Resource exhaustion in Siemens Simatic Net Cp 343-1 Advanced
CVE-2020-25242
A vulnerability has been identified in SIMATIC NET CP 343-1 Advanced (incl. SIPLUS variants) (All versions), SIMATIC NET CP 343-1 Lean (incl. SIPLUS variants) (All versions), SIMATIC NET CP 343-1 Standard (incl. SIPLUS variants) (All versions). Specially crafted packets sent to TCP port 102 could cause a Denial-of-Service condition on the affected devices. A cold restart might be necessary in order to recover.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.013 (68.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 68.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
- Siemens Simatic Net Cp 343-1 Advanced
- Siemens Simatic Net Cp 343-1 Advanced Firmware
- Siemens Simatic Net Cp 343-1 Advanced (Incl. Siplus Variants) — versions All versions
- Siemens Simatic Net Cp 343-1 Lean
- Siemens Simatic Net Cp 343-1 Lean Firmware
- Siemens Simatic Net Cp 343-1 Lean (Incl. Siplus Variants) — versions All versions
- Siemens Simatic Net Cp 343-1 Standard
- Siemens Simatic Net Cp 343-1 Standard Firmware
- Siemens Simatic Net Cp 343-1 Standard (Incl. Siplus Variants) — versions All versions
Weakness classification (CWE)
References
- cert-portal.siemens.com/productcert/pdf/ssa-676775.pdf (Vendor Advisory)
- us-cert.cisa.gov/ics/advisories/icsa-21-131-07 (US Government Resource, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-25242?
- CVE-2020-25242 is a high-severity vulnerability in Siemens Simatic Net Cp 343-1 Advanced, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2021-05-12.
- How severe is CVE-2020-25242?
- High severity. CVSS v3 base score is 7.5 out of 10.