CVE-2023-41338 : Security Advisory and Response

A vulnerability has been discovered in Ctx.IsFromLocal() in gofiber, impacting versions prior to 2.49.2. This vulnerability could allow unauthorized access to resources intended only for localhost, posing a medium-severity risk.

Understanding CVE-2023-41338

This section provides detailed insights into the nature and impact of the CVE-2023-41338 vulnerability.

What is CVE-2023-41338?

The vulnerability affects users of the gofiber project who rely on the

ctx.IsFromLocal

method to restrict access to localhost requests. By setting

X-Forwarded-For: 127.0.0.1

in a request from a foreign host, unauthorized access can be gained to resources.

The Impact of CVE-2023-41338

The exploitation of this vulnerability could lead to unauthorized access to resources limited to the affected process. This could potentially compromise the security of the system and data.

Technical Details of CVE-2023-41338

Explore the technical aspects of the CVE-2023-41338 vulnerability to understand how it can be exploited.

Vulnerability Description

Versions prior to 2.49.2 of gofiber fail to properly restrict access to localhost when utilizing the

ctx.IsFromLocal

method, allowing unauthorized access to localhost resources.

Affected Systems and Versions

Vendor: gofiber
Product: fiber
Affected Versions: < 2.49.2

Exploitation Mechanism

By including

X-Forwarded-For: 127.0.0.1

in a request originating from a foreign host, unauthorized access to localhost resources can be granted, potentially escalating the severity of the attack.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2023-41338 and implement preventive measures.

Immediate Steps to Take

Users are strongly advised to upgrade to version 2.49.2 that contains the necessary patch. There are no known workarounds to address this vulnerability effectively.

Long-Term Security Practices

Ensure timely software updates and patches to prevent potential security risks. Regularly monitor and review access control mechanisms to enhance system security.

Patching and Updates

Stay informed about security advisories and updates from gofiber to address vulnerabilities promptly and enhance the security posture of your systems.