Ubuntu 3485-2: Linux kernel (Xenial HWE) vulnerabilities

    Date21 Nov 2017
    CategoryUbuntu
    102
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the Linux kernel.
    ==========================================================================
    Ubuntu Security Notice USN-3485-2
    November 21, 2017
    
    linux-lts-xenial vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 14.04 LTS
    
    Summary:
    
    Several security issues were fixed in the Linux kernel.
    
    Software Description:
    - linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty
    
    Details:
    
    USN-3485-1 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 LTS.
    
    It was discovered that a race condition existed in the ALSA subsystem of
    the Linux kernel when creating and deleting a port via ioctl(). A local
    attacker could use this to cause a denial of service (system crash) or
    possibly execute arbitrary code. (CVE-2017-15265)
    
    Eric Biggers discovered that the key management subsystem in the Linux
    kernel did not properly restrict adding a key that already exists but is
    uninstantiated. A local attacker could use this to cause a denial of
    service (system crash) or possibly execute arbitrary code. (CVE-2017-15299)
    
    It was discovered that a race condition existed in the packet fanout
    implementation in the Linux kernel. A local attacker could use this to
    cause a denial of service (system crash) or possibly execute arbitrary
    code. (CVE-2017-15649)
    
    Eric Biggers discovered a race condition in the key management subsystem of
    the Linux kernel around keys in a negative state. A local attacker could
    use this to cause a denial of service (system crash) or possibly execute
    arbitrary code. (CVE-2017-15951)
    
    Andrey Konovalov discovered a use-after-free vulnerability in the USB
    serial console driver in the Linux kernel. A physically proximate attacker
    could use this to cause a denial of service (system crash) or possibly
    execute arbitrary code. (CVE-2017-16525)
    
    Andrey Konovalov discovered that the Ultra Wide Band driver in the Linux
    kernel did not properly check for an error condition. A physically
    proximate attacker could use this to cause a denial of service (system
    crash) or possibly execute arbitrary code. (CVE-2017-16526)
    
    Andrey Konovalov discovered that the ALSA subsystem in the Linux kernel
    contained a use-after-free vulnerability. A local attacker could use this
    to cause a denial of service (system crash) or possibly execute arbitrary
    code. (CVE-2017-16527)
    
    Andrey Konovalov discovered that the ALSA subsystem in the Linux kernel did
    not properly validate USB audio buffer descriptors. A physically proximate
    attacker could use this cause a denial of service (system crash) or
    possibly execute arbitrary code. (CVE-2017-16529)
    
    Andrey Konovalov discovered that the USB unattached storage driver in the
    Linux kernel contained out-of-bounds error when handling alternative
    settings. A physically proximate attacker could use to cause a denial of
    service (system crash) or possibly execute arbitrary code. (CVE-2017-16530)
    
    Andrey Konovalov discovered that the USB subsystem in the Linux kernel did
    not properly validate USB interface association descriptors. A physically
    proximate attacker could use this to cause a denial of service (system
    crash). (CVE-2017-16531)
    
    Andrey Konovalov discovered that the USB subsystem in the Linux kernel did
    not properly validate USB HID descriptors. A physically proximate attacker
    could use this to cause a denial of service (system crash).
    (CVE-2017-16533)
    
    Andrey Konovalov discovered that the USB subsystem in the Linux kernel did
    not properly validate CDC metadata. A physically proximate attacker could
    use this to cause a denial of service (system crash) or possibly execute
    arbitrary code. (CVE-2017-16534)
    
    Andrey Konovalov discovered that the USB subsystem in the Linux kernel did
    not properly validate USB BOS metadata. A physically proximate attacker
    could use this to cause a denial of service (system crash).
    (CVE-2017-16535)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 14.04 LTS:
      linux-image-4.4.0-101-generic   4.4.0-101.124~14.04.1
      linux-image-4.4.0-101-generic-lpae  4.4.0-101.124~14.04.1
      linux-image-4.4.0-101-lowlatency  4.4.0-101.124~14.04.1
      linux-image-4.4.0-101-powerpc-e500mc  4.4.0-101.124~14.04.1
      linux-image-4.4.0-101-powerpc-smp  4.4.0-101.124~14.04.1
      linux-image-4.4.0-101-powerpc64-emb  4.4.0-101.124~14.04.1
      linux-image-4.4.0-101-powerpc64-smp  4.4.0-101.124~14.04.1
      linux-image-generic-lpae-lts-xenial  4.4.0.101.84
      linux-image-generic-lts-xenial  4.4.0.101.84
      linux-image-lowlatency-lts-xenial  4.4.0.101.84
      linux-image-powerpc-e500mc-lts-xenial  4.4.0.101.84
      linux-image-powerpc-smp-lts-xenial  4.4.0.101.84
      linux-image-powerpc64-emb-lts-xenial  4.4.0.101.84
      linux-image-powerpc64-smp-lts-xenial  4.4.0.101.84
    
    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://www.ubuntu.com/usn/usn-3485-2
      https://www.ubuntu.com/usn/usn-3485-1
      CVE-2017-15265, CVE-2017-15299, CVE-2017-15649, CVE-2017-15951,
      CVE-2017-16525, CVE-2017-16526, CVE-2017-16527, CVE-2017-16529,
      CVE-2017-16530, CVE-2017-16531, CVE-2017-16533, CVE-2017-16534,
      CVE-2017-16535
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-101.124~14.04.1
    
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