Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Barrier Project | Barrier | < 2.4.0 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2021/11/02/4ExploitMailing ListThird Party Advisory
- https://github.com/debauchee/barrier/commit/229abab99f39f11624e5651f819e7f1f8edd
- https://github.com/debauchee/barrier/commit/b5adc93e2bd74cb094f91ff595c07f321a48
- https://github.com/debauchee/barrier/releases/tag/v2.4.0Release NotesThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/11/02/4ExploitMailing ListThird Party Advisory
- https://github.com/debauchee/barrier/commit/229abab99f39f11624e5651f819e7f1f8edd
- https://github.com/debauchee/barrier/commit/b5adc93e2bd74cb094f91ff595c07f321a48
- https://github.com/debauchee/barrier/releases/tag/v2.4.0Release NotesThird Party Advisory
FAQ
What is CVE-2021-42073?
CVE-2021-42073 is a vulnerability with a CVSS score of 8.2 (HIGH). 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 ...
How severe is CVE-2021-42073?
CVE-2021-42073 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-42073?
Check the references section above for vendor advisories and patch information. Affected products include: Barrier Project Barrier.