CVE-2017-12311 Explained : Impact and Mitigation
Learn about CVE-2017-12311, a vulnerability in Cisco Meeting Server's H.264 decoder function allowing remote attackers to disrupt the media process, leading to a denial of service (DoS) situation. Find mitigation steps and long-term security practices here.
A vulnerability in the H.264 decoder function of Cisco Meeting Server allows an unauthorized remote attacker to disrupt the media process, causing a denial of service (DoS) situation.
Understanding CVE-2017-12311
This CVE involves a flaw in the H.264 decoder function of Cisco Meeting Server, potentially leading to a DoS attack.
What is CVE-2017-12311?
The vulnerability in the H.264 decoder function of Cisco Meeting Server enables an unauthenticated attacker to trigger a restart of the media process by sending a specific type of H.264 frame.
The Impact of CVE-2017-12311
- An unauthorized remote attacker can exploit the vulnerability to disrupt the media process of Cisco Meeting Server, causing a brief interruption in service.
- The attacker can force the media process to restart, leading to a DoS condition.
Technical Details of CVE-2017-12311
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The flaw allows an attacker to send an H.264 frame with an invalid picture parameter set (PPS) value, triggering a restart of the media process.
Affected Systems and Versions
- Product: Cisco Meeting Server
- Version: Cisco Meeting Server
Exploitation Mechanism
- Attackers can exploit the vulnerability remotely without authentication by sending a malformed H.264 frame to the targeted device.
Mitigation and Prevention
Protecting systems from CVE-2017-12311 involves taking immediate and long-term security measures.
Immediate Steps to Take
- Apply vendor-provided patches or updates to mitigate the vulnerability.
- Monitor network traffic for any suspicious activity targeting the H.264 decoder function.
Long-Term Security Practices
- Implement network segmentation to limit the impact of potential attacks on critical systems.
- Regularly update and patch software to address known vulnerabilities.
- Conduct security training for employees to raise awareness of potential threats.
- Utilize intrusion detection and prevention systems to detect and block malicious activities.
- Stay informed about security advisories and best practices to enhance overall cybersecurity.
Patching and Updates
- Cisco may release patches or updates to address the vulnerability. Stay informed through official channels for remediation steps.