CVE-2018-6346 Explained : Impact and Mitigation

Proxygen versions earlier than v2018.12.31.00 may encounter a potential denial-of-service problem related to how it handles invalid HTTP2 priority settings, particularly when there is a circular dependency.

Understanding CVE-2018-6346

A potential denial-of-service issue in the Proxygen handling of invalid HTTP2 priority settings (specifically a circular dependency).

What is CVE-2018-6346?

CVE-2018-6346 is a vulnerability in Proxygen versions prior to v2018.12.31.00 that could lead to a denial-of-service problem due to the mishandling of invalid HTTP2 priority settings.

The Impact of CVE-2018-6346

This vulnerability could be exploited to cause a denial-of-service condition on systems running affected versions of Proxygen.

Technical Details of CVE-2018-6346

Proxygen vulnerability details and affected systems.

Vulnerability Description

The issue arises from the incorrect handling of invalid HTTP2 priority settings, specifically in cases of circular dependencies.

Affected Systems and Versions

Product: Proxygen
Vendor: Facebook
Affected Versions: v2018.12.31.00 and earlier

Exploitation Mechanism

The vulnerability can be exploited by sending crafted HTTP2 requests with malicious circular dependencies, triggering the denial-of-service condition.

Mitigation and Prevention

Steps to mitigate and prevent the CVE-2018-6346 vulnerability.

Immediate Steps to Take

Update Proxygen to version v2018.12.31.00 or later to eliminate the vulnerability.
Monitor network traffic for any suspicious HTTP2 requests.

Long-Term Security Practices

Regularly update and patch Proxygen to ensure the latest security fixes are in place.
Implement network monitoring and intrusion detection systems to detect and prevent potential attacks.

Patching and Updates

Apply patches provided by Facebook for Proxygen to address the vulnerability.