Ubuntu 3908-2: Linux kernel (Trusty HWE) vulnerability

    Date13 Mar 2019
    CategoryUbuntu
    1517
    Posted ByLinuxSecurity Advisories
    The system could be made to run programs as an administrator.
    ==========================================================================
    Ubuntu Security Notice USN-3908-2
    March 13, 2019
    
    linux-lts-trusty vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 12.04 ESM
    
    Summary:
    
    The system could be made to run programs as an administrator.
    
    Software Description:
    - linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise ESM
    
    Details:
    
    USN-3908-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04
    LTS. This update provides the corresponding updates for the Linux
    Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu
    12.04 ESM.
    
    Jann Horn discovered a race condition in the fork() system call in the
    Linux kernel. A local attacker could use this to gain access to services
    that cache authorizations.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 12.04 ESM:
      linux-image-3.13.0-166-generic  3.13.0-166.216~precise1
      linux-image-3.13.0-166-generic-lpae  3.13.0-166.216~precise1
      linux-image-3.13.0-166-lowlatency  3.13.0-166.216~precise1
      linux-image-generic-lpae-lts-trusty  3.13.0.166.156
      linux-image-generic-lts-trusty  3.13.0.166.156
    
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
    
    ATTENTION: Due to an unavoidable ABI change the kernel updates have
    been given a new version number, which requires you to recompile and
    reinstall all third party kernel modules you might have installed.
    Unless you manually uninstalled the standard kernel metapackages
    (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
    linux-powerpc), a standard system upgrade will automatically perform
    this as well.
    
    References:
      https://usn.ubuntu.com/usn/usn-3908-2
      https://usn.ubuntu.com/usn/usn-3908-1
      CVE-2019-6133
    
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