CVE-2020-11021 Explained : Impact and Mitigation

Actions Http-Client (NPM @actions/http-client) before version 1.0.8 can disclose Authorization headers to an incorrect domain in certain redirect scenarios. Learn about the impact, technical details, and mitigation steps.

Understanding CVE-2020-11021

Actions Http-Client vulnerability exposing Authorization headers.

What is CVE-2020-11021?

Actions Http-Client pre-1.0.8 version exposes Authorization headers in specific redirect scenarios, potentially leading to unauthorized access.

The Impact of CVE-2020-11021

CVSS Score: 6.3 (Medium)
Confidentiality Impact: High
Attack Vector: Network
Attack Complexity: High
Scope: Changed
Privileges Required: Low
Vector String: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

Technical Details of CVE-2020-11021

Actions Http-Client vulnerability specifics.

Vulnerability Description

Authorization headers exposed to incorrect domains during redirects.

Affected Systems and Versions

Product: http-client
Vendor: actions
Versions Affected: < 1.0.8

Exploitation Mechanism

HTTP requests with authorization headers leading to redirects to different domains.

Mitigation and Prevention

Protecting systems from CVE-2020-11021.

Immediate Steps to Take

Upgrade to version 1.0.8 or higher.
Review and restrict authorization header usage.

Long-Term Security Practices

Regularly update software components.
Implement secure coding practices.
Monitor and restrict sensitive data transmission.

Patching and Updates

Apply patches promptly to address vulnerabilities.