Is CVE-2021-42075 in the CISA KEV catalog?

No. CVE-2021-42075 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-42075?

CVE-2021-42075 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-42075?

CVE-2021-42075 has an EPSS score of 2.13% (80th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-42075?

Upgrade barrier to 2.3.4 or later.

CVE & CISA-KEV Catalog

CVE-2021-42075

HIGHEPSS 80th pctl

7.5

CVSS v3

NVD

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.

CWE-772

How to fix

Remediation Available

barrierNVD

Affected:< 2.3.4Fixed in:2.3.4CVE-2021-42075derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

2.13%probability of exploitation in 30 days

80thpercentile

Elevated risk: more likely to be exploited than 80% of all known CVEs.

References

Exploit1

openwall.com

Third-Party Advisory1

github.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.