CVE-2021-23357 : Vulnerability Insights and Analysis

A directory traversal vulnerability has been identified in all versions of the package github.com/tyktechnologies/tyk/gateway. This CVE allows an attacker to delete arbitrary JSON files on the disk using the management API, potentially leading to unauthorized access and data compromise.

Understanding CVE-2021-23357

This section delves into the details of the vulnerability, its impacts, technical aspects, and mitigation techniques.

What is CVE-2021-23357?

The vulnerability arises from a directory traversal flaw in the handleAddOrUpdateApi function, enabling the unauthorized deletion and recreation of JSON files on the disk where the affected software is installed.

The Impact of CVE-2021-23357

With a CVSS base score of 3.3 (Low severity), the vulnerability poses a risk of data deletion and potential compromise. An attacker could leverage this flaw to manipulate crucial JSON files, leading to unauthorized access and data loss.

Technical Details of CVE-2021-23357

Explore the technical aspects of the directory traversal vulnerability in detail.

Vulnerability Description

The vulnerability allows attackers to delete arbitrary JSON files by exploiting the handleAddOrUpdateApi function, potentially compromising data integrity and availability.

Affected Systems and Versions

All versions of the package github.com/tyktechnologies/tyk/gateway are affected by this vulnerability, posing a potential risk to systems utilizing this software.

Exploitation Mechanism

Attackers can exploit this vulnerability by providing a manipulated APIID value that triggers the deletion and recreation of JSON files on the disk, exploiting the handleAddOrUpdateApi function.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-23357 and prevent potential exploitation.

Immediate Steps to Take

Immediately update the affected software to the latest version and monitor for any suspicious file modifications or unauthorized access attempts.

Long-Term Security Practices

Implement robust security measures, such as regular security audits, access controls, and secure coding practices to prevent similar vulnerabilities in the future.

Patching and Updates

Stay informed about security updates and patches released by the software vendor to address the vulnerability effectively.