CVE-2020-27483 : Security Advisory and Response

Garmin Forerunner 235 before 8.20 is affected by an array index error in the ConnectIQ TVM component, allowing for possible remote code execution.

Understanding CVE-2020-27483

This CVE involves an array index error in Garmin Forerunner 235's ConnectIQ TVM component, potentially leading to remote code execution.

What is CVE-2020-27483?

The vulnerability in Garmin Forerunner 235 before version 8.20 allows an attacker to upload a malicious ConnectIQ application to the ConnectIQ store, exploiting an unchecked offset in the ConnectIQ program interpreter.

The Impact of CVE-2020-27483

Exploiting this vulnerability could enable an attacker to leak runtime information and potentially execute remote code by manipulating TVM objects on the stack.

Technical Details of CVE-2020-27483

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability arises from an array index error in the ConnectIQ TVM component of Garmin Forerunner 235, allowing unauthorized access and potential code execution.

Affected Systems and Versions

Affected Product: Garmin Forerunner 235
Vulnerable Version: Before 8.20

Exploitation Mechanism

Attacker uploads a malicious ConnectIQ application to the ConnectIQ store
Exploits an unchecked offset in the ConnectIQ program interpreter
Allows manipulation of TVM objects on the stack for potential remote code execution

Mitigation and Prevention

Protecting systems from CVE-2020-27483 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Garmin Forerunner 235 to version 8.20 or later
Avoid downloading or installing untrusted ConnectIQ applications

Long-Term Security Practices

Regularly update firmware and software to patch known vulnerabilities
Implement secure coding practices to prevent similar exploits

Patching and Updates

Apply patches and updates provided by Garmin to address the array index error and enhance system security