CVE-2017-7924 : Exploit Details and Defense Strategies
Learn about CVE-2017-7924, a vulnerability in Rockwell Automation MicroLogix 1100 controllers that allows remote attackers to trigger a Denial of Service (DoS) condition by sending malicious packets.
A vulnerability related to incorrect input validation in Rockwell Automation MicroLogix 1100 controllers could lead to a Denial of Service (DoS) state when exploited by a remote attacker.
Understanding CVE-2017-7924
This CVE involves a specific vulnerability in Rockwell Automation MicroLogix 1100 controllers that can be triggered by sending a specially crafted packet to the controller without authentication.
What is CVE-2017-7924?
The vulnerability in Rockwell Automation MicroLogix 1100 controllers allows remote attackers to cause a Denial of Service (DoS) condition by sending malicious Programmable Controller Communication Commands (PCCC) packets.
The Impact of CVE-2017-7924
Exploiting this vulnerability can result in the affected controller entering a state of Denial of Service (DoS), disrupting its normal operation and potentially causing downtime for the system.
Technical Details of CVE-2017-7924
This section provides more in-depth technical details about the vulnerability.
Vulnerability Description
The vulnerability stems from incorrect input validation in Rockwell Automation MicroLogix 1100 controllers, specifically models 1763-L16BWA, 1763-L16AWA, 1763-L16BBB, and 1763-L16DWD. It allows remote attackers to trigger a Denial of Service (DoS) state by sending specially crafted PCCC packets.
Affected Systems and Versions
- Product: Rockwell Automation MicroLogix 1100 Controllers
- Versions: Rockwell Automation MicroLogix 1100 Controllers
Exploitation Mechanism
- Attackers send specially crafted PCCC packets to the controller without authentication
Mitigation and Prevention
Protecting systems from CVE-2017-7924 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Implement network segmentation to limit access to critical devices
- Apply firewall rules to restrict unauthorized access
- Monitor network traffic for any suspicious activities
Long-Term Security Practices
- Regularly update firmware and software patches
- Conduct security assessments and penetration testing
- Educate users on cybersecurity best practices
Patching and Updates
- Apply patches and updates provided by Rockwell Automation to address the vulnerability