CVE-2021-42017 : Vulnerability Insights and Analysis

A vulnerability has been identified in Siemens RUGGEDCOM devices that could allow attackers to eavesdrop on encrypted communications via a POODLE attack variant.

Understanding CVE-2021-42017

What is CVE-2021-42017?

A new variant of the POODLE attack has surfaced, posing a threat to RUGGEDCOM devices due to implementation flaws in the CBC encryption mode within TLS 1.0 to 1.2.

The Impact of CVE-2021-42017

If exploited, attackers could engage in man-in-the-middle attacks and intercept sensitive data during encrypted communications.

Technical Details of CVE-2021-42017

Vulnerability Description

The vulnerability arises from a third-party component vulnerability related to the CBC encryption mode in TLS 1.0 to 1.2.

Affected Systems and Versions

Various Siemens RUGGEDCOM devices are affected, including RUGGEDCOM i800, RUGGEDCOM RP110, and others.
Versions affected are below V4.3.8 for some devices and below V5.6.0 for others.

Exploitation Mechanism

Exploitation involves leveraging the POODLE attack variant to exploit the CBC encryption mode vulnerabilities and intercept encrypted communications.

Mitigation and Prevention

Immediate Steps to Take

Update affected devices to versions above V4.3.8 or V5.6.0, depending on the model.
Implement secure communication protocols to reduce the risk of interception.

Long-Term Security Practices

Conduct regular security assessments and audits of network devices.
Train staff on identifying and responding to potential security threats.

Patching and Updates

Regularly check for security updates and patches from Siemens to address CVE-2021-42017.