Improper input validation in Siemens Simatic Drive Controller CPU 1504d Tf
CVE-2021-44695
Affected devices don't process correctly certain special crafted packets sent to port 102/tcp, which could allow an attacker to cause a denial of service in the device.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.008 (54.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 54.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.008 · change: +0.000
Affected products
- Siemens Simatic Drive Controller CPU 1504d Tf — versions All versions < V2.9.7
- Siemens Simatic Drive Controller CPU 1507d Tf — versions All versions < V2.9.7
- Siemens Simatic Et 200 Sp Open Controller CPU 1515sp Pc
- Siemens Simatic Et 200sp Open Controller CPU 1515sp Pc2 (Incl. Siplus Variants) — versions All versions < V21.9.7
- Siemens Simatic Et 200 Sp Open Controller CPU 1515sp Pc Firmware
- Siemens Simatic S7-1200 CPU 1211c
- Siemens Simatic S7-1200 CPU 1211c Firmware
- Siemens Simatic S7-1200 CPU 12 1211c
- Siemens Simatic S7-1200 CPU 12 1211c Firmware
- Siemens Simatic S7-1200 CPU 12 1212c
Weakness classification (CWE)
References
- cert-portal.siemens.com/productcert/pdf/ssa-382653.pdf (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-44695?
- CVE-2021-44695 is a medium-severity vulnerability in Siemens Simatic Drive Controller CPU 1504d Tf, classified under CWE-1286. CVSS score: 4.9/10. Published 2022-12-13.
- How severe is CVE-2021-44695?
- Medium severity. CVSS v3 base score is 4.9 out of 10.