CVE-2021-23386

    Dashboard / Vulnerabilities / CVE-2021-23386

    CVE-2021-23386

    Published: 20 May 2021Last Modified: 9 Jul 2026

    Summary:

    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.

    References: https://hackerone.com/bugs?subject=user&amp%3Breport_id=968858, https://github.com/mafintosh/dns-packet/commit/25f15dd0fedc53688b25fd053ebbdffe3d5c1c56, https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1295719, https://snyk.io/vuln/SNYK-JS-DNSPACKET-1293563

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -ebdf849da5dc0d96836e87628349776c623c5be7

    Affected versions

    v1.3.3
    v1.3.2
    v1.3.1
    v1.3.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2021-23386 | CVE-DB