Ubuntu 4227-2: Linux kernel (Azure) vulnerabilities

    Date 07 Jan 2020
    208
    Posted By LinuxSecurity Advisories
    Several security issues were fixed in the Linux kernel.
    ==========================================================================
    Ubuntu Security Notice USN-4227-2
    January 07, 2020
    
    linux-azure 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-azure: Linux kernel for Microsoft Azure Cloud systems
    - linux-meta-azure: Complete Linux kernel for Azure systems.
    - linux-signed-azure: Signed kernel image azure
    
    Details:
    
    USN-4227-1 fixed vulnerabilities in the Linux kernel for Ubuntu
    18.04 LTS. This update provides the corresponding updates for the
    Linux kernel for Microsoft Azure Cloud systems 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)
    
    It was discovered that the Fujitsu ES network device driver for the Linux
    kernel did not properly check for errors in some situations, leading to a
    NULL pointer dereference. A local attacker could use this to cause a denial
    of service. (CVE-2019-16231)
    
    It was discovered that the QLogic Fibre Channel driver in the Linux kernel
    did not properly check for error, leading to a NULL pointer dereference. A
    local attacker could possibly use this to cause a denial of service (system
    crash). (CVE-2019-16233)
    
    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 the Mellanox Technologies Innova driver in the Linux
    kernel did not properly deallocate memory in certain failure conditions. A
    local attacker could use this to cause a denial of service (kernel memory
    exhaustion). (CVE-2019-19045)
    
    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 AMD Display Engine Driver in the Linux kernel
    did not properly deallocate memory in certain error conditions. A local
    attack could use this to cause a denial of service (memory exhaustion).
    (CVE-2019-19083)
    
    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 Microchip CAN BUS Analyzer driver in the Linux
    kernel contained a use-after-free vulnerability on device disconnect. A
    physically proximate attacker could use this to cause a denial of service
    (system crash) or possibly execute arbitrary code. (CVE-2019-19529)
    
    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)
    
    Tristan Madani discovered that the ALSA timer implementation 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-2019-19807)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 14.04 ESM:
      linux-image-4.15.0-1066-azure   4.15.0-1066.71~14.04.1
      linux-image-azure               4.15.0.1066.52
    
    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/4227-2
      https://usn.ubuntu.com/4227-1
      CVE-2019-14895, CVE-2019-14896, CVE-2019-14897, CVE-2019-14901,
      CVE-2019-16231, CVE-2019-16233, CVE-2019-18660, CVE-2019-19045,
      CVE-2019-19052, CVE-2019-19083, CVE-2019-19524, CVE-2019-19529,
      CVE-2019-19534, CVE-2019-19807
    

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