CVE-2019-3552 : Vulnerability Insights and Analysis

Facebook Thrift servers prior to v2019.02.18.00 were vulnerable to a denial of service attack due to a parsing issue with unknown field types.

Understanding CVE-2019-3552

C++ Facebook Thrift servers using cpp2 were susceptible to a specific type of attack that could lead to denial of service.

What is CVE-2019-3552?

Prior to version v2019.02.18.00, Facebook Thrift servers did not handle messages with unknown field types correctly, allowing malicious clients to cause parsing delays and potential denial of service.

The Impact of CVE-2019-3552

This vulnerability could be exploited by attackers to send concise messages that would significantly delay server parsing, potentially leading to denial of service.

Technical Details of CVE-2019-3552

Facebook Thrift servers were affected by a parsing issue related to unknown field types.

Vulnerability Description

Malicious clients could exploit the vulnerability by sending messages with unknown field types, causing significant parsing delays on the server.

Affected Systems and Versions

Product: Facebook Thrift
Vendor: Facebook
Versions affected: v2019.02.18.00 and below

Exploitation Mechanism

Attackers could send concise messages with unknown field types, triggering parsing delays on the server and potentially resulting in denial of service.

Mitigation and Prevention

Steps to address and prevent the CVE-2019-3552 vulnerability.

Immediate Steps to Take

Update Facebook Thrift servers to version v2019.02.18.00 or newer.
Monitor server logs for unusual parsing delays.
Implement network-level protections to mitigate denial of service attacks.

Long-Term Security Practices

Regularly update and patch Facebook Thrift servers.
Conduct security audits to identify and address parsing vulnerabilities.

Patching and Updates

Apply patches provided by Facebook to fix the parsing issue.