Ubuntu 4228-2: Linux kernel (Xenial HWE) vulnerabilities

    Date07 Jan 2020
    128
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the Linux kernel.
    ==========================================================================
    Ubuntu Security Notice USN-4228-2
    January 07, 2020
    
    linux-lts-xenial, linux-aws vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 14.04 ESM
    
    Summary:
    
    Several security issues were fixed in the Linux kernel.
    
    Software Description:
    - linux-aws: Linux kernel for Amazon Web Services (AWS) systems
    - linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty
    
    Details:
    
    USN-4228-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
    LTS. This update provides the corresponding updates for the Linux
    Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
    14.04 ESM.
    
    It was discovered that a heap-based buffer overflow existed in the Marvell
    WiFi-Ex Driver for the Linux kernel. A physically proximate attacker could
    use this to cause a denial of service (system crash) or possibly execute
    arbitrary code. (CVE-2019-14895, CVE-2019-14901)
    
    It was discovered that a heap-based buffer overflow existed in the Marvell
    Libertas WLAN Driver for the Linux kernel. A physically proximate attacker
    could use this to cause a denial of service (system crash) or possibly
    execute arbitrary code. (CVE-2019-14896, CVE-2019-14897)
    
    Anthony Steinhauser discovered that the Linux kernel did not properly
    perform Spectre_RSB mitigations to all processors for PowerPC architecture
    systems in some situations. A local attacker could use this to expose
    sensitive information. (CVE-2019-18660)
    
    It was discovered that Geschwister Schneider USB CAN interface driver in
    the Linux kernel did not properly deallocate memory in certain failure
    conditions. A physically proximate attacker could use this to cause a
    denial of service (kernel memory exhaustion). (CVE-2019-19052)
    
    It was discovered that the driver for memoryless force-feedback input
    devices in the Linux kernel contained a use-after-free vulnerability. A
    physically proximate attacker could possibly use this to cause a denial of
    service (system crash) or execute arbitrary code. (CVE-2019-19524)
    
    It was discovered that the PEAK-System Technik USB driver in the Linux
    kernel did not properly sanitize memory before sending it to the device. A
    physically proximate attacker could use this to expose sensitive
    information (kernel memory). (CVE-2019-19534)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 14.04 ESM:
      linux-image-4.4.0-1060-aws      4.4.0-1060.64
      linux-image-4.4.0-171-generic   4.4.0-171.200~14.04.1
      linux-image-4.4.0-171-generic-lpae  4.4.0-171.200~14.04.1
      linux-image-4.4.0-171-lowlatency  4.4.0-171.200~14.04.1
      linux-image-4.4.0-171-powerpc-e500mc  4.4.0-171.200~14.04.1
      linux-image-4.4.0-171-powerpc-smp  4.4.0-171.200~14.04.1
      linux-image-4.4.0-171-powerpc64-emb  4.4.0-171.200~14.04.1
      linux-image-4.4.0-171-powerpc64-smp  4.4.0-171.200~14.04.1
      linux-image-aws                 4.4.0.1060.61
      linux-image-generic-lpae-lts-xenial  4.4.0.171.150
      linux-image-generic-lts-xenial  4.4.0.171.150
      linux-image-lowlatency-lts-xenial  4.4.0.171.150
      linux-image-powerpc-e500mc-lts-xenial  4.4.0.171.150
      linux-image-powerpc-smp-lts-xenial  4.4.0.171.150
      linux-image-powerpc64-emb-lts-xenial  4.4.0.171.150
      linux-image-powerpc64-smp-lts-xenial  4.4.0.171.150
      linux-image-virtual-lts-xenial  4.4.0.171.150
    
    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/4228-2
      https://usn.ubuntu.com/4228-1
      CVE-2019-14895, CVE-2019-14896, CVE-2019-14897, CVE-2019-14901,
      CVE-2019-18660, CVE-2019-19052, CVE-2019-19524, CVE-2019-19534
    
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