========================================================================== Ubuntu Security Notice USN-3485-1 November 21, 2017 linux, linux-aws, linux-gke, linux-kvm, 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-aws: Linux kernel for Amazon Web Services (AWS) systems - linux-gke: Linux kernel for Google Container Engine (GKE) systems - linux-kvm: Linux kernel for cloud environments - linux-raspi2: Linux kernel for Raspberry Pi 2 - linux-snapdragon: Linux kernel for Snapdragon processors Details: It was discovered that a race condition existed in the ALSA subsystem of the Linux kernel when creating and deleting a port via ioctl(). A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-15265) Eric Biggers discovered that the key management subsystem in the Linux kernel did not properly restrict adding a key that already exists but is uninstantiated. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-15299) It was discovered that a race condition existed in the packet fanout implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-15649) Eric Biggers discovered a race condition in the key management subsystem of the Linux kernel around keys in a negative state. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-15951) Andrey Konovalov discovered a use-after-free vulnerability in the USB serial console driver in the Linux kernel. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-16525) Andrey Konovalov discovered that the Ultra Wide Band driver in the Linux kernel did not properly check for an error condition. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-16526) Andrey Konovalov discovered that the ALSA subsystem in the Linux kernel contained a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-16527) Andrey Konovalov discovered that the ALSA subsystem in the Linux kernel did not properly validate USB audio buffer descriptors. A physically proximate attacker could use this cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-16529) Andrey Konovalov discovered that the USB unattached storage driver in the Linux kernel contained out-of-bounds error when handling alternative settings. A physically proximate attacker could use to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-16530) Andrey Konovalov discovered that the USB subsystem in the Linux kernel did not properly validate USB interface association descriptors. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2017-16531) Andrey Konovalov discovered that the USB subsystem in the Linux kernel did not properly validate USB HID descriptors. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2017-16533) Andrey Konovalov discovered that the USB subsystem in the Linux kernel did not properly validate CDC metadata. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-16534) Andrey Konovalov discovered that the USB subsystem in the Linux kernel did not properly validate USB BOS metadata. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2017-16535) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 LTS: linux-image-4.4.0-101-generic 4.4.0-101.124 linux-image-4.4.0-101-generic-lpae 4.4.0-101.124 linux-image-4.4.0-101-lowlatency 4.4.0-101.124 linux-image-4.4.0-101-powerpc-e500mc 4.4.0-101.124 linux-image-4.4.0-101-powerpc-smp 4.4.0-101.124 linux-image-4.4.0-101-powerpc64-emb 4.4.0-101.124 linux-image-4.4.0-101-powerpc64-smp 4.4.0-101.124 linux-image-4.4.0-1010-kvm 4.4.0-1010.15 linux-image-4.4.0-1034-gke 4.4.0-1034.34 linux-image-4.4.0-1041-aws 4.4.0-1041.50 linux-image-4.4.0-1077-raspi2 4.4.0-1077.85 linux-image-4.4.0-1079-snapdragon 4.4.0-1079.84 linux-image-aws 4.4.0.1041.43 linux-image-generic 4.4.0.101.106 linux-image-generic-lpae 4.4.0.101.106 linux-image-gke 4.4.0.1034.35 linux-image-kvm 4.4.0.1010.10 linux-image-lowlatency 4.4.0.101.106 linux-image-powerpc-e500mc 4.4.0.101.106 linux-image-powerpc-smp 4.4.0.101.106 linux-image-powerpc64-emb 4.4.0.101.106 linux-image-powerpc64-smp 4.4.0.101.106 linux-image-raspi2 4.4.0.1077.77 linux-image-snapdragon 4.4.0.1079.71 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://www.ubuntu.com/usn/usn-3485-1 CVE-2017-15265, CVE-2017-15299, CVE-2017-15649, CVE-2017-15951, CVE-2017-16525, CVE-2017-16526, CVE-2017-16527, CVE-2017-16529, CVE-2017-16530, CVE-2017-16531, CVE-2017-16533, CVE-2017-16534, CVE-2017-16535 Package Information: https://launchpad.net/ubuntu/+source/linux/4.4.0-101.124 https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1041.50 https://launchpad.net/ubuntu/+source/linux-gke/4.4.0-1034.34 https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1010.15 https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1077.85 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1079.84