CVE-2023-25690 : What You Need to Know

This CVE-2023-25690 article provides detailed information about a security vulnerability in the Apache HTTP Server, impacting versions 2.4.0 through 2.4.55.

Understanding CVE-2023-25690

CVE-2023-25690 is a vulnerability in the Apache HTTP Server that allows for a HTTP Request Smuggling attack under specific configurations involving mod_proxy, mod_rewrite, and ProxyPassMatch extensions.

What is CVE-2023-25690?

Some configurations in Apache HTTP Server versions 2.4.0 through 2.4.55 are vulnerable to HTTP Request Smuggling attacks when mod_proxy is enabled along with RewriteRule or ProxyPassMatch. This vulnerability could lead to the bypass of access controls, unintended proxying of URLs to origin servers, and cache poisoning.

The Impact of CVE-2023-25690

The impact of this vulnerability includes potential access control bypasses, unintended proxying of URLs, and cache poisoning. Users are advised to update to at least version 2.4.56 of Apache HTTP Server to mitigate the risk.

Technical Details of CVE-2023-25690

This section outlines key technical details of the CVE-2023-25690 vulnerability.

Vulnerability Description

The vulnerability arises due to specific configurations involving mod_proxy and RewriteRule or ProxyPassMatch that can be manipulated to perform HTTP Request Smuggling attacks, leading to security risks.

Affected Systems and Versions

The affected systems include Apache HTTP Server versions 2.4.0 through 2.4.55 where certain mod_proxy configurations are enabled, making them susceptible to exploitation.

Exploitation Mechanism

Exploitation of this vulnerability involves manipulating mod_proxy configurations along with RewriteRule or ProxyPassMatch to smuggle HTTP requests, potentially bypassing access controls and causing cache poisoning.

Mitigation and Prevention

To address CVE-2023-25690 and enhance security measures, the following steps should be taken:

Immediate Steps to Take

Users are recommended to update their Apache HTTP Server installations to version 2.4.56 or newer to mitigate the risk of HTTP Request Smuggling attacks.

Long-Term Security Practices

Implement regular security audits, configure server settings securely, and stay informed about security best practices to enhance long-term security measures.

Patching and Updates

Frequent monitoring of security advisories from Apache Software Foundation and timely application of patches and updates are crucial to maintaining a secure server environment.