Check Point Advisories

Codesys Control Buffer Overflow (CVE-2019-18858)

Vulnerability
Protection

Check Point Reference:	CPAI-2019-1783
Date Published:	25 Feb 2020
Severity:	Critical
Last Updated:	Tuesday 25 February, 2020
Source:
Industry Reference:	CVE-2019-18858
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Smart Software Solutions CoDeSys Control for BeagleBone prior to V3.5.15.20 Smart Software Solutions CoDeSys Control for empPC-A/iMX6 prior to V3.5.15.20 Smart Software Solutions CoDeSys Control for IOT2000 prior to V3.5.15.20 Smart Software Solutions CoDeSys Control for PFC100 prior to V3.5.15.20 Smart Software Solutions CoDeSys Control for PFC200 prior to V3.5.15.20 Smart Software Solutions CoDeSys Control for PLCnext prior to V3.5.15.20 Smart Software Solutions CoDeSys Control for Raspberry Pi prior to V3.5.15.20 Smart Software Solutions CoDeSys Control RTE V3 prior to V3.5.15.20 Smart Software Solutions CoDeSys Control RTE V3 (for Beckhoff CX) prior to V3.5.15.20 Smart Software Solutions CoDeSys Control V3 Runtime System Tookit prior to V3.5.15.20 Smart Software Solutions CoDeSys Control Win V3 (also part of the CODESYS Development System Setup) prior to V3.5.15.20 Smart Software Solutions CoDeSys HMI V3 prior to V3.5.15.20 Smart Software Solutions CoDeSys V3 Embedded Target Visu Toolkit prior to V3.5.15.20 Smart Software Solutions CoDeSys V3 Remote Target Visu Toolkit prior to V3.5.15.20
Vulnerability Description	A heap-based buffer overflow vulnerability exists in CoDeSys V3. The vulnerability is due to improper validation of user-supplied data sent to the CODESYS V3 web server URL endpoint. A remote unauthenticated attacker could exploit this vulnerability by sending a crafted request to the server. Successful exploitation could result in code execution in the context of the server process.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R80 / R77 / R75

In the IPS tab, click Protections and find the Codesys Control Buffer Overflow (CVE-2019-18858) protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Web Server Enforcement Violation.
Attack Information: Codesys Control Buffer Overflow (CVE-2019-18858)