CVE-2020-11683 : Security Advisory and Response

A timing side channel vulnerability was found in AT91bootstrap before version 3.9.2, allowing attackers with physical access to manipulate CMAC values and execute arbitrary code on the affected system.

Understanding CVE-2020-11683

This CVE involves a timing side channel exploit in AT91bootstrap, potentially leading to unauthorized code execution.

What is CVE-2020-11683?

AT91bootstrap, prior to version 3.9.2, contains a vulnerability that enables attackers with physical proximity to tamper with CMAC values, facilitating the launch of malicious code on the compromised device.

The Impact of CVE-2020-11683

The exploitation of this vulnerability could result in unauthorized individuals executing arbitrary code on the affected system, posing a significant security risk.

Technical Details of CVE-2020-11683

This section delves into the specific technical aspects of the CVE.

Vulnerability Description

The vulnerability in AT91bootstrap allows threat actors with physical access to manipulate CMAC values, leading to the execution of unauthorized code on the system.

Affected Systems and Versions

Product: AT91bootstrap
Versions affected: Before 3.9.2

Exploitation Mechanism

Attackers can exploit the timing side channel in AT91bootstrap to forge CMAC values, enabling the booting of arbitrary code on the compromised system.

Mitigation and Prevention

Protecting systems from CVE-2020-11683 requires immediate actions and long-term security measures.

Immediate Steps to Take

Update AT91bootstrap to version 3.9.2 or later to mitigate the vulnerability.
Restrict physical access to devices to prevent unauthorized manipulation of CMAC values.

Long-Term Security Practices

Implement strict access controls and monitoring mechanisms to detect unauthorized activities.
Regularly review and update security protocols to address emerging threats.

Patching and Updates

Apply security patches promptly to address known vulnerabilities and enhance system security.