Auth bypass in Siemens Simatic Cn 4100
CVE-2023-49251
A vulnerability has been identified in SIMATIC CN 4100 (All versions < V2.7). The "intermediate installation" system state of the affected application allows an attacker to add their own login credentials to the device. This allows an attacker to remotely login as root and take control of the device even after the affected device is fully set up.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (43.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Siemens Simatic Cn 4100 — versions All versions < V2.7
- Siemens Simatic Cn 4100
- Siemens Simatic Cn 4100 Firmware
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cert-portal.siemens.com/productcert/pdf/ssa-777015.pdf (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2023-49251?
- CVE-2023-49251 is a high-severity vulnerability in Siemens Simatic Cn 4100, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.8/10. Published 2024-01-09.
- How severe is CVE-2023-49251?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2023-49251 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.