CVE-2019-5419 : Exploit Details and Defense Strategies
Learn about CVE-2019-5419, a denial of service vulnerability in Rails' Action View component. Find out how to mitigate the issue and protect your systems from exploitation.
A potential security vulnerability has been identified in Action View, a component of Rails, affecting versions prior to 5.2.2.1, 5.1.6.2, 5.0.7.2, and 4.2.11.1. Exploiting this vulnerability involves sending specially crafted accept headers, leading to 100% CPU usage and server unresponsiveness.
Understanding CVE-2019-5419
This CVE involves a denial of service vulnerability in Rails' Action View component.
What is CVE-2019-5419?
CVE-2019-5419 is a security vulnerability in Rails' Action View component that can be exploited by sending crafted accept headers, causing server unresponsiveness.
The Impact of CVE-2019-5419
The vulnerability can lead to 100% CPU usage, rendering the server unresponsive, impacting system availability and performance.
Technical Details of CVE-2019-5419
This section provides technical details about the vulnerability.
Vulnerability Description
The vulnerability in Action View (Rails) <5.2.2.1, <5.1.6.2, <5.0.7.2, <4.2.11.1 allows specially crafted accept headers to cause 100% CPU consumption and server unresponsiveness.
Affected Systems and Versions
- Affected versions: 5.2.2.1, 5.1.6.2, 5.0.7.2, 4.2.11.1
- Component: Action View in Rails
Exploitation Mechanism
Exploiting the vulnerability involves sending specifically crafted accept headers to the server, triggering excessive CPU usage and rendering the server unresponsive.
Mitigation and Prevention
Protect your systems from CVE-2019-5419 with the following steps:
Immediate Steps to Take
- Update Rails to versions 5.2.2.1, 5.1.6.2, 5.0.7.2, or 4.2.11.1 to mitigate the vulnerability.
- Monitor server performance for any signs of excessive CPU usage.
Long-Term Security Practices
- Regularly update and patch Rails and its components to address security vulnerabilities.
- Implement network and application firewalls to filter and monitor incoming traffic.
Patching and Updates
- Stay informed about security updates and advisories from Rails and related vendors.
- Apply patches promptly to ensure your systems are protected against known vulnerabilities.