CVE-2019-12463 : Security Advisory and Response
Discover the impact of CVE-2019-12463 on LibreNMS 1.50.1. Learn about the vulnerability allowing RRDtool syntax injection, potential attacks, and mitigation steps.
A vulnerability was identified in LibreNMS 1.50.1, specifically in the scripts responsible for handling graphing options. These scripts do not adequately validate or encode certain user input fields, potentially leading to various attacks.
Understanding CVE-2019-12463
This CVE highlights a security issue in LibreNMS version 1.50.1, affecting the handling of graphing options.
What is CVE-2019-12463?
The vulnerability in LibreNMS 1.50.1 allows attackers to inject RRDtool syntax through specific scripts, potentially leading to directory disclosure, denial of service, or arbitrary file writing.
The Impact of CVE-2019-12463
Exploiting this vulnerability could result in severe consequences, including unauthorized access to sensitive information and disruption of services.
Technical Details of CVE-2019-12463
This section delves into the technical aspects of the CVE.
Vulnerability Description
The scripts responsible for graphing options in LibreNMS 1.50.1 lack proper validation and encoding of user input fields, enabling attackers to inject malicious RRDtool syntax.
Affected Systems and Versions
- Affected Version: LibreNMS 1.50.1
- Vendor: n/a
Exploitation Mechanism
- Attackers can inject RRDtool syntax through html/graph.php and html/graph-realtime.php scripts.
- RRDtool syntax versatility allows for various attacks like revealing directory structures, causing denial of service, or writing arbitrary files.
Mitigation and Prevention
Protecting systems from CVE-2019-12463 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply security patches or updates provided by LibreNMS promptly.
- Implement strict input validation mechanisms to prevent injection attacks.
Long-Term Security Practices
- Regularly monitor and audit user input handling in applications.
- Conduct security training for developers to enhance awareness of secure coding practices.
Patching and Updates
- Stay informed about security advisories from LibreNMS and apply patches as soon as they are released.