Resource exhaustion in Siemens Simatic S7-300 CPU
CVE-2019-18336
A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions < V3.X.17), SIMATIC TDC CP51M1 (All versions < V1.1.8), SIMATIC TDC CPU555 (All versions < V1.1.1), SINUMERIK 840D sl (All versions < V4.8.6), SINUMERIK 840D sl (All versions < V4.94). Specially crafted packets sent to port 102/tcp (Profinet) could cause the affected device to go into defect mode. A restart is required in order to recover the system. Successful exploitation requires an attacker to have network access to port 102/tcp, with no authentication. No user interation is required. At the time of advisory publication no public exploitation of this security vulnerability was known.
Vulnerability class: DoS (Denial of Service)
EPSS: 0.017 (75.9th 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
- Siemens Simatic_s7-300_cpu_312_ifm
- Siemens Simatic_s7-300_cpu_312_ifm_firmware
- Siemens Simatic_s7-300_cpu_313
- Siemens Simatic_s7-300_cpu_313_firmware
- Siemens Simatic_s7-300_cpu_314
- Siemens Simatic_s7-300_cpu_314_firmware
- Siemens Simatic_s7-300_cpu_314_ifm
- Siemens Simatic_s7-300_cpu_314_ifm_firmware
- Siemens Simatic_s7-300_cpu_315
Weakness classification (CWE)
References
- productcert@siemens.com (x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2019-18336?
- CVE-2019-18336 is a high-severity vulnerability in Siemens Simatic S7-300 CPU, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2020-03-10.
- How severe is CVE-2019-18336?
- High severity. CVSS v3 base score is 7.5 out of 10.