CVE-2019-10952 : Vulnerability Insights and Analysis

A stack-based buffer overflow vulnerability in Rockwell Automation's CompactLogix 5370 controllers could lead to remote code execution and unresponsiveness of the web server.

Understanding CVE-2019-10952

This CVE involves a critical vulnerability affecting various controllers by Rockwell Automation.

What is CVE-2019-10952?

This vulnerability allows an attacker to exploit a stack-based buffer overflow by sending a crafted HTTP/HTTPS request, potentially leading to remote code execution and rendering the web server unresponsive.

The Impact of CVE-2019-10952

The vulnerability can result in the web server becoming unresponsive and experiencing remote code execution, requiring a cold restart for recovery.

Technical Details of CVE-2019-10952

This section provides detailed technical information about the vulnerability.

Vulnerability Description

An attacker could exploit a stack-based buffer overflow vulnerability by sending a purposefully created HTTP/HTTPS request, affecting CompactLogix 5370 L1, L2, and L3 Controllers, Compact GuardLogix 5370 controllers, and Armor Compact GuardLogix 5370 Controllers Versions 20 - 30 and earlier.

Affected Systems and Versions

CompactLogix 5370 L1 controllers
CompactLogix 5370 L2 controllers
CompactLogix 5370 L3 controllers
Compact GuardLogix 5370 controllers
Armor Compact GuardLogix 5370 controllers
Versions 20 - 30 and earlier

Exploitation Mechanism

The vulnerability is exploited by sending a crafted HTTP/HTTPS request, triggering a stack-based buffer overflow that can lead to remote code execution and web server unresponsiveness.

Mitigation and Prevention

Protecting systems from CVE-2019-10952 is crucial to prevent potential exploitation and security breaches.

Immediate Steps to Take

Apply the latest firmware version FRN 31.011 to mitigate the associated risk.
Block or restrict traffic to specific ports using network infrastructure controls.
Configure access control lists (ACL) to block/restrict ports for EtherNet/IP and web-based vulnerabilities.
Utilize firewalls to block unauthorized SMTP packets and ensure network security.
Refer to Rockwell Automation's Security Advisory for detailed instructions.

Long-Term Security Practices

Use trusted software, patches, and antivirus programs.
Minimize network exposure and restrict access to control system devices.
Implement secure remote access methods like VPNs.

Patching and Updates

Rockwell Automation recommends updating firmware to the latest version and following specific security measures to enhance system protection.