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CVE-2025-25734: Unauthenticated EFI Shell Vulnerability in Kapsch TrafficCom RSUs

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Overview

Cybersecurity is a constant cat-and-mouse game, and the stakes are always high. Keeping pace with the latest vulnerabilities is essential in ensuring the security of both hardware and software systems. The recent discovery of a significant vulnerability, CVE-2025-25734, in Kapsch TrafficCom Roadside Units (RSUs) is a case in point. This vulnerability affects versions v3.2.0.829.23, v3.8.0.1119.42, and v4.6.0.1211.28 of these devices and carries a high severity rating due to its potential for system compromise and data leakage.

Vulnerability Summary

CVE ID: CVE-2025-25734
Severity: Critical (CVSS score 9.8)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise and potential data leakage

Affected Products

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Product | Affected Versions

Kapsch TrafficCom RIS-9160 | v3.2.0.829.23, v3.8.0.1119.42, v4.6.0.1211.28
Kapsch TrafficCom RIS-9260 | v3.2.0.829.23, v3.8.0.1119.42, v4.6.0.1211.28

How the Exploit Works

The vulnerability arises from an unauthenticated EFI shell present in the affected RSUs. EFI, or Extensible Firmware Interface, is a type of firmware interface that connects a computer’s operating system and its firmware. In this case, the unauthenticated EFI shell allows attackers to execute arbitrary code or escalate their privileges during the boot process of the RSUs. Given that no user interaction is required, an attacker can remotely compromise the system and potentially siphon off sensitive data.

Conceptual Example Code

Here’s a conceptual example of how the vulnerability might be exploited. This example represents a shell command that an attacker might use to exploit the unauthenticated EFI shell.

# Connect to the EFI shell
ssh root@target.example.com
# Once connected, execute arbitrary code
echo "malicious_code" > /boot/EFI/BOOTX64.EFI
# Reboot the system
reboot

In this example, ‘malicious_code’ represents arbitrary code that the attacker could inject into the EFI shell, potentially resulting in escalated privileges or other undesirable outcomes.
Remember, this is a conceptual example and may not represent an actual exploit. Always use such information responsibly, for the purpose of understanding and mitigating vulnerabilities.

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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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