UBUNTU-CVE-2022-31214

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    UBUNTU-CVE-2022-31214

    Published: 9 Jun 2022Last Modified: 20 May 2026
    Upstream:
    CVE-2022-31214

    Summary:

    Details: A Privilege Context Switching issue was discovered in join.c in Firejail 0.9.68. By crafting a bogus Firejail container that is accepted by the Firejail setuid-root program as a join target, a local attacker can enter an environment in which the Linux user namespace is still the initial user namespace, the NO_NEW_PRIVS prctl is not activated, and the entered mount namespace is under the attacker's control. In this way, the filesystem layout can be adjusted to gain root privileges through execution of available setuid-root binaries such as su or sudo.

    References: https://ubuntu.com/security/CVE-2022-31214, https://marc.info/[email protected], https://www.cve.org/CVERecord?id=CVE-2022-31214

    Affected packages

    Package

    Name: firejail

    Purl: pkg:deb/ubuntu/firejail?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    0.9.28-1
    0.9.32-1
    0.9.34-1
    0.9.36-1
    0.9.38-1
    0.9.38-1ubuntu0.1
    0.9.38.10-0ubuntu0.16.04.1

    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-2022-31214 | CVE-DB