Auth bypass in Siemens Siclock Tc100
CVE-2018-4854
A vulnerability has been identified in SICLOCK TC100 (All versions) and SICLOCK TC400 (All versions). An attacker with network access to port 69/udp could modify the administrative client stored on the device. If a legitimate user downloads and executes the modified client from the affected device, then he/she could obtain code execution on the client system.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.025 (84.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.026 · newest: 0.025 · change: -0.000
Affected products
- Siemens Siclock Tc100
- Siemens Siclock Tc100 Firmware
- Siemens Siclock Tc400
- Siemens Siclock Tc400 Firmware
- Siemens Ag Siclock Tc100, Tc400 — versions SICLOCK TC100 : All versions, SICLOCK TC400 : All versions
Weakness classification (CWE)
References
- www.securityfocus.com/bid/104672 (VDB Entry, Third Party Advisory, vdb-entry)
- cert-portal.siemens.com/productcert/pdf/ssa-197012.pdf (Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2018-4854?
- CVE-2018-4854 is a high-severity vulnerability in Siemens Siclock Tc100, classified under Missing Authentication for Critical Function. CVSS score: 8.8/10. Published 2018-07-03.
- How severe is CVE-2018-4854?
- High severity. CVSS v3 base score is 8.8 out of 10.