An issue was discovered in Barrier before 2.3.4.
Priority LOW 37CWE-772Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-772.
Summary
An issue was discovered in Barrier before 2.3.4. The barriers component (aka the server-side implementation of Barrier) does not correctly close file descriptors for established TCP connections. An unauthenticated remote attacker can thus cause file descriptor exhaustion in the server process, leading to denial of service.
Why it matters now
EPSS 0.02196 82nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:barrier_project:barrier:*:*:*:*:*:*:*:* | before 2.3.4 | Vulnerable | Barrier Project |
- cpe:2.3:a:barrier_project:barrier:*:*:*:*:*:*:*:* Versions before 2.3.4 Vulnerable ·Barrier Project
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2021-42075
- 2026-10-03 Alias added: GHSA-c58c-q645-27mc
References
More Barrier Project Barrier vulnerabilities
- TI-2021-18581 An issue was discovered in Barrier before 2.4.0. CVSS 3.1HIGH 8.8
- TI-2021-18582 An issue was discovered in Barrier before 2.4.0. CVSS 3.1HIGH 8.2
- TI-2021-18585 An issue was discovered in Barrier before 2.3.4. CVSS 3.1HIGH 7.5
- TI-2021-18583 An issue was discovered in Barrier before 2.3.4. CVSS 3.1HIGH 7.5
Sources
- CVE-2021-42075 · CVE Program
- CVE-2021-42075 · NVD
- FIRST EPSS
- GHSA-c58c-q645-27mc · GitHub Advisory Database · CC BY 4.0
- CVE-2021-42075 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences