Auth bypass in Bab-Technologie Eibport
CVE-2021-28911
BAB TECHNOLOGIE GmbH eibPort V3 prior version 3.9.1 allow unauthenticated attackers access to /tmp path which contains some sensitive data (e.g. device serial number). Having those info, a possible loginId can be self-calculated in a brute force attack against BMX interface. This is usable and part of an attack chain to gain SSH root access.
EPSS: 0.017 (74.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Bab-technologie Eibport — versions v3
- Bab-technologie Eibport_firmware
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-28911?
- CVE-2021-28911 is a critical-severity vulnerability in Bab-Technologie Eibport, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 9.8/10. Published 2021-09-09.
- How severe is CVE-2021-28911?
- Critical severity. CVSS v3 base score is 9.8 out of 10.