CVE-2021-37205
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.64%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.64% probability · 75th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-401
- Affected
- siemens/simatic drive controller cpu 1504d tf firmware · siemens/simatic drive controller cpu 1507d tf firmware · siemens/simatic et 200sp open controller cpu 1515sp pc2 firmware · siemens/simatic s7-plcsim advanced firmware · siemens/tim 1531 irc firmware · siemens/simatic s7-1500 software controller · siemens/simatic s7-1200 cpu 1211c firmware · siemens/simatic s7-1200 cpu 1212c firmware · siemens/simatic s7-1200 cpu 1212fc firmware · siemens/simatic s7-1200 cpu 1214fc firmware · siemens/simatic s7-1200 cpu 1214c firmware · siemens/simatic s7-1200 cpu 1215fc firmware · siemens/simatic s7-1200 cpu 1215c firmware · siemens/simatic s7-1200 cpu 1217c firmware · siemens/simatic s7-1500 cpu 1510sp-1 firmware · siemens/simatic s7-1500 cpu 1510sp firmware · siemens/simatic s7-1500 cpu 1511-1 firmware · siemens/simatic s7-1500 cpu 1511c-1 firmware · siemens/simatic s7-1500 cpu 1511f-1 firmware · siemens/simatic s7-1500 cpu 1511t-1 firmware · +28 more
- Source
- productcert@siemens.com
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-838121.pdfPatch, Vendor Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-838121.pdfPatch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.