CVE-2019-0197 : Vulnerability Insights and Analysis

A security flaw has been discovered in versions 2.4.34 to 2.4.38 of Apache HTTP Server that can lead to a crash under specific conditions.

Understanding CVE-2019-0197

This CVE details a vulnerability in Apache HTTP Server versions 2.4.34 to 2.4.38 that can result in a crash when certain configurations are enabled.

What is CVE-2019-0197?

CVE-2019-0197 is a security flaw in Apache HTTP Server versions 2.4.34 to 2.4.38 that can cause a crash under specific circumstances related to the HTTP/2 protocol.

The Impact of CVE-2019-0197

The vulnerability can lead to a misconfiguration and crash if an Upgrade request is made from http/1.1 to http/2 and it is not the first request on a connection.

Technical Details of CVE-2019-0197

This section provides more technical insights into the vulnerability.

Vulnerability Description

The flaw occurs when enabling HTTP/2 for a http: host or enabling H2Upgrade for h2 on a https: host, potentially causing a crash.

Affected Systems and Versions

Product: Apache HTTP Server
Vendor: Apache Software Foundation
Versions: 2.4.34 to 2.4.38

Exploitation Mechanism

The issue arises when an Upgrade request from http/1.1 to http/2 is not the first request on a connection, leading to a misconfiguration and subsequent crash.

Mitigation and Prevention

To address CVE-2019-0197, consider the following steps:

Immediate Steps to Take

Disable HTTP/2 for http: hosts and H2Upgrade for h2 on https: hosts if not required.
Regularly monitor for updates and patches from Apache Software Foundation.

Long-Term Security Practices

Implement a robust patch management process.
Conduct regular security audits and assessments to identify vulnerabilities.

Patching and Updates

Stay informed about security advisories and updates from Apache Software Foundation.