VulnerabilityModified
CVE-2019-10121
An attacker can obtain a session ID via the user authentication dialogue, aka HMCCU-153.
CRITICAL 9.8EPSS 4.63%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.63%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
eQ-3 HomeMatic CCU2 devices before 2.41.8 and CCU3 devices before 3.43.15 use session IDs for authentication but lack authorization checks. An attacker can obtain a session ID via the user authentication dialogue, aka HMCCU-153. This leads to automatic login as admin.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 4.63% probability · 91th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-306
- Affected
- eq-3/ccu3 firmware · eq-3/ccu2 firmware
- Source
- cve@mitre.org
References
- https://os-s.de/advisories/OSS-2018-01.pdfBroken Link
- https://www.eq-3.de/Downloads/Software/CCU3-Firmware/CCU3-3.43.16/CCU3-Changelog.3.43.16.pdfRelease Notes, Vendor Advisory
- https://www.eq-3.de/Downloads/Software/HM-CCU2-Firmware_Updates/HM-CCU-2.41.9/HM-CCU2-Changelog.2.41.9.pdfRelease Notes, Vendor Advisory
- https://os-s.de/advisories/OSS-2018-01.pdfBroken Link
- https://www.eq-3.de/Downloads/Software/CCU3-Firmware/CCU3-3.43.16/CCU3-Changelog.3.43.16.pdfRelease Notes, Vendor Advisory
- https://www.eq-3.de/Downloads/Software/HM-CCU2-Firmware_Updates/HM-CCU-2.41.9/HM-CCU2-Changelog.2.41.9.pdfRelease Notes, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.