Buffer overflow in Siemens Simatic S7-400 CPU 412-1 Dp V7
CVE-2021-40368
A vulnerability has been identified in SIMATIC S7-400 CPU 412-1 DP V7 (All versions), SIMATIC S7-400 CPU 412-2 DP V7 (All versions), SIMATIC S7-400 CPU 412-2 PN/DP V7 (All versions < V7.0.3), SIMATIC S7-400 CPU 414-2 DP V7 (All versions), SIMATIC S7-400 CPU 414-3 DP V7 (All versions), SIMATIC S7-400 CPU 414-3 PN/DP V7 (All versions < V7.0.3), SIMATIC S7-400 CPU 414F-3 PN/DP V7 (All versions < V7.0.3), SIMATIC S7-400 CPU 416-2 DP V7 (All versions), SIMATIC S7-400 CPU 416-3 DP V7 (All versions), SIMATIC S7-400 CPU 416-3 PN/DP V7 (All versions < V7.0.3), SIMATIC S7-400 CPU 416F-2 DP V7 (All versions), SIMATIC S7-400 CPU 416F-3 PN/DP V7 (All versions < V7.0.3), SIMATIC S7-400 CPU 417-4 DP V7 (All versions), SIMATIC S7-400 H V6 CPU family (incl. SIPLUS variants) (All versions < V6.0.10), SIMATIC S7-410 V10 CPU family (incl. SIPLUS variants) (All versions < V10.1), SIMATIC S7-410 V8 CPU family (incl. SIPLUS variants) (All versions < V8.2.3), SIPLUS S7-400 CPU 414-3 PN/DP V7 (All versions < V7.0.3), SIPLUS S7-400 CPU 416-3 PN/DP V7 (All versions < V7.0.3), SIPLUS S7-400 CPU 416-3 V7 (All versions), SIPLUS S7-400 CPU 417-4 V7 (All versions). Affected devices improperly handle specially crafted packets sent to port 102/tcp. This could allow an attacker to create a Denial-of-Service condition. A restart is needed to restore normal operations.
Vulnerability class: Buffer Overflow
EPSS: 0.010 (58.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Siemens Simatic S7-400 Cpu 412-1 Dp V7 — versions All versions
- Siemens Simatic S7-400 Cpu 412-2 Dp V7 — versions All versions
- Siemens Simatic S7-400 Cpu 412-2 Pn/dp V7 — versions All versions < V7.0.3
- Siemens Simatic S7-400 Cpu 414-2 Dp V7 — versions All versions
- Siemens Simatic S7-400 Cpu 414-3 Dp V7 — versions All versions
- Siemens Simatic S7-400 Cpu 414-3 Pn/dp V7 — versions All versions < V7.0.3
- Siemens Simatic S7-400 Cpu 414f-3 Pn/dp V7 — versions All versions < V7.0.3
- Siemens Simatic S7-400 Cpu 416-2 Dp V7 — versions All versions
- Siemens Simatic S7-400 Cpu 416-3 Dp V7 — versions All versions
- Siemens Simatic S7-400 Cpu 416-3 Pn/dp V7 — versions All versions < V7.0.3
Weakness classification (CWE)
References
- productcert@siemens.com (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-40368?
- CVE-2021-40368 is a high-severity vulnerability in Siemens Simatic S7-400 CPU 412-1 Dp V7, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2022-04-12.
- How severe is CVE-2021-40368?
- High severity. CVSS v3 base score is 7.5 out of 10.