CVE-2019-10943
HIGHDescription
A vulnerability has been identified in SIMATIC Drive Controller family (All versions), SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants) (All versions), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions < V20.8), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions >= V20.8), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions < V4.4.0), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions >= V4.4.0), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions < V2.8.1), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions >= V2.8.1), SIMATIC S7-1500 Software Controller (All versions < V20.8), SIMATIC S7-1500 Software Controller (All versions >= V20.8), SIMATIC S7-PLCSIM Advanced (All versions < V3.0), SIMATIC S7-PLCSIM Advanced (All versions >= V3.0). An attacker with network access to port 102/tcp could potentially modify the user program on the PLC in a way that the running code is different from the source code which is stored on the device. An attacker must have network access to affected devices and must be able to perform changes to the user program. The vulnerability could impact the perceived integrity of the user program stored on the CPU. An engineer that tries to obtain the code of the user program running on the device, can receive different source code that is not actually running on the device.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Exploit Intelligence
Moderate risk: more likely to be exploited than 58% of all known CVEs.
References
Related Vulnerabilities
Other CWE-353 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2021-28545 | High | 8.1 | 2.3% | - | - |
| CVE-2021-28546 | Medium | 6.5 | 1.4% | - | - |
| CVE-2020-10124 | High | 7.1 | 0.7% | - | - |
| CVE-2020-7878 | Critical | 9.8 | 0.7% | - | - |
| CVE-2020-7808 | High | 8.7 | 0.7% | - | - |
| CVE-2023-29290 | Medium | 5.3 | 0.6% | - | - |
Common questions
How do I fix CVE-2019-10943?
Published advisories record a fix for 11 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.
Is CVE-2019-10943 being actively exploited?
Not that we know of. CVE-2019-10943 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.95% is the estimated probability that it will be exploited in the next 30 days. That is higher than 58% of all scored CVEs.
How severe is CVE-2019-10943?
CVE-2019-10943 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2019-10943 affect?
Published advisories record a fix for simatic et 200sp open controller cpu 1515sp pc2 firmware (NVD), simatic s7-1200 cpu 1211c firmware (NVD), simatic s7-1200 cpu 1212c firmware (NVD), simatic s7-1200 cpu 1214c firmware (NVD), and 7 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.