CVE-2021-42074
HIGH
7.5
CVSS Score
Published: November 8, 2021 at 03:52 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. 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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 2.3.4
Affected range stops below 2.3.4, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo 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/2021/11/02/4x_refsource_MISCRelease NotesThird Party Advisory
Source: [email protected]
https://github.com/debauchee/barrier/releases/tag/v2.3.4CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-416
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