CVE-2020-15791

MEDIUM

Siemens Simatic S7-300 Cpu 312 Firmware - Insufficiently Protected ...

Title source: rule

Description

A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC S7-400 CPU family (incl. SIPLUS variants) (All versions), SIMATIC WinAC RTX (F) 2010 (All versions), SINUMERIK 840D sl (All versions). The authentication protocol between a client and a PLC via port 102/tcp (ISO-TSAP) insufficiently protects the transmitted password. This could allow an attacker that is able to intercept the network traffic to obtain valid PLC credentials.

References (1)

[Vendor Advisory] https://cert-portal.siemens.com/productcert/pdf/ssa-381684.pdf

Scores

CVSS v3 6.5

EPSS 0.0008

EPSS Percentile 23.8%

Attack Vector ADJACENT_NETWORK

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Classification

CWE

CWE-522

Status published

Affected Products (14)

siemens/simatic_s7-300_cpu_312_firmware

siemens/simatic_s7-300_cpu_314_firmware

siemens/simatic_s7-300_cpu_315-2_dp_firmware

siemens/simatic_s7-300_cpu_315-2_pn_firmware

siemens/simatic_s7-300_cpu_317-2_pn_firmware

siemens/simatic_s7-300_cpu_317-2_dp_firmware

siemens/simatic_s7-300_cpu_315f-2_dp_firmware

siemens/simatic_s7-300_cpu_315f-2_pn_firmware

siemens/simatic_s7-300_cpu_317f-2_pn_firmware

siemens/simatic_s7-300_cpu_317f-2_dp_firmware

siemens/simatic_s7-400_cpu_412_firmware

siemens/simatic_s7-400_cpu_414_firmware

siemens/simatic_s7-400_cpu_416_firmware

siemens/simatic_s7-400_cpu_417_firmware

Timeline

Published Sep 09, 2020

Tracked Since Feb 18, 2026