CVE-2019-11574 : Exploit Details and Defense Strategies

A vulnerability was found in Simple Machines Forum (SMF) prior to version 2.0.17, involving Server-Side Request Forgery (SSRF) connected to Subs-Package.php and Subs.php files, due to the direct use of user-provided data in curl requests.

Understanding CVE-2019-11574

This CVE identifies a security flaw in Simple Machines Forum (SMF) that could be exploited through SSRF.

What is CVE-2019-11574?

CVE-2019-11574 is a vulnerability in SMF versions before 2.0.17 that allows SSRF attacks by utilizing user-supplied data in curl requests.

The Impact of CVE-2019-11574

The vulnerability could lead to unauthorized access to internal systems, data leakage, and potential server compromise.

Technical Details of CVE-2019-11574

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The issue stems from SMF versions prior to 2.0.17, where SSRF vulnerabilities exist in Subs-Package.php and Subs.php due to direct usage of user-provided data in curl calls.

Affected Systems and Versions

Product: Simple Machines Forum (SMF)
Vendor: N/A
Versions affected: All versions before 2.0.17

Exploitation Mechanism

The vulnerability is exploited by injecting malicious data into curl requests, allowing attackers to manipulate server-side requests and potentially access sensitive information.

Mitigation and Prevention

Protecting systems from CVE-2019-11574 requires immediate actions and long-term security measures.

Immediate Steps to Take

Upgrade SMF to version 2.0.17 or later to mitigate the SSRF vulnerability.
Monitor and restrict user input that is directly used in curl requests.

Long-Term Security Practices

Implement input validation and sanitization to prevent SSRF attacks.
Regularly update and patch SMF to address security vulnerabilities.

Patching and Updates

Apply patches and updates provided by Simple Machines Forum to fix the SSRF vulnerability and enhance overall system security.