CVE-2019-6553 : Security Advisory and Response

A security flaw was discovered in Rockwell Automation RSLinx Classic versions 4.10.00 and earlier, allowing for a potential stack-based buffer overflow exploit.

Understanding CVE-2019-6553

This CVE involves a vulnerability in RSLinx Classic that could be exploited by attackers.

What is CVE-2019-6553?

The vulnerability in RSLinx Classic versions 4.10.00 and prior allows attackers to potentially trigger a stack-based buffer overflow by manipulating data in a Forward Open service request.

The Impact of CVE-2019-6553

This vulnerability could be exploited by malicious actors to execute arbitrary code or crash the application, leading to a denial of service condition.

Technical Details of CVE-2019-6553

This section provides more technical insights into the CVE.

Vulnerability Description

The flaw involves an input validation issue within a .dll file of RSLinx Classic, where data in a Forward Open service request is transmitted to a buffer with a fixed size, enabling a stack-based buffer overflow.

Affected Systems and Versions

Product: RSLinx Classic
Vendor: Rockwell Automation
Versions Affected: 4.10.00 and prior

Exploitation Mechanism

The vulnerability allows attackers to exploit a stack-based buffer overflow by manipulating data in a Forward Open service request.

Mitigation and Prevention

Protecting systems from CVE-2019-6553 is crucial to maintaining security.

Immediate Steps to Take

Apply security patches provided by Rockwell Automation promptly.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update and patch software to address known vulnerabilities.
Conduct security assessments and penetration testing to identify and mitigate risks.
Educate users and IT staff on best practices for cybersecurity.

Patching and Updates

Ensure that all systems running RSLinx Classic are updated with the latest patches and security fixes.