UBUNTU-CVE-2021-20208

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    UBUNTU-CVE-2021-20208

    Published: 19 Apr 2021Last Modified: 4 Feb 2026
    Upstream:
    CVE-2021-20208

    Summary:

    Details: A flaw was found in cifs-utils in versions before 6.13. A user when mounting a krb5 CIFS file system from within a container can use Kerberos credentials of the host. The highest threat from this vulnerability is to data confidentiality and integrity.

    References: https://ubuntu.com/security/CVE-2021-20208, https://lists.samba.org/archive/samba-technical/2021-April/136467.html, https://ubuntu.com/security/notices/USN-5459-1, https://www.cve.org/CVERecord?id=CVE-2021-20208, https://ubuntu.com/security/notices/USN-7688-1

    Affected packages

    Package

    Name: cifs-utils

    Purl: pkg:deb/ubuntu/cifs-utils@2:6.0-1ubuntu2+esm1?arch=source&distro=esm-infra-legacy/trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2:6.0-1ubuntu2+esm1

    Affected versions

    2:6.0-1ubuntu2

    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
    UBUNTU-CVE-2021-20208 | CVE-DB