CVE-2019-12276 Explained : Impact and Mitigation

GrandNode 4.40's LetsEncryptController.cs in the Controllers folder is vulnerable to Path Traversal, allowing unauthenticated remote attackers to access any files on the server.

Understanding CVE-2019-12276

This CVE involves a Path Traversal vulnerability in GrandNode 4.40 that enables attackers to retrieve arbitrary files on the web server.

What is CVE-2019-12276?

LetsEncryptController.cs in GrandNode 4.40 is susceptible to Path Traversal
Attackers can exploit this flaw via crafted HTTP requests to LetsEncrypt/Index?fileName=

The Impact of CVE-2019-12276

Remote unauthenticated attackers can access any files on the web server
Exploitation requires sending specially crafted HTTP requests

Technical Details of CVE-2019-12276

GrandNode 4.40's vulnerability details and affected systems.

Vulnerability Description

Path Traversal vulnerability in LetsEncryptController.cs
Allows attackers to retrieve arbitrary files on the server

Affected Systems and Versions

Product: GrandNode 4.40
Vendor: GrandNode
Version: n/a

Exploitation Mechanism

Attackers send crafted HTTP requests to LetsEncrypt/Index?fileName=

Mitigation and Prevention

Steps to address and prevent CVE-2019-12276.

Immediate Steps to Take

Apply the patch released on 2019-05-30 for GrandNode 4.40

Long-Term Security Practices

Regularly update and patch software to prevent vulnerabilities
Implement access controls and authentication mechanisms
Monitor and restrict HTTP requests to sensitive endpoints

Patching and Updates

Ensure timely installation of security patches and updates