CVE-2021-38384 : Exploit Details and Defense Strategies

Serverless Offline 8.0.0 returns a 403 HTTP status code for a route that has a trailing / character, potentially leading to incorrect access control implementation. This can result in unauthorized access due to an unexpected behavior discrepancy.

Understanding CVE-2021-38384

This section delves into the details of CVE-2021-38384.

What is CVE-2021-38384?

CVE-2021-38384 highlights a vulnerability in Serverless Offline 8.0.0 where a 403 HTTP status code is returned instead of the expected 200 status code for routes with a trailing / character.

The Impact of CVE-2021-38384

The vulnerability can mislead developers into implementing incorrect access control measures, potentially granting unauthorized users greater permissions than intended.

Technical Details of CVE-2021-38384

Let's explore the technical aspects associated with CVE-2021-38384.

Vulnerability Description

Serverless Offline 8.0.0 misreports HTTP status codes, leading to potential security loopholes in access control mechanisms.

Affected Systems and Versions

All instances running Serverless Offline 8.0.0 are affected by this misconfiguration.

Exploitation Mechanism

By abusing the incorrect HTTP status code returned, attackers can exploit the access control misconfiguration to gain unauthorized access.

Mitigation and Prevention

Discover how to address and prevent vulnerabilities related to CVE-2021-38384.

Immediate Steps to Take

Developers should validate access control mechanisms by testing routes with trailing / characters to ensure correct HTTP status code responses.

Long-Term Security Practices

Regularly monitor and update access control configurations to mitigate the risk of unauthorized access.

Patching and Updates

Ensure that Serverless Offline is updated to a version that correctly reports HTTP status codes to prevent unauthorized access.