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CVE-2021-23386

Good to know:

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Date: May 20, 2021

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.

Language: JS

Severity Score

Related Resources (5)

https://github.com/mafintosh/dns-packet/commit/25f15dd0fedc53688b25fd053ebbdffe3d5c1c56
https://nvd.nist.gov/vuln/detail/CVE-2021-23386
https://hackerone.com/bugs?subject=user&%3Breport_id=968858
https://github.com/mafintosh/dns-packet/commit/0d0d593f8df4e2712c43957a6c62e95047f12b2d
https://www.mend.io/vulnerability-database/CVE-2021-23386

Severity Score

Weakness Type (CWE)

Information Leak / Disclosure

CWE-200

Use of Uninitialized Resource

CWE-908

Missing Initialization of Resource

CWE-909

Top Fix

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Upgrade Version

Upgrade to version dns-packet - 5.2.2

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): CHANGED
Confidentiality (C): HIGH
Integrity (I): LOW
Availability (A): LOW

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): SINGLE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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