CVE-2022-1201 Explained : Impact and Mitigation

A NULL Pointer Dereference vulnerability in mrb_vm_exec with super in GitHub repository mruby/mruby prior to version 3.2 can lead to the mruby interpreter crashing, impacting system availability.

Understanding CVE-2022-1201

This CVE involves a vulnerability in mruby/mruby that can result in a NULL Pointer Dereference in certain scenarios.

What is CVE-2022-1201?

The CVE-2022-1201 vulnerability relates to a NULL Pointer Dereference in mrb_vm_exec with super in the mruby/mruby GitHub repository before version 3.2. This flaw has the potential to crash the mruby interpreter, affecting the availability of the system.

The Impact of CVE-2022-1201

The impact of this vulnerability is rated as HIGH, with a base score of 7.1. It has a LOW attack complexity and requires no privileges, but can significantly disrupt system availability.

Technical Details of CVE-2022-1201

This section covers specific technical details of the CVE.

Vulnerability Description

The vulnerability involves a NULL Pointer Dereference in mrb_vm_exec with super in the mruby/mruby repository, affecting versions prior to 3.2.

Affected Systems and Versions

Systems using mruby/mruby versions less than 3.2 are susceptible to this vulnerability.

Exploitation Mechanism

The exploitation requires local access and does not need any special privileges, making it easier for attackers to crash the mruby interpreter.

Mitigation and Prevention

To prevent exploitation and mitigate the risks associated with CVE-2022-1201, certain measures need to be implemented.

Immediate Steps to Take

Update mruby/mruby to version 3.2 or higher to patch the vulnerability.
Monitor official sources for patches or security advisories related to this issue.

Long-Term Security Practices

Regularly update software and dependencies to stay protected against known vulnerabilities.
Implement secure coding practices to minimize the risk of NULL Pointer Dereference.

Patching and Updates

Stay informed about security updates from mruby and apply them promptly to ensure ongoing protection against potential threats.