CVE-2022-27813 : Security Advisory and Response

A vulnerability has been identified in Motorola MTM5000 series firmwares, potentially allowing an attacker to execute code on one core by exploiting unconfigured memory protection modules shared between ARM and DSP cores.

Understanding CVE-2022-27813

This CVE involves unconfigured memory protection modules in the Motorola MTM5000 series, posing a significant security risk.

What is CVE-2022-27813?

Motorola MTM5000 series firmwares lack properly configured memory protection of pages shared between the OMAP-L138 ARM and DSP cores. This oversight enables an attacker to gain code execution on one core by overwriting code in shared RAM or DDR2 memory regions.

The Impact of CVE-2022-27813

The vulnerable configuration allows an adversary with control over either core to exploit the lack of memory protection, potentially resulting in unauthorized code execution and compromising the integrity of the system.

Technical Details of CVE-2022-27813

This section delves into the specifics of the vulnerability, affected systems, and the exploitation mechanism.

Vulnerability Description

The unconfigured memory protection units (MPU1 and MPU2) in the Motorola MTM5000 series firmwares fail to enforce the trust boundary between ARM and DSP cores, enabling unauthorized code execution.

Affected Systems and Versions

The vulnerability affects the Motorola MTM5000 series, particularly the 'MTM5000' version. Systems running these firmwares are at risk of exploitation.

Exploitation Mechanism

By manipulating shared RAM or DDR2 memory regions due to the lack of configured memory protection units, an attacker can execute arbitrary code on one core with control over the other.

Mitigation and Prevention

Protecting against CVE-2022-27813 requires immediate action and long-term security measures.

Immediate Steps to Take

Apply patches or updates released by Motorola to address the memory protection misconfiguration.
Implement network segmentation to restrict access to vulnerable systems and reduce the attack surface.

Long-Term Security Practices

Regularly monitor for security advisories and updates from Motorola to stay informed about potential vulnerabilities.
Conduct routine security assessments and audits to identify and remediate any security gaps in the system.

Patching and Updates

Motorola is expected to release patches or updates to mitigate the unconfigured memory protection vulnerability in the MTM5000 series. Users are advised to apply these patches promptly to enhance system security.