CVE-2019-10669 : Exploit Details and Defense Strategies

A vulnerability has been found in LibreNMS version 1.47 that allows for command injection, potentially leading to the execution of malicious commands.

Understanding CVE-2019-10669

What is CVE-2019-10669?

An issue in LibreNMS version 1.47 allows attackers to inject malicious commands through improper filtering of user input parameters in the collectd.inc.php file.

The Impact of CVE-2019-10669

This vulnerability could be exploited by attackers to execute arbitrary commands on the affected system, leading to unauthorized access and potential system compromise.

Technical Details of CVE-2019-10669

Vulnerability Description

The vulnerability arises from inadequate sanitization of user-supplied parameters using the mysqli_escape_real_string function, enabling the injection of malicious commands into the $rrd_cmd variable.

Affected Systems and Versions

LibreNMS version 1.47

Exploitation Mechanism

The vulnerability allows an attacker to inject malicious commands into the $rrd_cmd variable, which is later executed through the passthru() function, potentially leading to command execution.

Mitigation and Prevention

Immediate Steps to Take

Update LibreNMS to a patched version that addresses the command injection vulnerability.
Implement strict input validation and sanitization mechanisms to prevent command injection attacks.

Long-Term Security Practices

Regularly monitor and audit code for security vulnerabilities.
Educate developers on secure coding practices to prevent similar vulnerabilities.

Patching and Updates

Apply security patches and updates provided by LibreNMS promptly to mitigate the risk of exploitation.