Auth bypass in Barrier Project
CVE-2021-42072
An issue was discovered in Barrier before 2.4.0. The barriers component (aka the server-side implementation of Barrier) does not sufficiently verify the identify of connecting clients. Clients can thus exploit weaknesses in the provided protocol to cause denial-of-service or stage further attacks that could lead to information leaks or integrity corruption.
Vulnerability class: Broken Authentication
EPSS: 0.016 (73.3th percentile) — read the EPSS interpretation.
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.
Affected products
- Barrier_project Barrier
- Fedoraproject Fedora — versions 34, 35
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (mailing-list, x_refsource_MLIST, Exploit, Mailing List, Third Party Advisory)
- cve@mitre.org (Third Party Advisory, x_refsource_MISC, Release Notes)
- cve@mitre.org (x_refsource_FEDORA, vendor-advisory)
- cve@mitre.org (x_refsource_FEDORA, vendor-advisory)
Frequently asked questions
- What is CVE-2021-42072?
- CVE-2021-42072 is a high-severity vulnerability in Barrier Project, classified under Improper Authentication. CVSS score: 8.8/10. Published 2021-11-08.
- How severe is CVE-2021-42072?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-42072 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.