CVE-2016-20013

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    CVE-2016-20013

    Published: 19 Feb 2022Last Modified: 10 Mar 2026

    Summary:

    Details: sha256crypt and sha512crypt through 0.6 allow attackers to cause a denial of service (CPU consumption) because the algorithm's runtime is proportional to the square of the length of the password.

    References: , https://twitter.com/solardiz/status/795601240151457793, https://akkadia.org/drepper/SHA-crypt.txt, https://pthree.org/2018/05/23/do-not-use-sha256crypt-sha512crypt-theyre-dangerous/

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    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-2016-20013 | CVE-DB