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CVE-2021-42072

HIGH
8.8
CVSS Score
Published: November 8, 2021 at 03:44 AM UTC
Updated: June 17, 2026 at 04:09 AM UTC
2 products affected across 2 vendorsFedoraBarrier

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Severity
HIGH8.8
Exploit prediction
EPSS 2%

Description

An issue was discovered in Barrier before 2.4.0. The barriers component (aka the server-side implementation of Barrier) does not sufficiently verify the identify of connecting clients. Clients can thus exploit weaknesses in the provided protocol to cause denial-of-service or stage further attacks that could lead to information leaks or integrity corruption.

Affected

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

Barrier· Barrier Project
95%
v < 2.4.0
Affected range stops below 2.4.0, so it looks safe — our inference, not a vendor statement
Fedora· Fedora Projectrpm
95%
3435

References (4)

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/v2.4.0
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CIEVNCFEFO7L3NTM4VUZB3WKYYCBTFCI/
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XMU3STOKHPEZSC54MZ42YBFFC2R3BU2Q/

CVSS

8.8HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-287

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