UBUNTU-CVE-2021-3671

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    UBUNTU-CVE-2021-3671

    Published: 12 Oct 2021Last Modified: 22 Apr 2026
    Upstream:
    CVE-2021-3671

    Summary:

    Details: A null pointer de-reference was found in the way samba kerberos server handled missing sname in TGS-REQ (Ticket Granting Server - Request). An authenticated user could use this flaw to crash the samba server.

    References: https://ubuntu.com/security/CVE-2021-3671, https://ubuntu.com/security/notices/USN-5142-1, https://ubuntu.com/security/notices/USN-5174-1, https://ubuntu.com/security/notices/USN-5675-1, https://www.cve.org/CVERecord?id=CVE-2021-3671

    Affected packages

    Package

    Name: heimdal

    Purl: pkg:deb/ubuntu/[email protected]~git20131207+dfsg-1ubuntu1.2+esm1?arch=source&distro=trusty/esm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.6~git20131207+dfsg-1ubuntu1.2+esm1

    Affected versions

    1.6~git20120403+dfsg1-3ubuntu0.1
    1.6~git20120403+dfsg1-3ubuntu0.2

    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