CVE-2021-43566

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    CVE-2021-43566

    Published: 11 Jan 2022Last Modified: 9 Jul 2026

    Summary:

    Details: All versions of Samba prior to 4.13.16 are vulnerable to a malicious client using an SMB1 or NFS race to allow a directory to be created in an area of the server file system not exported under the share definition. Note that SMB1 has to be enabled, or the share also available via NFS in order for this attack to succeed.

    References: https://security.netapp.com/advisory/ntap-20220110-0001/, https://bugzilla.samba.org/show_bug.cgi?id=13979, https://www.samba.org/samba/security/CVE-2021-43566.html

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -27a1dfbce256b65a79b88b5fbc9b4701c05488f9

    Affected versions

    samba-4.13.15
    samba-4.13.14
    samba-4.13.13
    samba-4.13.12
    samba-4.13.11
    samba-4.13.10
    samba-4.13.9
    samba-4.13.5
    samba-4.13.4
    samba-4.13.3
    samba-4.13.2
    samba-4.13.0
    samba-4.13.0rc6
    samba-4.13.0rc5
    samba-4.13.0rc4
    samba-4.13.0rc3
    samba-4.13.0rc2
    samba-4.13.0rc1

    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-2021-43566 | CVE-DB