Is CVE-2021-23386 in the CISA KEV catalog?

No. CVE-2021-23386 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-23386?

CVE-2021-23386 has a CVSS v3 base score of 7.7 (HIGH).

What is the EPSS score for CVE-2021-23386?

CVE-2021-23386 has an EPSS score of 1.43% (70th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-23386?

Upgrade dns-packet to 5.2.2 or later.

CVE & CISA-KEV Catalog

CVE-2021-23386

HIGH

7.7

CVSS v3

NVD

Description

This affects the package dns-packet before 5.2.2. It creates buffers with allocUnsafe and does not always fill them before forming network packets. This can expose internal application memory over unencrypted network when querying crafted invalid domain names.

CWE-909

How to fix

Remediation Available

dns-packetNVD

Affected:>= 2.0.0, < 5.2.2Fixed in:5.2.2CVE-2021-23386derived 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 ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityLow

AvailabilityLow

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

Exploit Intelligence

1.43%probability of exploitation in 30 days

70thpercentile

Moderate risk: more likely to be exploited than 70% of all known CVEs.

References

Patch3

Third-Party Advisory1

hackerone.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.