CVE-2021-36770

    Dashboard / Vulnerabilities / CVE-2021-36770

    CVE-2021-36770

    Published: 11 Aug 2021Last Modified: 8 Jul 2026

    Summary:

    Details: Encode.pm, as distributed in Perl through 5.34.0, allows local users to gain privileges via a Trojan horse Encode::ConfigLocal library (in the current working directory) that preempts dynamic module loading. Exploitation requires an unusual configuration, and certain 2021 versions of Encode.pm (3.05 through 3.11). This issue occurs because the || operator evaluates @INC in a scalar context, and thus @INC has only an integer value.

    References: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5NDGQSGMEZ75FJGBKNYC75OTO7TF7XHB/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6KOZYD7BH2DNIAEZ2ZL4PJ4QUVQI6Y33/, https://metacpan.org/dist/Encode/changes, https://news.cpanel.com/unscheduled-tsr-10-august-2021/, https://security-tracker.debian.org/tracker/CVE-2021-36770, https://security.netapp.com/advisory/ntap-20210909-0003/, https://security.netapp.com/advisory/ntap-20241108-0002/, https://github.com/Perl/perl5/commit/c1a937fef07c061600a0078f4cb53fe9c2136bb9, https://github.com/dankogai/p5-encode/commit/527e482dc70b035d0df4f8c77a00d81f8d775c74

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- f88692871dce592438c65a8d6ea42b3897f18033
    Fixed -527e482dc70b035d0df4f8c77a00d81f8d775c74

    Affected versions

    3.11

    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-2021-36770 | CVE-DB