Description
An unauthenticated remote attacker could exploit the used, insecure TLS 1.0 and TLS 1.1 protocols to intercept and manipulate encrypted communications between the Com-Server and connected systems.
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2025-12562
1. Vulnerability Assessment and Severity Evaluation
The vulnerability described in EUVD-2025-12562 pertains to the use of insecure TLS 1.0 and TLS 1.1 protocols in the Com-Server products. These outdated protocols are susceptible to various cryptographic attacks, allowing an unauthenticated remote attacker to intercept and manipulate encrypted communications. The CVSS (Common Vulnerability Scoring System) base score of 9.1 indicates a critical severity level. The scoring vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N highlights the following:
- Attack Vector (AV): Network (N) - The vulnerability is exploitable over the network.
- Attack Complexity (AC): Low (L) - The attack requires minimal skill and resources.
- Privileges Required (PR): None (N) - No authentication is required to exploit the vulnerability.
- User Interaction (UI): None (N) - No user interaction is required.
- Scope (S): Unchanged (U) - The vulnerability does not change the security scope.
- Confidentiality (C): High (H) - There is a high impact on the confidentiality of the data.
- Integrity (I): High (H) - There is a high impact on the integrity of the data.
- Availability (A): None (N) - There is no impact on the availability of the system.
2. Potential Attack Vectors and Exploitation Methods
The primary attack vectors include:
- Man-in-the-Middle (MitM) Attacks: An attacker can intercept and decrypt TLS 1.0 and TLS 1.1 communications, allowing them to read and modify the data.
- Downgrade Attacks: An attacker can force the use of weaker protocols (TLS 1.0 or TLS 1.1) even if stronger protocols are available.
- Cryptographic Attacks: Known vulnerabilities in TLS 1.0 and TLS 1.1, such as BEAST and POODLE, can be exploited to compromise the encryption.
3. Affected Systems and Software Versions
The vulnerability affects multiple Com-Server products from the vendor Wiesemann & Theis. The affected versions are:
- Com-Server UL: Versions 0.0.0 < 1.60
- Com-Server PoE 3x Isolated: Versions 0.0.0 < 1.60
- Com-Server OEM: Versions 0.0.0 < 1.60
- Com-Server++: Versions 0.0.0 < 1.60
- Com-Server 20mA: Versions 0.0.0 < 1.60
4. Recommended Mitigation Strategies
To mitigate this vulnerability, the following actions are recommended:
- Upgrade to TLS 1.2 or Higher: Ensure that all Com-Server products are configured to use TLS 1.2 or higher. This may require updating the firmware or software to the latest versions.
- Disable TLS 1.0 and TLS 1.1: Explicitly disable the use of TLS 1.0 and TLS 1.1 in the configuration settings of the affected systems.
- Network Segmentation: Implement network segmentation to limit the exposure of vulnerable systems.
- Monitoring and Logging: Enhance monitoring and logging to detect any suspicious activities or attempts to exploit the vulnerability.
- Regular Security Audits: Conduct regular security audits and vulnerability assessments to identify and address similar issues proactively.
5. Impact on European Cybersecurity Landscape
The vulnerability poses a significant risk to the European cybersecurity landscape, particularly in sectors that rely heavily on secure communications, such as finance, healthcare, and critical infrastructure. The use of outdated TLS protocols can lead to data breaches, loss of sensitive information, and potential disruptions in services. Organizations must prioritize updating their systems to comply with modern security standards to protect against such vulnerabilities.
6. Technical Details for Security Professionals
- Detection: Use network traffic analysis tools to detect the use of TLS 1.0 and TLS 1.1. Tools like Wireshark can help identify the protocol versions in use.
- Configuration: Ensure that the configuration files for Com-Server products are updated to support only TLS 1.2 or higher. This may involve modifying SSL/TLS settings in the server configuration.
- Patch Management: Implement a robust patch management process to ensure that all systems are updated to the latest versions that support secure protocols.
- Incident Response: Develop an incident response plan that includes steps for identifying, containing, and remediating any exploitation of this vulnerability.
Conclusion
The vulnerability described in EUVD-2025-12562 is critical and requires immediate attention. Organizations using the affected Com-Server products should prioritize upgrading to TLS 1.2 or higher and disable the use of TLS 1.0 and TLS 1.1. Proactive measures, including regular security audits and network monitoring, are essential to mitigate the risk and protect against potential attacks.
References
This analysis provides a comprehensive overview for cybersecurity professionals to understand the vulnerability, its impact, and the necessary steps to mitigate the risk effectively.