections to Call Bridge, Web Bridge, or database clusters.
Mitigation and Prevention
Steps to mitigate and prevent exploitation of CVE-2017-12249.
Immediate Steps to Take
- Upgrade affected systems to versions 2.0.16, 2.1.11, or 2.2.6.
- Ensure TURN server configurations are secure.
Long-Term Security Practices
- Regularly monitor and update system configurations.
- Implement strong authentication mechanisms.
Patching and Updates
- Apply patches provided by Cisco to address the vulnerability.