CVE-2019-18336: siemens ag simatic s7-300 cpu family (incl. related et200 cpus and siplus variants) Uncontrolled Resource Consumption

Vulnerability summary

CVE-2019-18336 is a high (CVSS 7.8) Uncontrolled Resource Consumption vulnerability in siemens ag simatic s7-300 cpu family (incl. related et200 cpus and siplus variants). EPSS estimates a 1.72% chance of exploitation in the next 30 days, higher than 77% of scored vulnerabilities.

Timeline

1. 10-03-2020
   PublishedVulnerability first disclosed.
2. 02-06-2026
   Last modifiedVulnerability information updated.

Description

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.

• CWE-400Uncontrolled Resource ConsumptionThe product does not properly control the allocation and maintenance of a limited resource.