ArchLinux: 202004-3: linux-lts: privilege escalation

    Date 01 Apr 2020
    249
    Posted By LinuxSecurity Advisories
    The package linux-lts before version 5.4.28-2 is vulnerable to privilege escalation.
    Arch Linux Security Advisory ASA-202004-3
    =========================================
    
    Severity: High
    Date    : 2020-04-01
    CVE-ID  : CVE-2020-8835
    Package : linux-lts
    Type    : privilege escalation
    Remote  : No
    Link    : https://security.archlinux.org/AVG-1121
    
    Summary
    =======
    
    The package linux-lts before version 5.4.28-2 is vulnerable to
    privilege escalation.
    
    Resolution
    ==========
    
    Upgrade to 5.4.28-2.
    
    # pacman -Syu "linux-lts>=5.4.28-2"
    
    The problem has been fixed upstream but no release is available yet.
    
    Workaround
    ==========
    
    BPF access can be restricted to privileged users by setting
    kernel.unprivileged_bpf_disabled to 1:
    
    # sysctl -w kernel.unprivileged_bpf_disabled=1
    
    Description
    ===========
    
    An out-of-bounds access flaw was found in the Linux kernel’s
    implementation of the eBPF code verifier, where an incorrect register
    bounds calculation while checking 32-bit instructions in an eBPF
    program occurs. This flaw allows an unprivileged user or process to
    execute eBPF programs to crash the kernel, resulting in a denial of
    service or potentially gaining root privileges on the system.
    
    Impact
    ======
    
    An unprivileged local user or process can crash the kernel, resulting
    in a denial of service, or potentially gain root privileges on the
    system.
    
    References
    ==========
    
    https://www.thezdi.com/blog/2020/3/19/pwn2own-2020-day-one-results
    https://lore.kernel.org/bpf/This email address is being protected from spambots. You need JavaScript enabled to view it./T/
    https://www.openwall.com/lists/oss-security/2020/03/30/3
    https://security.archlinux.org/CVE-2020-8835
    
    

    LinuxSecurity Poll

    What do you think of the LinuxSecurity Privacy news articles?

    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/25-what-do-you-think-of-the-linuxsecurity-privacy-news-articles?task=poll.vote&format=json
    25
    radio
    [{"id":"90","title":"Love them!","votes":"97","type":"x","order":"1","pct":80.17,"resources":[]},{"id":"91","title":"I'm indifferent","votes":"18","type":"x","order":"2","pct":14.88,"resources":[]},{"id":"92","title":"Not interested in this topic","votes":"6","type":"x","order":"3","pct":4.96,"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
    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.