============================================================================ 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