CVE-2019-3565 : What You Need to Know

Facebook Thrift servers using legacy C++ implementation had a vulnerability allowing malicious clients to exploit and potentially cause denial of service.

Understanding CVE-2019-3565

Facebook Thrift servers using the legacy C++ implementation were susceptible to a denial-of-service vulnerability.

What is CVE-2019-3565?

Legacy C++ Facebook Thrift servers had a vulnerability where they did not produce errors when receiving messages with containers of unknown field types, potentially leading to denial of service.

The Impact of CVE-2019-3565

Malicious clients could exploit this vulnerability by sending small messages that would take a long time for the server to process, potentially causing a denial of service.

Technical Details of CVE-2019-3565

Facebook Thrift servers using the legacy C++ implementation were affected by a denial-of-service vulnerability.

Vulnerability Description

The vulnerability allowed malicious clients to send messages with containers of unknown field types, causing servers to process them slowly and potentially leading to denial of service.

Affected Systems and Versions

Product: Facebook Thrift
Vendor: Facebook
Affected Version: v2019.05.06.00 and versions prior to it

Exploitation Mechanism

Malicious clients could exploit the vulnerability by sending small messages that would take a long time for the server to process, potentially causing denial of service.

Mitigation and Prevention

Immediate Steps to Take:

Update Facebook Thrift servers to version v2019.05.06.00 or newer to mitigate the vulnerability. Long-Term Security Practices:
Regularly update and patch software to prevent known vulnerabilities.
Implement network monitoring and intrusion detection systems.
Conduct security audits and assessments periodically.
Educate users and administrators on secure coding practices.
Follow secure coding guidelines and best practices.
Monitor and analyze server performance for unusual behavior.
Implement rate limiting and request validation mechanisms.
Stay informed about security advisories and updates from vendors.
Consider implementing additional security layers such as firewalls and access controls.
Regularly backup critical data and have a disaster recovery plan in place.
Engage in security training and awareness programs for employees.

Patching and Updates

Facebook released a patch in version v2019.05.06.00 to address the vulnerability in Facebook Thrift servers.