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)
EPSS: 0.017 (75.1th percentile) — read the EPSS interpretation.
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.
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
- productcert@siemens.com (x_refsource_MISC, 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.