Ubuntu 2336-1: Linux kernel (Trusty HWE) vulnerabilities

    Date02 Sep 2014
    CategoryUbuntu
    66
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-2336-1
    September 02, 2014
    
    linux-lts-trusty vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 12.04 LTS
    
    Summary:
    
    Several security issues were fixed in the kernel.
    
    Software Description:
    - linux-lts-trusty: Linux hardware enablement kernel from Trusty
    
    Details:
    
    A flaw was discovered in the Linux kernel virtual machine's (kvm)
    validation of interrupt requests (irq). A guest OS user could exploit this
    flaw to cause a denial of service (host OS crash). (CVE-2014-0155)
    
    Andy Lutomirski discovered a flaw in the authorization of netlink socket
    operations when a socket is passed to a process of more privilege. A local
    user could exploit this flaw to bypass access restrictions by having a
    privileged executable do something it was not intended to do.
    (CVE-2014-0181)
    
    An information leak was discovered in the Linux kernels
    aio_read_events_ring function. A local user could exploit this flaw to
    obtain potentially sensitive information from kernel memory.
    (CVE-2014-0206)
    
    A flaw was discovered in the Linux kernel's implementation of user
    namespaces with respect to inode permissions. A local user could exploit
    this flaw by creating a user namespace to gain administrative privileges.
    (CVE-2014-4014)
    
    An information leak was discovered in the rd_mcp backend of the iSCSI
    target subsystem in the Linux kernel. A local user could exploit this flaw
    to obtain sensitive information from ramdisk_mcp memory by leveraging
    access to a SCSI initiator. (CVE-2014-4027)
    
    Sasha Levin reported an issue with the Linux kernel's shared memory
    subsystem when used with range notifications and hole punching. A local
    user could exploit this flaw to cause a denial of service. (CVE-2014-4171)
    
    Toralf Förster reported an error in the Linux kernels syscall auditing on
    32 bit x86 platforms. A local user could exploit this flaw to cause a
    denial of service (OOPS and system crash). (CVE-2014-4508)
    
    An information leak was discovered in the control implemenation of the
    Advanced Linux Sound Architecture (ALSA) subsystem in the Linux kernel. A
    local user could exploit this flaw to obtain sensitive information from
    kernel memory. (CVE-2014-4652)
    
    A use-after-free flaw was discovered in the Advanced Linux Sound
    Architecture (ALSA) control implementation of the Linux kernel. A local
    user could exploit this flaw to cause a denial of service (system crash).
    (CVE-2014-4653)
    
    A authorization bug was discovered with the snd_ctl_elem_add function of
    the Advanced Linux Sound Architecture (ALSA) in the Linux kernel. A local
    user could exploit his bug to cause a denial of service (remove kernel
    controls). (CVE-2014-4654)
    
    A flaw discovered in how the snd_ctl_elem function of the Advanced Linux
    Sound Architecture (ALSA) handled a reference count. A local user could
    exploit this flaw to cause a denial of service (integer overflow and limit
    bypass). (CVE-2014-4655)
    
    An integer overflow flaw was discovered in the control implementation of
    the Advanced Linux Sound Architecture (ALSA). A local user could exploit
    this flaw to cause a denial of service (system crash). (CVE-2014-4656)
    
    An integer underflow flaw was discovered in the Linux kernel's handling of
    the backlog value for certain SCTP packets. A remote attacker could exploit
    this flaw to cause a denial of service (socket outage) via a crafted SCTP
    packet. (CVE-2014-4667)
    
    Vasily Averin discover a reference count flaw during attempts to umount in
    conjunction with a symlink. A local user could exploit this flaw to cause a
    denial of service (memory consumption or use after free) or possibly have
    other unspecified impact. (CVE-2014-5045)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 12.04 LTS:
      linux-image-3.13.0-35-generic   3.13.0-35.62~precise1
      linux-image-3.13.0-35-generic-lpae  3.13.0-35.62~precise1
    
    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. If
    you use linux-restricted-modules, you have to update that package as
    well to get modules which work with the new kernel version. Unless you
    manually uninstalled the standard kernel metapackages (e.g. linux-generic,
    linux-server, linux-powerpc), a standard system upgrade will automatically
    perform this as well.
    
    References:
      http://www.ubuntu.com/usn/usn-2336-1
      CVE-2014-0155, CVE-2014-0181, CVE-2014-0206, CVE-2014-4014,
      CVE-2014-4027, CVE-2014-4171, CVE-2014-4508, CVE-2014-4652,
      CVE-2014-4653, CVE-2014-4654, CVE-2014-4655, CVE-2014-4656,
      CVE-2014-4667, CVE-2014-5045
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-lts-trusty/3.13.0-35.62~precise1
    
    
    
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