Ubuntu 2615-1: Linux kernel (Utopic HWE) vulnerabilities

    Date20 May 2015
    CategoryUbuntu
    27
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-2615-1
    May 20, 2015
    
    linux-lts-utopic vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 14.04 LTS
    
    Summary:
    
    Several security issues were fixed in the kernel.
    
    Software Description:
    - linux-lts-utopic: Linux hardware enablement kernel from Utopic
    
    Details:
    
    Alexandre Oliva reported a race condition flaw in the btrfs file system's
    handling of extended attributes (xattrs). A local attacker could exploit
    this flaw to bypass ACLs and potentially escalate privileges.
    (CVE-2014-9710)
    
    A memory corruption issue was discovered in AES decryption when using the
    Intel AES-NI accelerated code path. A remote attacker could exploit this
    flaw to cause a denial of service (system crash) or potentially escalate
    privileges on Intel base machines with AEC-GCM mode IPSec security
    association. (CVE-2015-3331)
    
    A flaw was discovered in the Linux kernel's IPv4 networking when using TCP
    fast open to initiate a connection. An unprivileged local user could
    exploit this flaw to cause a denial of service (system crash).
    (CVE-2015-3332)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 14.04 LTS:
      linux-image-3.16.0-38-generic   3.16.0-38.52~14.04.1
      linux-image-3.16.0-38-generic-lpae  3.16.0-38.52~14.04.1
      linux-image-3.16.0-38-lowlatency  3.16.0-38.52~14.04.1
      linux-image-3.16.0-38-powerpc-e500mc  3.16.0-38.52~14.04.1
      linux-image-3.16.0-38-powerpc-smp  3.16.0-38.52~14.04.1
      linux-image-3.16.0-38-powerpc64-emb  3.16.0-38.52~14.04.1
      linux-image-3.16.0-38-powerpc64-smp  3.16.0-38.52~14.04.1
    
    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-2615-1
      CVE-2014-9710, CVE-2015-3331, CVE-2015-3332
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-38.52~14.04.1
    
    
    
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