CVE-2020-25613 : Security Advisory and Response

CVE-2020-25613 is a vulnerability discovered in Ruby versions 2.5.8 through 2.7.1, specifically affecting the WEBrick HTTP server. This vulnerability could potentially lead to an HTTP Request Smuggling attack.

Understanding CVE-2020-25613

What is CVE-2020-25613?

An issue in Ruby versions 2.5.8 through 2.7.1 allowed attackers to bypass a reverse proxy due to inadequate checking of the transfer-encoding header value in the WEBrick HTTP server.

The Impact of CVE-2020-25613

This vulnerability could be exploited by attackers to perform an HTTP Request Smuggling attack, potentially compromising the integrity and security of the affected systems.

Technical Details of CVE-2020-25613

Vulnerability Description

The vulnerability in WEBrick HTTP server in Ruby versions 2.5.8 through 2.7.1 allowed attackers to bypass reverse proxies with poor header checks, enabling HTTP Request Smuggling attacks.

Affected Systems and Versions

Ruby versions 2.5.8, 2.6.x, and 2.7.x

Exploitation Mechanism

Attackers could exploit this vulnerability to bypass reverse proxies with weak header checks, potentially leading to HTTP Request Smuggling attacks.

Mitigation and Prevention

Immediate Steps to Take

Update Ruby to a patched version that addresses the vulnerability.
Monitor network traffic for any signs of HTTP Request Smuggling attempts.

Long-Term Security Practices

Regularly update Ruby and other software components to mitigate future vulnerabilities.
Implement secure coding practices to prevent similar issues.

Patching and Updates

Ensure timely application of security patches and updates to Ruby and related dependencies.