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Vulnerability · Published Sep 9, 2020 · Assigned by siemens

CVE-2020-15791

Medium 6.5

In plain English

A medium-severity security flaw in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) from Siemens. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.7%top 46.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

VendorProductVersions
Siemens SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) All versions
Siemens SIMATIC S7-400 CPU family (incl. SIPLUS variants) All versions
Siemens SIMATIC WinAC RTX (F) 2010 All versions
Siemens SINUMERIK 840D sl All versions

Weakness: CWE-522 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References