Vulnerability in Siemens Simatic Drive Controller Family
CVE-2019-10943
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.010 (60.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
- Siemens Simatic Drive Controller Family — versions All versions
- Siemens Simatic Et 200sp Open Controller CPU 1515sp Pc
- Siemens Simatic Et 200sp Open Controller CPU 1515sp Pc2
- Siemens Simatic Et 200sp Open Controller CPU 1515sp Pc2 Firmware
- Siemens Simatic Et 200sp Open Controller CPU 1515sp Pc2 (Incl. Siplus Variants) — versions All versions >= V20.8, All versions < V20.8
- Siemens Simatic Et 200sp Open Controller CPU 1515sp Pc Firmware
- Siemens Simatic Et 200sp Open Controller CPU 1515sp Pc (Incl. Siplus Variants) — versions All versions
- Siemens Simatic S7-1200 CPU 1211c
- Siemens Simatic S7-1200 CPU 1211c Firmware
- Siemens Simatic S7-1200 CPU 1212c
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cert-portal.siemens.com/productcert/pdf/ssa-232418.pdf (Vendor Advisory)
Frequently asked questions
- What is CVE-2019-10943?
- CVE-2019-10943 is a high-severity vulnerability in Siemens Simatic Drive Controller Family, classified under CWE-353. CVSS score: 7.5/10. Published 2019-08-13.
- How severe is CVE-2019-10943?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2019-10943 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.