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CVE-2021-42075

HIGH
7.5
CVSS Score
Published: November 8, 2021 at 03:55 AM UTC
Updated: June 17, 2026 at 04:09 AM UTC
1 product affected across 1 vendorBarrier

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Severity
HIGH7.5
Exploit prediction
EPSS 2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Barrier· Barrier Project
95%
v < 2.3.4
Affected range stops below 2.3.4, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Mailing Listx_refsource_MLISTExploitThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2021/11/02/4
x_refsource_MISCRelease NotesThird Party Advisory
Source: [email protected]
https://github.com/debauchee/barrier/releases/tag/v2.3.4

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-772

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