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Vulnerability · Published Feb 9, 2022 · Assigned by siemens

CVE-2021-37205

High 7.5

In plain English

A high-severity memory leak in SIMATIC Drive Controller family from Siemens. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.6% (higher than 76% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)1.6%top 23.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A vulnerability has been identified in SIMATIC Drive Controller family (All versions >= V2.9.2 < V2.9.4), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions >= V21.9 < V21.9.4), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions >= V4.5.0 < V4.5.2), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions >= V2.9.2 < V2.9.4), SIMATIC S7-1500 Software Controller (All versions >= V21.9 < V21.9.4), SIMATIC S7-PLCSIM Advanced (All versions >= V4.0 < V4.0 SP1), SIPLUS TIM 1531 IRC (All versions < V2.3.6), TIM 1531 IRC (All versions < V2.3.6). An unauthenticated attacker could cause a denial-of-service condition in a PLC when sending specially prepared packets over port 102/tcp. A restart of the affected device is needed to restore normal operations.

Affected products (as reported)

VendorProductVersions
Siemens SIMATIC Drive Controller family All versions >= V2.9.2 < V2.9.4
Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) All versions >= V21.9 < V21.9.4
Siemens SIMATIC S7-1200 CPU family (incl. SIPLUS variants) All versions >= V4.5.0 < V4.5.2
Siemens SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) All versions >= V2.9.2 < V2.9.4
Siemens SIMATIC S7-1500 Software Controller All versions >= V21.9 < V21.9.4
Siemens SIMATIC S7-PLCSIM Advanced All versions >= V4.0 < V4.0 SP1
Siemens SIPLUS TIM 1531 IRC All versions < V2.3.6
Siemens TIM 1531 IRC All versions < V2.3.6

Weakness: CWE-401 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C

References