Facebook Google Plus Twitter LinkedIn YouTube RSS Menu Search Resource - BlogResource - WebinarResource - ReportResource - Eventicons_066 icons_067icons_068icons_069icons_070

[R1] 3S CODESYS PLCWinNT Runtime Service NULL Pointer Dereference Remote DoS

High

Synopsis

CODESYS Runtime, a runtime system that "turns any embedded or PC based device into a full-fledged IEC 61131-3 controller", is vulnerable to a remote denial of service attack. The issue is due to the PLCWinNT Runtime service that runs on TCP port 1200 not properly sanitizing user-supplied input. By sending a crafted request, a remote attacker can trigger a NULL pointer dereference, crashing the service. Without the service running, the functionality of the device is effectively gone. Tenable has created a working exploit that demonstrates the issue, but will not be releasing it.

Note that this Runtime system may be used in additional software.

Solution

Upgrade the PLCWinNT Runtime software to version 2.4.7.48, or upgrade to CODESYS 2.3.9.48 which includes the updated Runtime.

Disclosure Timeline

2015-08-01 - Issue discovered
2015-08-04 - ICS-CERT informed, asked to coordinate and assign CVE
2015-08-10 - Tenable pinged ICS-CERT
2015-08-10 - ICS-CERT reply, ICS-VU-607305 assigned
2015-08-26 - ICS-CERT requests PoC on behalf of vendor, PoC sent
2015-08-27 - ICS-CERT relays PoC to vendor
2015-09-08 - Tenable pinged ICS-CERT re: CVE assignment
2015-10-12 - ICS-CERT indicates S3 plans to post a fix on 2015-10-15. Provides draft advisory with CVE ID for review.
2015-10-12 - Provided feedback on draft advisory
2015-10-15 - Issue disclosed via ICS-CERT, Vendor advisory, Tenable advisory (go coordination!)

All information within TRA advisories is provided “as is”, without warranty of any kind, including the implied warranties of merchantability and fitness for a particular purpose, and with no guarantee of completeness, accuracy, or timeliness. Individuals and organizations are responsible for assessing the impact of any actual or potential security vulnerability.

Tenable takes product security very seriously. If you believe you have found a vulnerability in one of our products, we ask that you please work with us to quickly resolve it in order to protect customers. Tenable believes in responding quickly to such reports, maintaining communication with researchers, and providing a solution in short order.

For more details on submitting vulnerability information, please see our Vulnerability Reporting Guidelines page.

If you have questions or corrections about this advisory, please email [email protected]

Try for Free Buy Now

Try Tenable.io

FREE FOR 60 DAYS

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Sign up now and run your first scan within 60 seconds.

Buy Tenable.io

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Purchase your annual subscription today.

65 assets
Try for Free Buy Now

Try Nessus Professional Free

FREE FOR 7 DAYS

Nessus® is the most comprehensive vulnerability scanner on the market today. Nessus Professional will help automate the vulnerability scanning process, save time in your compliance cycles and allow you to engage your IT team.

Buy Nessus Professional

Nessus® is the most comprehensive vulnerability scanner on the market today. Nessus Professional will help automate the vulnerability scanning process, save time in your compliance cycles and allow you to engage your IT team.

Buy a multi-year license and save

Try for Free Buy Now

Try Tenable.io Web Application Scanning

FREE FOR 60 DAYS

Enjoy full access to our latest web application scanning offering designed for modern applications as part of the Tenable.io platform. Safely scan your entire online portfolio for vulnerabilities with a high degree of accuracy without heavy manual effort or disruption to critical web applications. Sign up now and run your first scan within 60 seconds.

Buy Tenable.io Web Application Scanning

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Purchase your annual subscription today.

5 FQDNs
Try for Free Contact Sales

Try Tenable.io Container Security

FREE FOR 60 DAYS

Enjoy full access to the only container security offering integrated into a vulnerability management platform. Monitor container images for vulnerabilities, malware and policy violations. Integrate with continuous integration and continuous deployment (CI/CD) systems to support DevOps practices, strengthen security and support enterprise policy compliance.

Buy Tenable.io Container Security

Tenable.io Container Security seamlessly and securely enables DevOps processes by providing visibility into the security of container images – including vulnerabilities, malware and policy violations – through integration with the build process.

Learn More about Industrial Security