CVE-2023-52361 – VerifiedBoot Module Authentication Error Vulnerability Affecting Integrity

The vulnerability CVE-2023-52361 has been identified in the VerifiedBoot module, specifically relating to a weakness that may lead to authentication errors. Successful exploitation of this vulnerability could potentially compromise system integrity. In this post, we will explore the details of this vulnerability, discuss how it can be exploited, and examine the potential impact on affected systems.

Overview

The VerifiedBoot module acts as a security feature designed to ensure the integrity and authenticity of the software running on a device. Through a series of checks on the boot process, it ensures that the device is running an unmodified and uncorrupted version of the software. However, a flaw has been discovered which could allow an attacker to exploit this authentication process and impact the integrity of the system.

Vulnerability Details

The CVE-2023-52361 vulnerability originates from an insufficient input validation routine within the VerifiedBoot module. Attackers can exploit this weakness by crafting a malicious payload, which, when processed by the vulnerable module, could lead to authentication failures and ultimately allow for unauthorized access to the system.

Here's a sample code snippet that demonstrates the vulnerability

//Sample Vulnerable Code Snippet in VerifiedBoot Module
int authenticate(BootData *data) {
    int result;
    int isAuthenticated = ;
    BootInfo bootInfo;

    if(!validateData(data)) {
        return -1; // Data is invalid, abort authentication process.
    }

    // Authentication Logic - Vulnerable Code
    result = processBootInfo(data, &bootInfo);
    if(result == ) {
        isAuthenticated = 1;
    }

    return isAuthenticated;
}

In this example, validateData fails to effectively validate the input data, and processBootInfo can be potentially exploited by attackers to craft a malicious payload that bypasses authentication.

Exploit Details

Exploiting the CVE-2023-52361 vulnerability requires an attacker to have prior knowledge of the target system's configuration and access to create and inject malicious payloads. The attacker can craft a malicious payload that bypasses input validation and the authentication process in the VerifiedBoot module, allowing for unauthorized access to sensitive data and possibly altering system integrity.

Mitigation Measures

Developers and system administrators should apply the necessary patches and updates as they become available to remediate this vulnerability. Additionally, implementing proper input validation, adhering to secure coding practices, and performing regular security audits can help mitigate the risk associated with this vulnerability.

Original References

1. CVE-2023-52361 Official Advisory
2. VerifiedBoot Module Documentation

Conclusion

In summary, the CVE-2023-52361 vulnerability in the VerifiedBoot module may cause authentication failures, leading to unauthorized access and impact on the integrity of the system. It's crucial to address this issue promptly by implementing the necessary updates and adhering to secure coding practices to safeguard the system from potential threats and maintain a robust security posture.

Timeline

Published on: 02/18/2024 03:15:08 UTC
Last modified on: 12/06/2024 20:04:02 UTC