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No exploitation reportedFix available

CVE-2021-42072

No exploitation reported by the sources we read.

  • Published2021-11-08
  • WeaknessCWE-287

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2021-11-0804:15CVE publishedNVD

Versions per branch

NVD
Fedoraproject fedora
BranchAffectedFixed in
34.x= 34no fix published
35.x= 35no fix published
Barrier project barrier
BranchAffectedFixed in
2.4< 2.4.02.4.0

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • barrierSUSE:Package Hub 15 SP3all versions · fixed in 2.4.0-bp153.2.3.1
  • barrieropenSUSE:Tumbleweedall versions · fixed in 2.4.0-1.1
  • barrieropenSUSE:Leap 15.3all versions · fixed in 2.4.0-bp153.2.3.1
  • barrieropenSUSE:Leap 15.2all versions · fixed in 2.4.0-lp152.3.6.1

Vendor advisories

  • CVE-2021-42072 Red Hat Product Security

    barrier: server-side implementation does not sufficiently verify the identify of connecting clients

Full record on NVD

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2021-11-08
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-wvmp-5fvm-29ff

Frequently asked questions

What is CVE-2021-42072?

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.

Is CVE-2021-42072 actively exploited?

Active exploitation of CVE-2021-42072 has not been confirmed. Its EPSS score was 1.7% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-42072?

CVE-2021-42072 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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