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========================================================================== Ubuntu Security Notice USN-3265-1 April 25, 2017
linux, linux-aws, linux-gke, 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 kernel.
Software Description: - linux: Linux kernel - linux-aws: Linux kernel for Amazon Web Services (AWS) systems - linux-gke: Linux kernel for Google Container Engine (GKE) systems - linux-raspi2: Linux kernel for Raspberry Pi 2 - linux-snapdragon: Linux kernel for Snapdragon Processors
Details:
It was discovered that a use-after-free flaw existed in the filesystem encryption subsystem in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-7374)
Andrey Konovalov discovered an out-of-bounds access in the IPv6 Generic Routing Encapsulation (GRE) tunneling implementation in the Linux kernel. An attacker could use this to possibly expose sensitive information. (CVE-2017-5897)
Andrey Konovalov discovered that the IPv4 implementation in the Linux kernel did not properly handle invalid IP options in some situations. An attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2017-5970)
Gareth Evans discovered that the shm IPC subsystem in the Linux kernel did not properly restrict mapping page zero. A local privileged attacker could use this to execute arbitrary code. (CVE-2017-5669)
Alexander Popov discovered that a race condition existed in the Stream Control Transmission Protocol (SCTP) implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-5986)
Dmitry Vyukov discovered that the Linux kernel did not properly handle TCP packets with the URG flag. A remote attacker could use this to cause a denial of service. (CVE-2017-6214)
Andrey Konovalov discovered that the LLC subsytem in the Linux kernel did not properly set up a destructor in certain situations. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-6345)
It was discovered that a race condition existed in the AF_PACKET handling code in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-6346)
Andrey Konovalov discovered that the IP layer in the Linux kernel made improper assumptions about internal data layout when performing checksums. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-6347)
Dmitry Vyukov discovered race conditions in the Infrared (IrDA) subsystem in the Linux kernel. A local attacker could use this to cause a denial of service (deadlock). (CVE-2017-6348)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 16.04 LTS: linux-image-4.4.0-1012-gke 4.4.0-1012.12 linux-image-4.4.0-1016-aws 4.4.0-1016.25 linux-image-4.4.0-1054-raspi2 4.4.0-1054.61 linux-image-4.4.0-1057-snapdragon 4.4.0-1057.61 linux-image-4.4.0-75-generic 4.4.0-75.96 linux-image-4.4.0-75-generic-lpae 4.4.0-75.96 linux-image-4.4.0-75-lowlatency 4.4.0-75.96 linux-image-4.4.0-75-powerpc-e500mc 4.4.0-75.96 linux-image-4.4.0-75-powerpc-smp 4.4.0-75.96 linux-image-4.4.0-75-powerpc64-smp 4.4.0-75.96 linux-image-aws 4.4.0.1016.19 linux-image-generic 4.4.0.75.81 linux-image-generic-lpae 4.4.0.75.81 linux-image-gke 4.4.0.1012.14 linux-image-lowlatency 4.4.0.75.81 linux-image-powerpc-e500mc 4.4.0.75.81 linux-image-powerpc-smp 4.4.0.75.81 linux-image-powerpc64-smp 4.4.0.75.81 linux-image-raspi2 4.4.0.1054.55 linux-image-snapdragon 4.4.0.1057.50
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: http://www.ubuntu.com/usn/usn-3265-1 CVE-2017-5669, CVE-2017-5897, CVE-2017-5970, CVE-2017-5986, CVE-2017-6214, CVE-2017-6345, CVE-2017-6346, CVE-2017-6347, CVE-2017-6348, CVE-2017-7374
Package Information: https://launchpad.net/ubuntu/+source/linux/4.4.0-75.96 https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1016.25 https://launchpad.net/ubuntu/+source/linux-gke/4.4.0-1012.12 https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1054.61 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1057.61
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