USN-3976-3

    Dashboard / Vulnerabilities / USN-3976-3

    USN-3976-3

    Published: 27 May 2019Last Modified: 22 Apr 2026

    Summary: samba regression

    Details: USN-3976-1 fixed a vulnerability in Samba. The update introduced a regression causing Samba to occasionally crash. This update fixes the problem. We apologize for the inconvenience. Original advisory details: Isaac Boukris and Andrew Bartlett discovered that Samba incorrectly checked S4U2Self packets. In certain environments, a remote attacker could possibly use this issue to escalate privileges.

    References: https://ubuntu.com/security/notices/USN-3976-3, https://launchpad.net/bugs/1827924

    Affected packages

    Package

    Name: samba

    Purl: pkg:deb/ubuntu/samba@2:4.3.11+dfsg-0ubuntu0.16.04.21?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2:4.3.11+dfsg-0ubuntu0.16.04.21

    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