CVE-2019-18839 : Exploit Details and Defense Strategies

FUDForum version 3.0.9 is vulnerable to a Stored XSS vulnerability that can lead to remote code execution, allowing attackers to gain control over the system.

Understanding CVE-2019-18839

FUDForum 3.0.9 contains a security weakness that enables Stored XSS through the nlogin parameter, potentially resulting in remote code execution.

What is CVE-2019-18839?

The vulnerability in FUDForum version 3.0.9 allows attackers to execute malicious code remotely by exploiting the nlogin parameter. This can lead to complete control over the system.

The Impact of CVE-2019-18839

Attackers can exploit a user account to gain full control over the system by sending a POST request.
Malicious payloads triggered through the user information panel can create PHP files within the web root and execute code on the remote server.

Technical Details of CVE-2019-18839

FUDForum version 3.0.9 is susceptible to a critical security vulnerability that allows for remote code execution.

Vulnerability Description

The vulnerability in FUDForum 3.0.9 enables Stored XSS through the nlogin parameter, potentially leading to remote code execution.

Affected Systems and Versions

Product: FUDForum
Vendor: N/A
Version: 3.0.9

Exploitation Mechanism

Attackers can exploit the vulnerability by sending a POST request and triggering a malicious payload through the user information panel.
This exploitation can result in the creation of PHP files within the web root and the execution of code on the remote server.

Mitigation and Prevention

Taking immediate steps and implementing long-term security practices are crucial to mitigate the risks associated with CVE-2019-18839.

Immediate Steps to Take

Update FUDForum to a patched version that addresses the vulnerability.
Monitor and restrict user inputs to prevent malicious code execution.

Long-Term Security Practices

Regularly update and patch software to protect against known vulnerabilities.
Conduct security audits and penetration testing to identify and address potential weaknesses.

Patching and Updates

Apply security patches provided by FUDForum promptly to mitigate the vulnerability and enhance system security.