Resource exhaustion in Siemens Simatic S7-300 CPU 312
CVE-2020-15783
A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC TDC CPU555 (All versions), SINUMERIK 840D sl (All versions). Sending multiple specially crafted packets to the affected devices could cause a Denial-of-Service on port 102. A cold restart is required to recover the service.
Vulnerability class: DoS (Denial of Service)
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:N/A:H.
EPSS exploit prediction
EPSS: 0.017 (76.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 76.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000
Affected products
- Siemens Simatic S7-300 CPU 312
- Siemens Simatic S7-300 CPU 312 Firmware
- Siemens Simatic S7-300 CPU 314
- Siemens Simatic S7-300 CPU 314 Firmware
- Siemens Simatic S7-300 CPU 315-2 Dp
- Siemens Simatic S7-300 CPU 315-2 Dp Firmware
- Siemens Simatic S7-300 CPU 315-2 Pn
- Siemens Simatic S7-300 CPU 315-2 Pn Firmware
- Siemens Simatic S7-300 CPU 315f-2 Dp
- Siemens Simatic S7-300 CPU 315f-2 Dp Firmware
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cert-portal.siemens.com/productcert/pdf/ssa-492828.pdf (Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-15783?
- CVE-2020-15783 is a high-severity vulnerability in Siemens Simatic S7-300 CPU 312, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2020-11-12.
- How severe is CVE-2020-15783?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-15783 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.