CVE-2019-5105
7.5 · HIGHAn exploitable memory corruption vulnerability exists in the Name Service Client functionality of 3S-Smart Software Solutions CODESYS GatewayService.
Overview
CVE-2019-5105 is a high-severity vulnerability. It was published on March 26, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical description
An exploitable memory corruption vulnerability exists in the Name Service Client functionality of 3S-Smart Software Solutions CODESYS GatewayService. A specially crafted packet can cause a large memcpy, resulting in an access violation and termination of the process. An attacker can send a packet to a device running the GatewayService.exe to trigger this vulnerability. All variants of the CODESYS V3 products in all versions prior V3.5.16.10 containing the CmpRouter or CmpRouterEmbedded component are affected, regardless of the CPU type or operating system: CODESYS Control for BeagleBone, CODESYS Control for emPC-A/iMX6, CODESYS Control for IOT2000, CODESYS Control for Linux, CODESYS Control for PLCnext, CODESYS Control for PFC100, CODESYS Control for PFC200, CODESYS Control for Raspberry Pi, CODESYS Control RTE V3, CODESYS Control RTE V3 (for Beckhoff CX), CODESYS Control Win V3 (also part of the CODESYS Development System setup), CODESYS Control V3 Runtime System Toolkit, CODESYS V3 E
Remediation
Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
References
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Frequently asked questions
What is CVE-2019-5105?
CVE-2019-5105 is a high-severity vulnerability. It was published on March 26, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2019-5105?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2019-5105?
Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2019-5105?
CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-5105 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.
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