Linux Security
    Linux Security
    Linux Security

    ArchLinux: 202102-26: firejail: privilege escalation

    Date 22 Feb 2021
    73
    Posted By LinuxSecurity Advisories
    The package firejail before version 0.9.64.4-1 is vulnerable to privilege escalation.
    Arch Linux Security Advisory ASA-202102-26
    ==========================================
    
    Severity: High
    Date    : 2021-02-12
    CVE-ID  : CVE-2021-26910
    Package : firejail
    Type    : privilege escalation
    Remote  : No
    Link    : https://security.archlinux.org/AVG-1545
    
    Summary
    =======
    
    The package firejail before version 0.9.64.4-1 is vulnerable to
    privilege escalation.
    
    Resolution
    ==========
    
    Upgrade to 0.9.64.4-1.
    
    # pacman -Syu "firejail>=0.9.64.4-1"
    
    The problem has been fixed upstream in version 0.9.64.4.
    
    Workaround
    ==========
    
    The issue can be mitigated by setting "overlayfs no" in
    /etc/firejail/firejail.config.
    
    Description
    ===========
    
    Firejail before 0.9.64.4 allows attackers to bypass intended access
    restrictions because there is a TOCTOU race condition between a stat
    operation and an OverlayFS mount operation.
    
    Impact
    ======
    
    A local unprivileged attacker can obtain arbitrary file system access
    for an application running within a firejail sandbox, leading to
    potential privilege escalation.
    
    References
    ==========
    
    https://unparalleled.eu/publications/2021/advisory-unpar-2021-0.txt
    https://unparalleled.eu/blog/2021/20210208-rigged-race-against-firejail-for-local-root/
    https://github.com/netblue30/firejail/commit/97d8a03cad19501f017587cc4e47d8418273834b
    https://security.archlinux.org/CVE-2021-26910
    

    Advisories

    LinuxSecurity Poll

    'Tis the season of giving! How have you given back to the open-source community?

    No answer selected. Please try again.
    Please select either existing option or enter your own, however not both.
    Please select minimum 0 answer(s) and maximum 3 answer(s).
    /main-polls/49-tis-the-season-of-giving-how-have-you-given-back-to-the-open-source-community?task=poll.vote&format=json
    49
    radio
    [{"id":"171","title":"I've contributed to the development of an open-source project.","votes":"22","type":"x","order":"1","pct":34.92,"resources":[]},{"id":"172","title":"I've reviewed open-source code for security bugs.","votes":"13","type":"x","order":"2","pct":20.63,"resources":[]},{"id":"173","title":"I've made a donation to an open-source project.","votes":"28","type":"x","order":"3","pct":44.44,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350

    Please vote first in order to view vote results.


    VIEW MORE POLLS

    bottom 200

    Please enable / Bitte aktiviere JavaScript!
    Veuillez activer / Por favor activa el Javascript![ ? ]

    We use cookies to provide and improve our services. By using our site, you consent to our Cookie Policy.