CVE-2021-3223 : Security Advisory and Response

Node-RED-Dashboard before 2.26.2 is affected by a directory traversal vulnerability that allows an attacker to read files by exploiting the 'ui_base/js/..%2f' path traversal.

Understanding CVE-2021-3223

This CVE entry highlights a security flaw in Node-RED-Dashboard versions prior to 2.26.2 that enables unauthorized access to files on the system.

What is CVE-2021-3223?

The vulnerability in Node-RED-Dashboard allows an attacker to traverse directories and potentially view sensitive files using a crafted path.

The Impact of CVE-2021-3223

Exploiting this vulnerability could lead to unauthorized disclosure of information and compromise the confidentiality of data stored on the system.

Technical Details of CVE-2021-3223

The following details shed light on the technical aspects of CVE-2021-3223:

Vulnerability Description

Node-RED-Dashboard before version 2.26.2 is susceptible to directory traversal, allowing an attacker to read files by manipulating the directory traversal sequence.

Affected Systems and Versions

All versions of Node-RED-Dashboard before 2.26.2 are impacted by this vulnerability.

Exploitation Mechanism

By exploiting the 'ui_base/js/..%2f' directory traversal, an attacker can access files that are not intended to be publicly available.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-3223, consider the following security measures:

Immediate Steps to Take

Update Node-RED-Dashboard to version 2.26.2 or later to eliminate the vulnerability.
Restrict access to the affected directories to prevent unauthorized access.

Long-Term Security Practices

Regularly monitor for security advisories and updates from Node-RED-Dashboard.
Implement access controls and restrictions based on the principle of least privilege.
Conduct security assessments to identify and address vulnerabilities proactively.

Patching and Updates

Ensure timely application of security patches and updates provided by Node-RED-Dashboard to address known vulnerabilities and enhance system security.