Ubuntu 2858-3: Linux kernel (Raspberry Pi 2) vulnerability

    Date05 Jan 2016
    CategoryUbuntu
    37
    Posted ByLinuxSecurity Advisories
    The system could be made to run programs as an administrator.
    ==========================================================================
    Ubuntu Security Notice USN-2858-3
    January 05, 2016
    
    linux-raspi2 vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 15.10
    
    Summary:
    
    The system could be made to run programs as an administrator.
    
    Software Description:
    - linux-raspi2: Linux kernel for Raspberry Pi 2
    
    Details:
    
    Nathan Williams discovered that overlayfs in the Linux kernel incorrectly
    handled setattr operations. A local unprivileged attacker could use this to
    create files with administrative permission attributes and execute
    arbitrary code with elevated privileges.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 15.10:
      linux-image-4.2.0-1018-raspi2   4.2.0-1018.25
    
    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:
      http://www.ubuntu.com/usn/usn-2858-3
      http://www.ubuntu.com/usn/usn-2858-1
      CVE-2015-8660
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-raspi2/4.2.0-1018.25
    
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