CVE-2021-3672

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    CVE-2021-3672

    Published: 23 Nov 2021Last Modified: 8 Jul 2026

    Summary:

    Details: A flaw was found in c-ares library, where a missing input validation check of host names returned by DNS (Domain Name Servers) can lead to output of wrong hostnames which might potentially lead to Domain Hijacking. The highest threat from this vulnerability is to confidentiality and integrity as well as system availability.

    References: https://security.gentoo.org/glsa/202401-02, https://www.oracle.com/security-alerts/cpujul2022.html, https://bugzilla.redhat.com/show_bug.cgi?id=1988342, https://c-ares.haxx.se/adv_20210810.html, https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -6654436a307a5a686b008c1d4c93b0085da6e6d8

    Affected versions

    cares-1_17_1

    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-2021-3672 | CVE-DB