CVE-2021-44647 : Vulnerability Insights and Analysis

CVE-2021-44647 is a vulnerability affecting Lua versions 5.4.3 and above, leading to a denial of service due to a type confusion issue in the funcnamefromcode function in ldebug.c.

Understanding CVE-2021-44647

This vulnerability impacts Lua versions 5.4.3 and higher, potentially resulting in a local denial of service due to a type confusion flaw in the funcnamefromcode function in ldebug.c.

What is CVE-2021-44647?

The vulnerability in Lua versions 5.4.3 and above can lead to a denial of service due to a SEGV caused by type confusion in the funcnamefromcode function in ldebug.c.

The Impact of CVE-2021-44647

Lua v5.4.3 and later versions are affected by a vulnerability that can result in a local denial of service, posing a risk to systems utilizing these vulnerable versions.

Technical Details of CVE-2021-44647

This section outlines the technical aspects of the CVE.

Vulnerability Description

The vulnerability arises from a type confusion issue in the funcnamefromcode function within the ldebug.c file, impacting Lua versions 5.4.3 and above.

Affected Systems and Versions

Vendor: N/A
Product: N/A
Affected Versions: N/A (All versions impacted)

Exploitation Mechanism

The vulnerability can be exploited locally to trigger a denial of service by leveraging the type confusion issue in the funcnamefromcode function of Lua versions 5.4.3 and higher.

Mitigation and Prevention

Protecting systems from CVE-2021-44647 involves immediate actions and long-term security practices.

Immediate Steps to Take

Update Lua to a patched version provided by the official Lua website.
Monitor security advisories for any patches or workarounds.
Implement strict code review processes to catch potential vulnerabilities.

Long-Term Security Practices

Regularly update software components to stay protected against known vulnerabilities.
Conduct security training for developers to enhance awareness of secure coding practices.

Patching and Updates

Apply patches and updates promptly from the official Lua website to address the CVE-2021-44647 vulnerability.