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CVE-2024-31853: Critical TLS Server Certificate Verification Vulnerability in SICAM TOOLBOX II

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Overview

The cybersecurity landscape is fraught with challenges, amongst which is the newly identified vulnerability CVE-2024-31853. This critical weakness has been found in SICAM TOOLBOX II, impacting all versions prior to V07.11. The vulnerability is particularly alarming as it exposes a glaring loophole in the secure HTTPS connection establishment process with the TLS server of a managed device. The application fails to validate the extended key usage attribute of the device’s certificate, paving the way for potential on-path network (MitM) attacks.
As a result, this vulnerability holds significant implications for any organization utilizing SICAM TOOLBOX II, as it could lead to system compromise or data leakage. The security flaw is hence of paramount concern and necessitates immediate attention and mitigation.

Vulnerability Summary

CVE ID: CVE-2024-31853
Severity: Critical (CVSS: 8.1)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

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Product | Affected Versions

SICAM TOOLBOX II | All versions < V07.11 How the Exploit Works

This exploit takes advantage of the security oversight in SICAM TOOLBOX II’s HTTPS connection establishment process. Specifically, when establishing a secure connection to the TLS server of a managed device, the application does not verify the extended key usage attribute of the server’s certificate.
This absence of verification can be exploited by an attacker to conduct an on-path network (MitM) attack. The attacker can present a certificate that, although valid in itself, is not intended for the specific server’s identity. Since the application does not check for this, it accepts the certificate, and the attacker gains a foothold to potentially compromise the system or leak data.

Conceptual Example Code

Here’s a conceptual example of how an attacker may exploit this vulnerability:

GET /secure/connection HTTP/1.1
Host: vulnerable.server.com
Connection: Upgrade
Upgrade: TLS/1.3
---- BEGIN CERTIFICATE ----
[Insert malicious certificate here]
---- END CERTIFICATE ----

In this example, the attacker initiates a GET request to the TLS server. They include their malicious certificate in the request. Since SICAM TOOLBOX II does not properly verify the extended key usage attribute of the certificate, it accepts the attacker’s certificate, opening up the system to potential exploits.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.
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