CVE-2022-47549 : Exploit Details and Defense Strategies

An unprotected memory-access operation in optee_os in TrustedFirmware Open Portable Trusted Execution Environment (OP-TEE) before 3.20 allows a physically proximate adversary to bypass signature verification and install malicious trusted applications via electromagnetic fault injections.

Understanding CVE-2022-47549

This section provides insights into the impact, technical details, and mitigation strategies related to CVE-2022-47549.

What is CVE-2022-47549?

CVE-2022-47549 involves an unprotected memory-access operation in optee_os that enables a physically proximate attacker to bypass signature verification and deploy malicious trusted applications using electromagnetic fault injections.

The Impact of CVE-2022-47549

The vulnerability poses a serious threat as it allows unauthorized installation of malicious trusted applications, compromising the integrity of the system and potentially leading to further exploitation by threat actors.

Technical Details of CVE-2022-47549

Let's delve into the specifics of the vulnerability, including the description, affected systems and versions, and exploitation mechanism.

Vulnerability Description

The vulnerability in optee_os prior to version 3.20 permits an adversary in close physical proximity to execute unauthorized operations, bypassing signature verification and injecting malicious trusted applications via electromagnetic fault injections.

Affected Systems and Versions

The vulnerability affects TrustedFirmware Open Portable Trusted Execution Environment (OP-TEE) versions before 3.20, leaving them susceptible to signature verification bypass and unauthorized application installations through electromagnetic fault injections.

Exploitation Mechanism

By exploiting the unprotected memory-access operation in optee_os, threat actors can perform electromagnetic fault injections to bypass signature verification and execute the installation of malicious trusted applications, significantly undermining system security.

Mitigation and Prevention

Protecting systems from CVE-2022-47549 requires immediate action and the implementation of robust security measures.

Immediate Steps to Take

Ensure physical security measures to prevent unauthorized access to devices and closely monitor for any signs of electromagnetic fault injections or suspicious activities in proximity to sensitive systems.

Long-Term Security Practices

Establishing comprehensive security protocols, such as regular security assessments, security training for staff, and implementing secure coding practices, can enhance overall system resilience against such vulnerabilities.

Patching and Updates

It is critical to apply the latest patches and updates provided by TrustFirmware Open Portable Trusted Execution Environment (OP-TEE) to address the vulnerability and strengthen defenses against electromagnetic fault injection attacks.