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CVE-2021-40376 Explained : Impact and Mitigation

Learn about CVE-2021-40376, a vulnerability in otris Update Manager 1.2.1.0 that allows local users to achieve SYSTEM access and potential remote attacks. Find mitigation steps and prevention measures here.

This CVE-2021-40376 article provides details about a vulnerability in otris Update Manager 1.2.1.0 that allows local users to achieve SYSTEM access and potential remote attacks.

Understanding CVE-2021-40376

This section delves into the specifics of CVE-2021-40376.

What is CVE-2021-40376?

CVE-2021-40376 highlights a security flaw in otris Update Manager 1.2.1.0 that enables local users to gain SYSTEM access through unauthenticated calls to exposed interfaces via a .NET named pipe. There is also a possibility of remote exploitation by using WsHTTPBinding for HTTP traffic on TCP port 9000.

The Impact of CVE-2021-40376

The vulnerability can lead to severe consequences:

        Local users achieving SYSTEM access
        Potential remote attacks via WsHTTPBinding on port 9000

Technical Details of CVE-2021-40376

This section outlines the technical aspects of CVE-2021-40376.

Vulnerability Description

The vulnerability in otris Update Manager 1.2.1.0 allows local users to escalate privileges to SYSTEM and opens the door for remote attacks using WsHTTPBinding over port 9000.

Affected Systems and Versions

        Affected Product: otris Update Manager 1.2.1.0
        Vendor: otris
        Versions: All versions are affected

Exploitation Mechanism

The vulnerability is exploited by making unauthenticated calls to exposed interfaces over a .NET named pipe, enabling local users to gain SYSTEM access. Remote attacks can use WsHTTPBinding over TCP port 9000.

Mitigation and Prevention

This section provides guidance on mitigating the risks posed by CVE-2021-40376.

Immediate Steps to Take

        Implement strong authentication mechanisms
        Monitor and restrict access to exposed interfaces
        Apply the principle of least privilege
        Disable unnecessary services

Long-Term Security Practices

        Regular security training for users
        Conduct security audits and assessments
        Stay informed about security best practices

Patching and Updates

        Apply security patches provided by the vendor
        Keep systems up to date with the latest versions to address the vulnerability

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