========================================================================= Ubuntu Security Notice USN-4094-1 August 13, 2019 linux, linux-hwe, linux-azure, linux-gcp, linux-gke-4.15, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux: Linux kernel - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-gke-4.15: Linux kernel for Google Container Engine (GKE) systems - linux-kvm: Linux kernel for cloud environments - linux-oem: Linux kernel for OEM processors - linux-oracle: Linux kernel for Oracle Cloud systems - linux-raspi2: Linux kernel for Raspberry Pi 2 - linux-snapdragon: Linux kernel for Snapdragon processors - linux-azure: Linux kernel for Microsoft Azure Cloud systems - linux-hwe: Linux hardware enablement (HWE) kernel Details: It was discovered that the alarmtimer implementation in the Linux kernel contained an integer overflow vulnerability. A local attacker could use this to cause a denial of service. (CVE-2018-13053) Wen Xu discovered that the XFS filesystem implementation in the Linux kernel did not properly track inode validations. An attacker could use this to construct a malicious XFS image that, when mounted, could cause a denial of service (system crash). (CVE-2018-13093) Wen Xu discovered that the f2fs file system implementation in the Linux kernel did not properly validate metadata. An attacker could use this to construct a malicious f2fs image that, when mounted, could cause a denial of service (system crash). (CVE-2018-13097, CVE-2018-13099, CVE-2018-13100, CVE-2018-14614, CVE-2018-14616, CVE-2018-13096, CVE-2018-13098, CVE-2018-14615) Wen Xu and Po-Ning Tseng discovered that btrfs file system implementation in the Linux kernel did not properly validate metadata. An attacker could use this to construct a malicious btrfs image that, when mounted, could cause a denial of service (system crash). (CVE-2018-14610, CVE-2018-14611, CVE-2018-14612, CVE-2018-14613, CVE-2018-14609) Wen Xu discovered that the HFS+ filesystem implementation in the Linux kernel did not properly handle malformed catalog data in some situations. An attacker could use this to construct a malicious HFS+ image that, when mounted, could cause a denial of service (system crash). (CVE-2018-14617) Vasily Averin and Pavel Tikhomirov discovered that the cleancache subsystem of the Linux kernel did not properly initialize new files in some situations. A local attacker could use this to expose sensitive information. (CVE-2018-16862) Hui Peng and Mathias Payer discovered that the USB subsystem in the Linux kernel did not properly handle size checks when handling an extra USB descriptor. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2018-20169) It was discovered that a use-after-free error existed in the block layer subsystem of the Linux kernel when certain failure conditions occurred. A local attacker could possibly use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-20856) Eli Biham and Lior Neumann discovered that the Bluetooth implementation in the Linux kernel did not properly validate elliptic curve parameters during Diffie-Hellman key exchange in some situations. An attacker could use this to expose sensitive information. (CVE-2018-5383) It was discovered that a heap buffer overflow existed in the Marvell Wireless LAN device driver for the Linux kernel. An attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-10126) Andrei Vlad Lutas and Dan Lutas discovered that some x86 processors incorrectly handle SWAPGS instructions during speculative execution. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2019-1125) It was discovered that the PowerPC dlpar implementation in the Linux kernel did not properly check for allocation errors in some situations. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2019-12614) It was discovered that a NULL pointer dereference vulnerabilty existed in the Near-field communication (NFC) implementation in the Linux kernel. An attacker could use this to cause a denial of service (system crash). (CVE-2019-12818) It was discovered that the MDIO bus devices subsystem in the Linux kernel improperly dropped a device reference in an error condition, leading to a use-after-free. An attacker could use this to cause a denial of service (system crash). (CVE-2019-12819) It was discovered that a NULL pointer dereference vulnerability existed in the Near-field communication (NFC) implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2019-12984) Jann Horn discovered a use-after-free vulnerability in the Linux kernel when accessing LDT entries in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-13233) Jann Horn discovered that the ptrace implementation in the Linux kernel did not properly record credentials in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly gain administrative privileges. (CVE-2019-13272) It was discovered that the Empia EM28xx DVB USB device driver implementation in the Linux kernel contained a use-after-free vulnerability when disconnecting the device. An attacker could use this to cause a denial of service (system crash). (CVE-2019-2024) It was discovered that the USB video device class implementation in the Linux kernel did not properly validate control bits, resulting in an out of bounds buffer read. A local attacker could use this to possibly expose sensitive information (kernel memory). (CVE-2019-2101) It was discovered that the Marvell Wireless LAN device driver in the Linux kernel did not properly validate the BSS descriptor. A local attacker could possibly use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-3846) It was discovered that the Appletalk IP encapsulation driver in the Linux kernel did not properly prevent kernel addresses from being copied to user space. A local attacker with the CAP_NET_ADMIN capability could use this to expose sensitive information. (CVE-2018-20511) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS: linux-image-4.15.0-1021-oracle 4.15.0-1021.23 linux-image-4.15.0-1040-gcp 4.15.0-1040.42 linux-image-4.15.0-1040-gke 4.15.0-1040.42 linux-image-4.15.0-1042-kvm 4.15.0-1042.42 linux-image-4.15.0-1043-raspi2 4.15.0-1043.46 linux-image-4.15.0-1050-oem 4.15.0-1050.57 linux-image-4.15.0-1060-snapdragon 4.15.0-1060.66 linux-image-4.15.0-58-generic 4.15.0-58.64 linux-image-4.15.0-58-generic-lpae 4.15.0-58.64 linux-image-4.15.0-58-lowlatency 4.15.0-58.64 linux-image-gcp 4.15.0.1040.42 linux-image-generic 4.15.0.58.60 linux-image-generic-lpae 4.15.0.58.60 linux-image-gke 4.15.0.1040.43 linux-image-gke-4.15 4.15.0.1040.43 linux-image-kvm 4.15.0.1042.42 linux-image-lowlatency 4.15.0.58.60 linux-image-oem 4.15.0.1050.54 linux-image-oracle 4.15.0.1021.24 linux-image-powerpc-e500mc 4.15.0.58.60 linux-image-powerpc-smp 4.15.0.58.60 linux-image-powerpc64-emb 4.15.0.58.60 linux-image-powerpc64-smp 4.15.0.58.60 linux-image-raspi2 4.15.0.1043.41 linux-image-snapdragon 4.15.0.1060.63 linux-image-virtual 4.15.0.58.60 Ubuntu 16.04 LTS: linux-image-4.15.0-1021-oracle 4.15.0-1021.23~16.04.1 linux-image-4.15.0-1040-gcp 4.15.0-1040.42~16.04.1 linux-image-4.15.0-1055-azure 4.15.0-1055.60 linux-image-4.15.0-58-generic 4.15.0-58.64~16.04.1 linux-image-4.15.0-58-generic-lpae 4.15.0-58.64~16.04.1 linux-image-4.15.0-58-lowlatency 4.15.0-58.64~16.04.1 linux-image-azure 4.15.0.1055.58 linux-image-gcp 4.15.0.1040.54 linux-image-generic-hwe-16.04 4.15.0.58.79 linux-image-generic-lpae-hwe-16.04 4.15.0.58.79 linux-image-gke 4.15.0.1040.54 linux-image-lowlatency-hwe-16.04 4.15.0.58.79 linux-image-oem 4.15.0.58.79 linux-image-oracle 4.15.0.1021.15 linux-image-virtual-hwe-16.04 4.15.0.58.79 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/4094-1 CVE-2018-13053, CVE-2018-13093, CVE-2018-13096, CVE-2018-13097, CVE-2018-13098, CVE-2018-13099, CVE-2018-13100, CVE-2018-14609, CVE-2018-14610, CVE-2018-14611, CVE-2018-14612, CVE-2018-14613, CVE-2018-14614, CVE-2018-14615, CVE-2018-14616, CVE-2018-14617, CVE-2018-16862, CVE-2018-20169, CVE-2018-20511, CVE-2018-20856, CVE-2018-5383, CVE-2019-10126, CVE-2019-1125, CVE-2019-12614, CVE-2019-12818, CVE-2019-12819, CVE-2019-12984, CVE-2019-13233, CVE-2019-13272, CVE-2019-2024, CVE-2019-2101, CVE-2019-3846 Package Information: https://launchpad.net/ubuntu/+source/linux/4.15.0-58.64 https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1040.42 https://launchpad.net/ubuntu/+source/linux-gke-4.15/4.15.0-1040.42 https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1042.42 https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1050.57 https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1021.23 https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1043.46 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1060.66 https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1055.60 https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1040.42~16.04.1 https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-58.64~16.04.1 https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1021.23~16.04.1