USN-4930-1

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    USN-4930-1

    Published: 29 Apr 2021Last Modified: 22 Apr 2026

    Summary: samba vulnerability

    Details: Peter Eriksson discovered that Samba incorrectly handled certain negative idmap cache entries. This issue could result in certain users gaining unauthorized access to files, contrary to expected behaviour.

    References: https://ubuntu.com/security/notices/USN-4930-1, https://ubuntu.com/security/CVE-2021-20254

    Affected packages

    Package

    Name: samba

    Purl: pkg:deb/ubuntu/samba@2:4.3.11+dfsg-0ubuntu0.16.04.34?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2:4.3.11+dfsg-0ubuntu0.16.04.34

    Affected versions

    2:4.1.17+dfsg-4ubuntu2
    2:4.1.20+dfsg-1ubuntu1
    2:4.1.20+dfsg-1ubuntu2
    2:4.1.20+dfsg-1ubuntu3
    2:4.1.20+dfsg-1ubuntu5

    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
    USN-4930-1 | CVE-DB