CVE-2019-15606 Explained : Impact and Mitigation

Node.js versions 10, 12, and 13 are susceptible to a vulnerability that allows bypassing authorization based on header value comparisons when trailing white space is included in HTTP header values.

Understanding CVE-2019-15606

This CVE identifies a security issue in Node.js versions 10, 12, and 13 related to improper input validation.

What is CVE-2019-15606?

CVE-2019-15606 is a vulnerability in Node.js that enables attackers to bypass authorization mechanisms by exploiting trailing white space in HTTP header values.

The Impact of CVE-2019-15606

The vulnerability can lead to unauthorized access to sensitive data and resources, compromising the security of affected systems.

Technical Details of CVE-2019-15606

Node.js versions 10, 12, and 13 are affected by this vulnerability due to improper input validation.

Vulnerability Description

The issue arises from the improper handling of trailing white space in HTTP header values, allowing malicious actors to bypass authorization checks.

Affected Systems and Versions

Product: Node.js (https://github.com/nodejs/node)
Versions: 10.19.0, 12.15.0, 13.8.0

Exploitation Mechanism

Attackers can exploit the vulnerability by including trailing white space in HTTP header values to manipulate authorization checks.

Mitigation and Prevention

To address CVE-2019-15606, immediate actions and long-term security practices are recommended.

Immediate Steps to Take

Update Node.js to the latest patched version to mitigate the vulnerability.
Review and adjust authorization mechanisms to account for potential bypass techniques.

Long-Term Security Practices

Regularly monitor and audit HTTP header values for anomalies and unauthorized characters.
Implement strict input validation and sanitization practices to prevent similar bypass vulnerabilities.

Patching and Updates

Apply security patches provided by Node.js to fix the vulnerability and enhance system security.