CVE-2017-6017 : Vulnerability Insights and Analysis

A Resource Exhaustion vulnerability was detected in Schneider Electric Modicon M340 PLC models, potentially allowing an attacker to render the device unresponsive.

Understanding CVE-2017-6017

What is CVE-2017-6017?

CVE-2017-6017 is a Resource Exhaustion vulnerability found in Schneider Electric Modicon M340 PLC models, which could be exploited by a remote attacker to disrupt the device's operation.

The Impact of CVE-2017-6017

The vulnerability could lead to the PLC becoming unresponsive, requiring manual intervention to restore normal operation.

Technical Details of CVE-2017-6017

Vulnerability Description

A specially crafted series of packets sent to the PLC could cause it to freeze, necessitating a manual reset by the operator.

Affected Systems and Versions

Schneider Electric Modicon M340 PLC models BMXNOC0401, BMXNOE0100, BMXNOE0110, BMXNOE0110H, BMXNOR0200H, BMXP341000, BMXP342000, BMXP3420102, BMXP3420102CL, BMXP342020, BMXP342020H, BMXP342030, BMXP3420302, BMXP3420302H, and BMXP342030H

Exploitation Mechanism

An attacker with remote access could send a specifically crafted series of packets to the PLC, causing it to become unresponsive.

Mitigation and Prevention

Immediate Steps to Take

Apply vendor-provided patches or updates promptly
Implement network segmentation to limit exposure
Monitor network traffic for any suspicious activity

Long-Term Security Practices

Regularly update and patch all PLC devices
Conduct security assessments and penetration testing

Patching and Updates

Schneider Electric may have released patches or updates to address this vulnerability