CVE-2021-35957 : Vulnerability Insights and Analysis

Stormshield Endpoint Security Evolution versions 2.0.0 through 2.0.2 are susceptible to a security vulnerability that fails to protect against local administrators who can substitute Visual C++ runtime DLLs with malicious ones.

Understanding CVE-2021-35957

This section will delve into the details of CVE-2021-35957, highlighting its impact, technical aspects, and how to mitigate the risks associated with this vulnerability.

What is CVE-2021-35957?

The CVE-2021-35957 vulnerability pertains to Stormshield Endpoint Security Evolution versions 2.0.0 through 2.0.2, where local administrators can compromise the system by replacing Visual C++ runtime DLLs with malicious ones.

The Impact of CVE-2021-35957

This vulnerability enables threat actors to escalate their privileges on the affected system, potentially leading to unauthorized access, data theft, or further exploitation of the compromised environment.

Technical Details of CVE-2021-35957

Let's explore the technical aspects of CVE-2021-35957, including the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

Stormshield Endpoint Security Evolution 2.0.0 through 2.0.2 fails to adequately defend against local administrators who can swap Visual C++ runtime DLLs in %WINDIR%\system32 with malicious alternatives.

Affected Systems and Versions

The vulnerable versions include Stormshield Endpoint Security Evolution 2.0.0, 2.0.1, and 2.0.2.

Exploitation Mechanism

By replacing the legitimate Visual C++ runtime DLLs with malicious ones in the specified directory, local administrators can bypass security mechanisms and execute unauthorized code on the system.

Mitigation and Prevention

Discover the essential steps to mitigate the risks associated with CVE-2021-35957 and secure your systems effectively.

Immediate Steps to Take

Implement strict access controls, monitor DLL files in critical directories, and apply the latest security patches to prevent unauthorized DLL replacements.

Long-Term Security Practices

Enforce the principle of least privilege, conduct regular security audits, and educate users about the dangers of DLL manipulation to enhance overall system security.

Patching and Updates

Stay informed about security advisories from Stormshield, and promptly apply patches and updates released by the vendor to remediate the vulnerability and fortify your defenses.