Vulnerability in Barrier Project
CVE-2021-42073
An issue was discovered in Barrier before 2.4.0. An attacker can enter an active session state with the barriers component (aka the server-side implementation of Barrier) simply by supplying a client label that identifies a valid client configuration. This label is "Unnamed" by default but could instead be guessed from hostnames or other publicly available information. In the active session state, an attacker can capture input device events from the server, and also modify the clipboard content on the server.
EPSS: 0.014 (69.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N.
Affected products
- Barrier_project Barrier
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (mailing-list, Exploit, Mailing List, Third Party Advisory)
- cve@mitre.org (Third Party Advisory, Release Notes)
- cve@mitre.org
- cve@mitre.org
Frequently asked questions
- What is CVE-2021-42073?
- CVE-2021-42073 is a high-severity vulnerability in Barrier Project, classified under Session Fixation. CVSS score: 8.2/10. Published 2021-11-08.
- How severe is CVE-2021-42073?
- High severity. CVSS v3 base score is 8.2 out of 10.
- Is CVE-2021-42073 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.