Ubuntu 3343-2: Linux kernel (Trusty HWE) vulnerabilities

    Date29 Jun 2017
    CategoryUbuntu
    48
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the Linux kernel.
    ==========================================================================
    Ubuntu Security Notice USN-3343-2
    June 29, 2017
    
    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
    
    Details:
    
    USN 3343-1 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.
    
    USN 3335-2 fixed a vulnerability in the Linux kernel. However, that
    fix introduced regressions for some Java applications. This update
    addresses the issue. We apologize for the inconvenience.
    
    It was discovered that a use-after-free vulnerability in the core voltage
    regulator driver of the Linux kernel. A local attacker could use this to
    cause a denial of service or possibly execute arbitrary code.
    (CVE-2014-9940)
    
    It was discovered that a buffer overflow existed in the trace subsystem in
    the Linux kernel. A privileged local attacker could use this to execute
    arbitrary code. (CVE-2017-0605)
    
    Roee Hay discovered that the parallel port printer driver in the Linux
    kernel did not properly bounds check passed arguments. A local attacker
    with write access to the kernel command line arguments could use this to
    execute arbitrary code. (CVE-2017-1000363)
    
    Li Qiang discovered that an integer overflow vulnerability existed in the
    Direct Rendering Manager (DRM) driver for VMWare devices in the Linux
    kernel. A local attacker could use this to cause a denial of service
    (system crash) or possibly execute arbitrary code. (CVE-2017-7294)
    
    It was discovered that a double-free vulnerability existed in the IPv4
    stack of the Linux kernel. An attacker could use this to cause a denial of
    service (system crash). (CVE-2017-8890)
    
    Andrey Konovalov discovered an IPv6 out-of-bounds read error in the Linux
    kernel's IPv6 stack. A local attacker could cause a denial of service or
    potentially other unspecified problems. (CVE-2017-9074)
    
    Andrey Konovalov discovered a flaw in the handling of inheritance in the
    Linux kernel's IPv6 stack. A local user could exploit this issue to cause a
    denial of service or possibly other unspecified problems. (CVE-2017-9075)
    
    It was discovered that dccp v6 in the Linux kernel mishandled inheritance.
    A local attacker could exploit this issue to cause a denial of service or
    potentially other unspecified problems. (CVE-2017-9076)
    
    It was discovered that the transmission control protocol (tcp) v6 in the
    Linux kernel mishandled inheritance. A local attacker could exploit this
    issue to cause a denial of service or potentially other unspecified
    problems. (CVE-2017-9077)
    
    It was discovered that the IPv6 stack in the Linux kernel was performing
    its over write consistency check after the data was actually overwritten. A
    local attacker could exploit this flaw to cause a denial of service (system
    crash). (CVE-2017-9242)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 12.04 ESM:
      linux-image-3.13.0-123-generic  3.13.0-123.172~precise1
      linux-image-3.13.0-123-generic-lpae  3.13.0-123.172~precise1
      linux-image-generic-lpae-lts-trusty  3.13.0.123.114
      linux-image-generic-lts-trusty  3.13.0.123.114
    
    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-3343-2
      https://www.ubuntu.com/usn/usn-3343-1
      https://www.ubuntu.com/usn/usn-3335-2
      https://launchpad.net/bugs/1699772
      CVE-2014-9940, CVE-2017-0605, CVE-2017-1000363, CVE-2017-7294,
      CVE-2017-8890, CVE-2017-9074, CVE-2017-9075, CVE-2017-9076,
      CVE-2017-9077, CVE-2017-9242
    
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