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Ubuntu 16.04 LTS: USN-3364-1 Critical: Kernel Info Exposure and DoS

Several security issues were fixed in the Linux kernel.. =========================================================================Ubuntu Security Notice USN-3364-1 July 24, 2017 linux, linux-raspi2, linux-snapdragon vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 16.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux: Linux kernel - linux-raspi2: Linux kernel for Raspberry Pi 2 - linux-snapdragon: Linux kernel for Snapdragon processors Details: It was discovered that the Linux kernel did not properly initialize a Wake- on-Lan data structure. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2014-9900) It was discovered that the Linux kernel did not properly restrict access to /proc/iomem. A local attacker could use this to expose sensitive information. (CVE-2015-8944) Alexander Potapenko discovered a race condition in the Advanced Linux Sound Architecture (ALSA) subsystem in the Linux kernel. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2017-1000380) Li Qiang discovered that the DRM driver for VMware Virtual GPUs in the Linux kernel did not properly validate some ioctl arguments. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-7346) Jann Horn discovered that bpf in Linux kernel does not restrict the output of the print_bpf_insn function. A local attacker could use this to obtain sensitive address information. (CVE-2017-9150) Murray McAllister discovered that the DRM driver for VMware Virtual GPUs in the Linux kernel did not properly initialize memory. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2017-9605) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 LTS: linux-image-4.4.0-1065-raspi2 4.4.0-1065.73 linux-image-4.4.0-1067-snapdragon 4.4.0-1067.72 linux-image-4.4.0-87-generic 4.4.0-87.110 linux-image-4.4.0-87-generic-lpae 4.4.0-87.110 linux-image-4.4.0-87-lowlatency 4.4.0-87.110 linux-image-4.4.0-87-powerpc-e500mc 4.4.0-87.110 linux-image-4.4.0-87-powerpc-smp 4.4.0-87.110 linux-image-4.4.0-87-powerpc64-emb 4.4.0-87.110 linux-image-4.4.0-87-powerpc64-smp 4.4.0-87.110 linux-image-generic 4.4.0.87.93 linux-image-generic-lpae 4.4.0.87.93 linux-image-lowlatency 4.4.0.87.93 linux-image-powerpc-e500mc 4.4.0.87.93 linux-image-powerpc-smp 4.4.0.87.93 linux-image-powerpc64-emb 4.4.0.87.93 linux-image-powerpc64-smp 4.4.0.87.93 linux-image-raspi2 4.4.0.1065.66 linux-image-snapdragon 4.4.0.1067.60 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://ubuntu.com/security/notices/USN-3364-1 CVE-2014-9900, CVE-2015-8944, CVE-2017-1000380, CVE-2017-7346, CVE-2017-9150, CVE-2017-9605 Package Information: https://launchpad.net/ubuntu/+source/linux/4.4.0-87.110 https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1065.73 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1067.72 . Updates for Ubuntu Security Notice USN-3364-1 addressing kernel issues disrupting sensitive data access and Denial of Service risks.. Kernel Update Advisory, Ubuntu Security Notice, Linux Kernel Fix. . Severity: Critical. LinuxSecurity.com Team

Jul 24, 2017 •Critical Ubuntu