Ubuntu 3822-2: Linux kernel (Trusty HWE) vulnerabilities

    Date14 Nov 2018
    CategoryUbuntu
    3112
    Posted ByAnthony Pell
    Several security issues were fixed in the Linux kernel.
    ==========================================================================
    Ubuntu Security Notice USN-3822-2
    November 14, 2018
    
    linux-lts-trusty vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 12.04 ESM
    
    Summary:
    
    Several security issues were fixed in the Linux kernel.
    
    Software Description:
    - linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise ESM
    
    Details:
    
    USN-3822-1 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.
    
    Jim Mattson discovered that the KVM implementation in the Linux kernel
    mismanages the #BP and #OF exceptions. A local attacker in a guest virtual
    machine could use this to cause a denial of service (guest OS crash).
    (CVE-2016-9588)
    
    It was discovered that the generic SCSI driver in the Linux kernel did not
    properly enforce permissions on kernel memory access. A local attacker
    could use this to expose sensitive information or possibly elevate
    privileges. (CVE-2017-13168)
    
    Andrey Konovalov discovered that the CDC USB Ethernet driver did not
    properly validate device descriptors. A physically proximate attacker could
    use this to cause a denial of service (system crash). (CVE-2017-16649)
    
    It was discovered that an integer overflow existed in the CD-ROM driver of
    the Linux kernel. A local attacker could use this to expose sensitive
    information (kernel memory). (CVE-2018-16658)
    
    It was discovered that an integer overflow existed in the HID Bluetooth
    implementation in the Linux kernel that could lead to a buffer overwrite.
    An attacker could use this to cause a denial of service (system crash) or
    possibly execute arbitrary code. (CVE-2018-9363)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 12.04 ESM:
      linux-image-3.13.0-162-generic  3.13.0-162.212~precise1
      linux-image-3.13.0-162-generic-lpae  3.13.0-162.212~precise1
      linux-image-generic-lpae-lts-trusty  3.13.0.162.152
      linux-image-generic-lts-trusty  3.13.0.162.152
    
    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-3822-2
      https://usn.ubuntu.com/usn/usn-3822-1
      CVE-2016-9588, CVE-2017-13168, CVE-2017-16649, CVE-2018-16658,
      CVE-2018-9363
    
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