========================================================================= Ubuntu Security Notice USN-4419-1 July 06, 2020 linux, linux-lts-xenial, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 16.04 LTS - Ubuntu 14.04 ESM 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-kvm: Linux kernel for cloud environments - linux-raspi2: Linux kernel for Raspberry Pi (V7) systems - linux-snapdragon: Linux kernel for Qualcomm Snapdragon processors - linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty Details: It was discovered that a race condition existed in the Precision Time Protocol (PTP) implementation in the Linux kernel, leading to a use-after- free vulnerability. A local attacker could possibly use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-10690) Matthew Sheets discovered that the SELinux network label handling implementation in the Linux kernel could be coerced into de-referencing a NULL pointer. A remote attacker could use this to cause a denial of service (system crash). (CVE-2020-10711) It was discovered that the SCSI generic (sg) driver in the Linux kernel did not properly handle certain error conditions correctly. A local privileged attacker could use this to cause a denial of service (system crash). (CVE-2020-12770) It was discovered that the USB Gadget device driver in the Linux kernel did not validate arguments passed from configfs in some situations. A local attacker could possibly use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2020-13143) Shijie Luo discovered that the ext4 file system implementation in the Linux kernel did not properly check for a too-large journal size. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (soft lockup). (CVE-2020-8992) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 LTS: linux-image-4.4.0-1076-kvm 4.4.0-1076.83 linux-image-4.4.0-1110-aws 4.4.0-1110.121 linux-image-4.4.0-1135-raspi2 4.4.0-1135.144 linux-image-4.4.0-1139-snapdragon 4.4.0-1139.147 linux-image-4.4.0-185-generic 4.4.0-185.215 linux-image-4.4.0-185-generic-lpae 4.4.0-185.215 linux-image-4.4.0-185-lowlatency 4.4.0-185.215 linux-image-4.4.0-185-powerpc-e500mc 4.4.0-185.215 linux-image-4.4.0-185-powerpc-smp 4.4.0-185.215 linux-image-4.4.0-185-powerpc64-emb 4.4.0-185.215 linux-image-4.4.0-185-powerpc64-smp 4.4.0-185.215 linux-image-aws 4.4.0.1110.114 linux-image-generic 4.4.0.185.191 linux-image-generic-lpae 4.4.0.185.191 linux-image-kvm 4.4.0.1076.74 linux-image-lowlatency 4.4.0.185.191 linux-image-powerpc-e500mc 4.4.0.185.191 linux-image-powerpc-smp 4.4.0.185.191 linux-image-powerpc64-emb 4.4.0.185.191 linux-image-powerpc64-smp 4.4.0.185.191 linux-image-raspi2 4.4.0.1135.135 linux-image-snapdragon 4.4.0.1139.131 linux-image-virtual 4.4.0.185.191 Ubuntu 14.04 ESM: linux-image-4.4.0-1074-aws 4.4.0-1074.78 linux-image-4.4.0-185-generic 4.4.0-185.215~14.04.1 linux-image-4.4.0-185-generic-lpae 4.4.0-185.215~14.04.1 linux-image-4.4.0-185-lowlatency 4.4.0-185.215~14.04.1 linux-image-4.4.0-185-powerpc-e500mc 4.4.0-185.215~14.04.1 linux-image-4.4.0-185-powerpc-smp 4.4.0-185.215~14.04.1 linux-image-4.4.0-185-powerpc64-emb 4.4.0-185.215~14.04.1 linux-image-4.4.0-185-powerpc64-smp 4.4.0-185.215~14.04.1 linux-image-aws 4.4.0.1074.71 linux-image-generic-lpae-lts-xenial 4.4.0.185.162 linux-image-generic-lts-xenial 4.4.0.185.162 linux-image-lowlatency-lts-xenial 4.4.0.185.162 linux-image-powerpc-e500mc-lts-xenial 4.4.0.185.162 linux-image-powerpc-smp-lts-xenial 4.4.0.185.162 linux-image-powerpc64-emb-lts-xenial 4.4.0.185.162 linux-image-powerpc64-smp-lts-xenial 4.4.0.185.162 linux-image-virtual-lts-xenial 4.4.0.185.162 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://usn.ubuntu.com/4419-1 CVE-2020-10690, CVE-2020-10711, CVE-2020-12770, CVE-2020-13143, CVE-2020-8992 Package Information: https://launchpad.net/ubuntu/+source/linux/4.4.0-185.215 https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1110.121 https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1076.83 https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1135.144 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1139.147