CVE-2021-23428 : Security Advisory and Response

This CVE-2021-23428 article provides details about a vulnerability affecting all versions of the elFinder.NetCore package, allowing path traversal via the Path.Combine(...) method due to missing input sanitation.

Understanding CVE-2021-23428

This section delves into the impact and technical aspects of the CVE-2021-23428 vulnerability.

What is CVE-2021-23428?

CVE-2021-23428 affects all versions of elFinder.NetCore, enabling attackers to escape the Files directory through path traversal.

The Impact of CVE-2021-23428

With a CVSS base score of 8.6 (High severity), this vulnerability poses a significant risk to confidentiality and integrity, despite requiring no user privileges for exploitation.

Technical Details of CVE-2021-23428

Explore the technical specifics of the CVE-2021-23428 vulnerability in this section.

Vulnerability Description

The vulnerability arises due to insufficient input sanitization in the Path.Combine(...) method, leading to the possibility of path traversal.

Affected Systems and Versions

All versions of elFinder.NetCore are impacted by this vulnerability.

Exploitation Mechanism

Attackers exploit this vulnerability by manipulating user input to navigate outside the intended Files directory.

Mitigation and Prevention

Discover the necessary steps and practices to mitigate the risks associated with CVE-2021-23428 in this section.

Immediate Steps to Take

Developers should implement input validation and proper path checking to prevent path traversal attacks.

Long-Term Security Practices

Regular code reviews, security testing, and user input validation are crucial for maintaining robust security practices.

Patching and Updates

Vendor patches and updates addressing the path traversal vulnerability in elFinder.NetCore should be promptly applied to secure systems.