CVE-2022-26943 : Security Advisory and Response

The Motorola MTM5000 series firmware is vulnerable to CVE-2022-26943 due to the use of a weak PRNG entropy source for authentication challenge generation, rendering the unit susceptible to two specific types of attacks.

Understanding CVE-2022-26943

This CVE identifier highlights the vulnerability in the authentication challenge generation process in Motorola MTM5000 devices.

What is CVE-2022-26943?

The Motorola MTM5000 series firmware generates TETRA authentication challenges using a PRNG that relies on a tick count register as its only source of entropy. However, this limited entropy source exposes the authentication challenge to potential attacks.

The Impact of CVE-2022-26943

The vulnerability allows attackers to potentially derive the contents of the entropy pool and predict authentication challenges, compromising the security of the device.

Technical Details of CVE-2022-26943

The following technical aspects shed light on the specifics of this CVE.

Vulnerability Description

The weakness lies in the PRNG used for authentication challenge generation in Motorola MTM5000 devices, leaving them open to exploitation.

Affected Systems and Versions

The affected system is the Motorola MTM5000 series, specifically version MTM5000.

Exploitation Mechanism

Attackers can exploit the weak PRNG entropy source to derive the entropy pool contents and predict authentication challenges.

Mitigation and Prevention

Protecting against CVE-2022-26943 requires immediate action and long-term security measures.

Immediate Steps to Take

Immediate steps include updating the firmware, implementing secure PRNG mechanisms, and monitoring authentication challenge generation.

Long-Term Security Practices

In the long term, organizations should prioritize regular security audits, continuous monitoring, and proactive vulnerability management.

Patching and Updates

Motorola should release patches and updates to address the weakness in the authentication challenge generation process.