CVE-2021-35368 : Security Advisory and Response

OWASP ModSecurity Core Rule Set versions 3.1.x, 3.2.x, and 3.3.x are vulnerable to a Request Body Bypass via a trailing pathname.

Understanding CVE-2021-35368

This vulnerability affects OWASP ModSecurity Core Rule Set versions 3.1.x, 3.2.x, and 3.3.x, potentially leading to security bypass scenarios.

What is CVE-2021-35368?

CVE-2021-35368 is a security vulnerability in the OWASP ModSecurity Core Rule Set that allows attackers to bypass request body restrictions by exploiting a trailing pathname.

The Impact of CVE-2021-35368

The impact of this vulnerability can lead to unauthorized access, data manipulation, and security rule evasion, posing a significant risk to affected systems.

Technical Details of CVE-2021-35368

In affected versions of OWASP ModSecurity Core Rule Set, the vulnerability enables threat actors to manipulate request bodies by exploiting a specific trailing pathname.

Vulnerability Description

The vulnerability allows attackers to bypass security mechanisms related to request body processing, potentially leading to malicious activities that compromise system integrity.

Affected Systems and Versions

OWASP ModSecurity Core Rule Set versions 3.1.x, 3.2.x, and 3.3.x are affected by this security flaw, exposing systems leveraging these versions to exploitation.

Exploitation Mechanism

Exploiting the trailing pathname issue grants attackers the ability to evade request body restrictions, enabling them to carry out unauthorized actions within the targeted system.

Mitigation and Prevention

Security measures should be implemented to mitigate the risks associated with CVE-2021-35368 and prevent potential exploitation.

Immediate Steps to Take

Organizations using affected versions are advised to apply security patches promptly, monitor for any suspicious activities, and implement additional security controls to detect and prevent exploitation.

Long-Term Security Practices

Enhancing overall security posture by regularly updating security tools and rules, conducting security assessments, and maintaining effective incident response protocols can help prevent similar vulnerabilities in the future.

Patching and Updates

Users are strongly recommended to update OWASP ModSecurity Core Rule Set to versions 3.1.2, 3.2.1, or 3.3.2 to address the vulnerability and enhance the security posture of their systems.