CVE-2021-42075

HIGH

Barrier < 2.3.4 - Unauthenticated Denial of Service via File Descriptor Exhaustion

Title source: llm
STIX 2.1

Description

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.

References (2)

Core 2
Core References
Exploit, Mailing List, Third Party Advisory mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2021/11/02/4
Release Notes, Third Party Advisory x_refsource_misc
https://github.com/debauchee/barrier/releases/tag/v2.3.4

Scores

CVSS v3 7.5
EPSS 0.0213
EPSS Percentile 79.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-772
Status published
Products (1)
barrier_project/barrier < 2.3.4
Published Nov 08, 2021
Tracked Since Feb 18, 2026