CVE-2019-5105 Memory corruption in 3S

What is CVE-2019-5105?

CVE-2019-5105 is a high-severity memory corruption vulnerability in 3S, published on 26 Mar 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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 Embedded Target Visu Toolkit, CODESYS V3 Remote Target Visu Toolkit, CODESYS V3 Safety SIL2, CODESYS Edge Gateway V3, CODESYS Gateway V3, CODESYS HMI V3, CODESYS OPC Server V3, CODESYS PLCHandler SDK, CODESYS V3 Simulation Runtime (part of the CODESYS Development System).

Weakness: CWE-787, CWE-119

Which versions are affected by CVE-2019-5105?

It affects 1 product.

Products include Codesys Codesys.

How do I fix CVE-2019-5105?

No fix has been published for CVE-2019-5105 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2019-5105 being exploited?

There is no known exploitation of CVE-2019-5105 in the wild and no public exploit code.

Other vulnerabilities in 3S

• CVE-2019-16265 Memory corruption in n/a Critical 9.8
• CVE-2021-34584 CODESYS V2 web server: crafted requests could trigger a buffer over-read (DoS) Critical 9.1
• CVE-2021-21869 Deserialization in CODESYS High 8.8
• CVE-2021-21867 Deserialization in CODESYS High 8.8
• CVE-2021-21868 Deserialization in CODESYS High 8.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-fhfx-4gh6-9wc2.