Ubuntu 2965-4: Linux kernel (Qualcomm Snapdragon) vulnerability

    Date06 May 2016
    CategoryUbuntu
    68
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-2965-4
    May 06, 2016
    
    linux-snapdragon vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 16.04 LTS
    
    Summary:
    
    Several security issues were fixed in the kernel.
    
    Software Description:
    - linux-snapdragon: Linux kernel for Snapdragon Processors
    
    Details:
    
    Jann Horn discovered that the extended Berkeley Packet Filter (eBPF)
    implementation in the Linux kernel did not properly reference count file
    descriptors, leading to a use-after-free. A local unprivileged attacker
    could use this to gain administrative privileges.
    
    Ralf Spenneberg discovered that the USB sound subsystem in the Linux kernel
    did not properly validate USB device descriptors. An attacker with physical
    access could use this to cause a denial of service (system crash).
    (CVE-2016-2184)
    
    Ralf Spenneberg discovered that the ATI Wonder Remote II USB driver in the
    Linux kernel did not properly validate USB device descriptors. An attacker
    with physical access could use this to cause a denial of service (system
    crash). (CVE-2016-2185)
    
    Ralf Spenneberg discovered that the PowerMate USB driver in the Linux
    kernel did not properly validate USB device descriptors. An attacker with
    physical access could use this to cause a denial of service (system crash).
    (CVE-2016-2186)
    
    Ralf Spenneberg discovered that the I/O-Warrior USB device driver in the
    Linux kernel did not properly validate USB device descriptors. An attacker
    with physical access could use this to cause a denial of service (system
    crash). (CVE-2016-2188)
    
    Sergej Schumilo, Hendrik Schwartke, and Ralf Spenneberg discovered that the
    MCT USB RS232 Converter device driver in the Linux kernel did not properly
    validate USB device descriptors. An attacker with physical access could use
    this to cause a denial of service (system crash). (CVE-2016-3136)
    
    Sergej Schumilo, Hendrik Schwartke, and Ralf Spenneberg discovered that the
    Cypress M8 USB device driver in the Linux kernel did not properly validate
    USB device descriptors. An attacker with physical access could use this to
    cause a denial of service (system crash). (CVE-2016-3137)
    
    Sergej Schumilo, Hendrik Schwartke, and Ralf Spenneberg discovered that the
    USB abstract device control driver for modems and ISDN adapters did not
    validate endpoint descriptors. An attacker with physical access could use
    this to cause a denial of service (system crash). (CVE-2016-3138)
    
    Sergej Schumilo, Hendrik Schwartke, and Ralf Spenneberg discovered that the
    Linux kernel's USB driver for Digi AccelePort serial converters did not
    properly validate USB device descriptors. An attacker with physical access
    could use this to cause a denial of service (system crash). (CVE-2016-3140)
    
    It was discovered that the IPv4 implementation in the Linux kernel did not
    perform the destruction of inet device objects properly. An attacker in a
    guest OS could use this to cause a denial of service (networking outage) in
    the host OS. (CVE-2016-3156)
    
    Andy Lutomirski discovered that the Linux kernel did not properly context-
    switch IOPL on 64-bit PV Xen guests. An attacker in a guest OS could use
    this to cause a denial of service (guest OS crash), gain privileges, or
    obtain sensitive information. (CVE-2016-3157)
    
    Hector Marco and Ismael Ripoll discovered that the Linux kernel would
    improperly disable Address Space Layout Randomization (ASLR) for x86
    processes running in 32 bit mode if stack-consumption resource limits were
    disabled. A local attacker could use this to make it easier to exploit an
    existing vulnerability in a setuid/setgid program. (CVE-2016-3672)
    
    It was discovered that the Linux kernel's USB driver for IMS Passenger
    Control Unit devices did not properly validate the device's interfaces. An
    attacker with physical access could use this to cause a denial of service
    (system crash). (CVE-2016-3689)
    
    Andrey Konovalov discovered that the CDC Network Control Model USB driver
    in the Linux kernel did not cancel work events queued if a later error
    occurred, resulting in a use-after-free. An attacker with physical access
    could use this to cause a denial of service (system crash). (CVE-2016-3951)
    
    It was discovered that an out-of-bounds write could occur when handling
    incoming packets in the USB/IP implementation in the Linux kernel. A remote
    attacker could use this to cause a denial of service (system crash) or
    possibly execute arbitrary code. (CVE-2016-3955)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 16.04 LTS:
      linux-image-4.4.0-1013-snapdragon  4.4.0-1013.14
    
    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-2965-4
      http://www.ubuntu.com/usn/usn-2965-1
      CVE-2016-2184, CVE-2016-2185, CVE-2016-2186, CVE-2016-2188,
      CVE-2016-3136, CVE-2016-3137, CVE-2016-3138, CVE-2016-3140,
      CVE-2016-3156, CVE-2016-3157, CVE-2016-3672, CVE-2016-3689,
      CVE-2016-3951, CVE-2016-3955, CVE-2016-4557
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1013.14
    
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