Use After Free in Barrier Project
CVE-2021-42074
An issue was discovered in Barrier before 2.3.4. An unauthenticated attacker can cause a segmentation fault in the barriers component (aka the server-side implementation of Barrier) by quickly opening and closing TCP connections while sending a Hello message for each TCP session.
Vulnerability class: Use-After-Free
EPSS: 0.017 (74.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Barrier_project Barrier
- N/a — versions n/a
Weakness classification (CWE)
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)
Frequently asked questions
- What is CVE-2021-42074?
- CVE-2021-42074 is a high-severity vulnerability in Barrier Project, classified under Use After Free. CVSS score: 7.5/10. Published 2021-11-08.
- How severe is CVE-2021-42074?
- High severity. CVSS v3 base score is 7.5 out of 10.