Cyber Resilience

CVE-2021-23386

High

Published: 20 May 2021

Published
20 May 2021
Modified
21 November 2024
KEV Added
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Patch
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CVSS Score v3.1 7.7 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L
EPSS Score 0.0045 64.0th percentile
Risk Priority 16 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-23386 is a high-severity Missing Initialization of Resource (CWE-909) vulnerability in Dns-Packet Project Dns-Packet. Its CVSS base score is 7.7 (High).

Operationally, ranked in the top 36.0% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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(s)
CWE-909

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

dns-packet project
dns-packet
≤ 1.3.4 · 2.0.0 — 5.2.2

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References