Auth bypass in Siemens Siclock Tc100
CVE-2018-4853
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 firmware of the device.
Vulnerability class: Broken Authentication
EPSS: 0.023 (81.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
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
- productcert@siemens.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
- productcert@siemens.com (x_refsource_CONFIRM, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2018-4853?
- CVE-2018-4853 is a critical-severity vulnerability in Siemens Siclock Tc100, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2018-07-03.
- How severe is CVE-2018-4853?
- Critical severity. CVSS v3 base score is 9.8 out of 10.