CVE-2018-18068 : Security Advisory and Response

The Raspberry Pi 3 module B+ and potentially other devices are affected by a vulnerability that allows non-secure code to access and modify memory/registers at the highest privilege level in ARMv8.

Understanding CVE-2018-18068

This CVE involves a security issue related to ARM-based hardware debugging capabilities on the Raspberry Pi 3 module B+.

What is CVE-2018-18068?

The vulnerability allows a debug host processor running in non-secure EL1 to gain complete control over another processor, suspending it and elevating its privilege level to any desired setting. This enables unauthorized access to and modification of memory/registers at the highest privilege level (EL3) in ARMv8.

The Impact of CVE-2018-18068

The exploit grants the attacker the ability to execute arbitrary code within the EL3 setting, potentially leading to unauthorized system access and control.

Technical Details of CVE-2018-18068

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The vulnerability allows a debug host processor to manipulate memory/registers at the highest privilege level (EL3) via inter-processor debugging, compromising system security.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions: Not applicable

Exploitation Mechanism

Non-secure EL1 code can access and modify EL3 memory/registers via inter-processor debugging.
Debug host processor can suspend and control another processor, elevating its privilege level.

Mitigation and Prevention

Protecting systems from CVE-2018-18068 requires immediate actions and long-term security practices.

Immediate Steps to Take

Disable ARM-based hardware debugging if not essential.
Implement strict access controls and privilege separation mechanisms.
Regularly monitor and audit system activities for suspicious behavior.

Long-Term Security Practices

Keep systems and software up to date with the latest security patches.
Conduct regular security assessments and penetration testing to identify vulnerabilities.

Patching and Updates

Apply relevant security patches provided by the device manufacturer or software vendor to address the vulnerability.