CVE-2019-11066 Explained : Impact and Mitigation

LightOpenID SSRF Vulnerability

Understanding CVE-2019-11066

An SSRF vulnerability exists in LightOpenID up to version 1.3.1, allowing exploitation via specially crafted OpenID 2.0 assertion requests.

What is CVE-2019-11066?

The vulnerability in openid.php within LightOpenID enables SSRF attacks by manipulating OpenID 2.0 assertion requests using the HTTP GET method.

The Impact of CVE-2019-11066

This vulnerability could be exploited by attackers to perform Server-Side Request Forgery (SSRF) attacks, potentially leading to unauthorized access to internal systems or services.

Technical Details of CVE-2019-11066

Vulnerability Description

LightOpenID through version 1.3.1 is susceptible to SSRF attacks due to improper handling of crafted OpenID 2.0 assertion requests.

Affected Systems and Versions

Product: LightOpenID
Versions affected: up to 1.3.1

Exploitation Mechanism

Attackers can exploit this vulnerability by sending specially crafted OpenID 2.0 assertion requests using the HTTP GET method.

Mitigation and Prevention

Immediate Steps to Take

Update LightOpenID to version 1.3.2 or later to mitigate the SSRF vulnerability.
Implement strict input validation to prevent malicious input from being processed.

Long-Term Security Practices

Regularly monitor and audit network traffic for suspicious activities.
Educate users and developers about the risks of SSRF attacks and best practices for secure coding.

Patching and Updates

Stay informed about security updates and patches released by LightOpenID.