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172
security advisoryDoSUbuntuUbuntu 18.04 LTS USN-4285-1: Critical Kernel Memory Management Issues
Several security issues were fixed in the Linux kernel.. =========================================================================Ubuntu Security Notice USN-4285-1 February 18, 2020 linux-aws-5.0, linux-azure, linux-gcp, linux-gke-5.0, linux-oracle-5.0 vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 18.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-aws-5.0: Linux kernel for Amazon Web Services (AWS) systems - linux-azure: Linux kernel for Microsoft Azure Cloud systems - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-gke-5.0: Linux kernel for Google Container Engine (GKE) systems - linux-oracle-5.0: Linux kernel for Oracle Cloud systems Details: It was discovered that the Linux kernel did not properly clear data structures on context switches for certain Intel graphics processors. A local attacker could use this to expose sensitive information. (CVE-2019-14615) It was discovered that the HSA Linux kernel driver for AMD GPU devices did not properly check for errors in certain situations, leading to a NULL pointer dereference. A local attacker could possibly use this to cause a denial of service. (CVE-2019-16229) It was discovered that the Marvell 8xxx Libertas WLAN device driver in the Linux kernel did not properly check for errors in certain situations, leading to a NULL pointer dereference. A local attacker could possibly use this to cause a denial of service. (CVE-2019-16232) It was discovered that the Renesas Digital Radio Interface (DRIF) driver in the Linux kernel did not properly initialize data. A local attacker could possibly use this to expose sensitive information (kernel memory) (CVE-2019-18786). It was discovered that the Afatech AF9005 DVB-T USB device driver in the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could possibly use this tocause a denial of service (kernel memory exhaustion). (CVE-2019-18809) It was discovered that multiple memory leaks existed in the Marvell WiFi-Ex Driver for the Linux kernel. A local attacker could possibly use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19057) It was discovered that the Realtek rtlwifi USB device driver in the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could possibly use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19063) It was discovered that the Kvaser CAN/USB driver in the Linux kernel did not properly initialize memory in certain situations. A local attacker could possibly use this to expose sensitive information (kernel memory). (CVE-2019-19947) Gao Chuan discovered that the SAS Class driver in the Linux kernel contained a race condition that could lead to a NULL pointer dereference. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2019-19965) It was discovered that the Datagram Congestion Control Protocol (DCCP) implementation in the Linux kernel did not properly deallocate memory in certain error conditions. An attacker could possibly use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-20096) Mitchell Frank discovered that the Wi-Fi implementation in the Linux kernel when used as an access point would send IAPP location updates for stations before client authentication had completed. A physically proximate attacker could use this to cause a denial of service. (CVE-2019-5108) It was discovered that a race condition can lead to a use-after-free while destroying GEM contexts in the i915 driver for the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-7053) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS: linux-image-5.0.0-1011-oracle 5.0.0-1011.16 linux-image-5.0.0-1025-aws 5.0.0-1025.28 linux-image-5.0.0-1030-gke 5.0.0-1030.31 linux-image-5.0.0-1031-gcp 5.0.0-1031.32 linux-image-5.0.0-1032-azure 5.0.0-1032.34 linux-image-azure 5.0.0.1032.43 linux-image-gcp 5.0.0.1031.35 linux-image-gke-5.0 5.0.0.1030.18 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-4285-1 CVE-2019-14615, CVE-2019-16229, CVE-2019-16232, CVE-2019-18786, CVE-2019-18809, CVE-2019-19057, CVE-2019-19063, CVE-2019-19947, CVE-2019-19965, CVE-2019-20096, CVE-2019-5108, CVE-2020-7053 Package Information: https://launchpad.net/ubuntu/+source/linux-aws-5.0/5.0.0-1025.28 https://launchpad.net/ubuntu/+source/linux-azure/5.0.0-1032.34 https://launchpad.net/ubuntu/+source/linux-gcp/5.0.0-1031.32 https://launchpad.net/ubuntu/+source/linux-gke-5.0/5.0.0-1030.31 https://launchpad.net/ubuntu/+source/linux-oracle-5.0/5.0.0-1011.16 . Uncover essential security updates in Ubuntu's kernel concerning memory control and peripheral drivers. Act promptly!. Kernel Updates, Ubuntu Security, Linux Vulnerability Management. . Severity: Critical. LinuxSecurity.com Team
Feb 18, 2020
•Critical
Ubuntu
172
security advisorydenial of servicememory leakUbuntu 16.04 LTS: USN-4255-2 Critical: Linux Kernel Security Fixes
Several security issues were fixed in the Linux kernel.. =========================================================================Ubuntu Security Notice USN-4255-2 January 28, 2020 linux-hwe, linux-aws-hwe 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-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems - linux-hwe: Linux hardware enablement (HWE) kernel Details: USN-4255-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 18.04 LTS for Ubuntu 16.04 LTS. It was discovered that the Linux kernel did not properly clear data structures on context switches for certain Intel graphics processors. A local attacker could use this to expose sensitive information. (CVE-2019-14615) It was discovered that a race condition can lead to a use-after-free while destroying GEM contexts in the i915 driver for the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-7053) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 LTS: linux-image-4.15.0-1058-aws 4.15.0-1058.60~16.04.1 linux-image-4.15.0-76-generic 4.15.0-76.86~16.04.1 linux-image-4.15.0-76-generic-lpae 4.15.0-76.86~16.04.1 linux-image-4.15.0-76-lowlatency 4.15.0-76.86~16.04.1 linux-image-aws-hwe 4.15.0.1058.58 linux-image-generic-hwe-16.04 4.15.0.76.96 linux-image-generic-lpae-hwe-16.04 4.15.0.76.96 linux-image-lowlatency-hwe-16.04 4.15.0.76.96 linux-image-oem 4.15.0.76.96 linux-image-virtual-hwe-16.04 4.15.0.76.96 After a standard system update you need to reboot your computer to make all thenecessary 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-4255-2 https://ubuntu.com/security/notices/USN-4255-1 CVE-2019-14615, CVE-2020-7053 Package Information: https://launchpad.net/ubuntu/+source/linux-aws-hwe/4.15.0-1058.60~16.04.1 https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-76.86~16.04.1 . Multiple vulnerabilities in the Linux kernel affecting Ubuntu 16.04 LTS have been remedied in USN-4255-2. Detailed update instructions are provided.. Linux Kernel, Ubuntu Security, AWS HWE, Security Updates. . Severity: Critical. LinuxSecurity.com Team
Jan 28, 2020
•Critical
Ubuntu
172
security advisoryDoSUbuntuUbuntu 16.04 LTS: USN-4254-1 Critical: Kernel Context Switch Issues
Several security issues were fixed in the Linux kernel.. =========================================================================Ubuntu Security Notice USN-4254-1 January 28, 2020 linux, linux-aws, 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-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 the Linux kernel did not properly clear data structures on context switches for certain Intel graphics processors. A local attacker could use this to expose sensitive information. (CVE-2019-14615) It was discovered that a race condition existed in the Virtual Video Test Driver in the Linux kernel. An attacker with write access to /dev/video0 on a system with the vivid module loaded could possibly use this to gain administrative privileges. (CVE-2019-18683) It was discovered that the btrfs file system in the Linux kernel did not properly validate metadata, leading to a NULL pointer dereference. An attacker could use this to specially craft a file system image that, when mounted, could cause a denial of service (system crash). (CVE-2019-18885) It was discovered that multiple memory leaks existed in the Marvell WiFi-Ex Driver for the Linux kernel. A local attacker could possibly use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19057) It was discovered that the crypto subsystem in the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19062) It was discovered that the Realtek rtlwifi USBdevice driver in the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could possibly use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19063) Dan Carpenter discovered that the AppleTalk networking subsystem of the Linux kernel did not properly handle certain error conditions, leading to a NULL pointer dereference. A local attacker could use this to cause a denial of service (system crash). (CVE-2019-19227) It was discovered that the KVM hypervisor implementation in the Linux kernel did not properly handle ioctl requests to get emulated CPUID features. An attacker with access to /dev/kvm could use this to cause a denial of service (system crash). (CVE-2019-19332) It was discovered that the B2C2 FlexCop USB device driver in the Linux kernel did not properly validate device metadata. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2019-15291) 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-kvm 4.4.0-1065.72 linux-image-4.4.0-1101-aws 4.4.0-1101.112 linux-image-4.4.0-1128-raspi2 4.4.0-1128.137 linux-image-4.4.0-1132-snapdragon 4.4.0-1132.140 linux-image-4.4.0-173-generic 4.4.0-173.203 linux-image-4.4.0-173-generic-lpae 4.4.0-173.203 linux-image-4.4.0-173-lowlatency 4.4.0-173.203 linux-image-4.4.0-173-powerpc-e500mc 4.4.0-173.203 linux-image-4.4.0-173-powerpc-smp 4.4.0-173.203 linux-image-4.4.0-173-powerpc64-emb 4.4.0-173.203 linux-image-4.4.0-173-powerpc64-smp 4.4.0-173.203 linux-image-aws 4.4.0.1101.105 linux-image-generic 4.4.0.173.181 linux-image-generic-lpae 4.4.0.173.181 linux-image-kvm 4.4.0.1065.65 linux-image-lowlatency 4.4.0.173.181 linux-image-powerpc-e500mc 4.4.0.173.181 linux-image-powerpc-smp 4.4.0.173.181 linux-image-powerpc64-emb 4.4.0.173.181 linux-image-powerpc64-smp 4.4.0.173.181 linux-image-raspi2 4.4.0.1128.128 linux-image-snapdragon 4.4.0.1132.124 linux-image-virtual 4.4.0.173.181 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-4254-1 CVE-2019-14615, CVE-2019-15291, CVE-2019-18683, CVE-2019-18885, CVE-2019-19057, CVE-2019-19062, CVE-2019-19063, CVE-2019-19227, CVE-2019-19332 Package Information: https://launchpad.net/ubuntu/+source/linux/4.4.0-173.203 https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1101.112 https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1065.72 https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1128.137 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1132.140 . Take immediate action on urgent kernel vulnerabilities in Ubuntu with the latest patches to improve both system resilience and protection.. Linux Kernel Issues, Ubuntu Security Notice, Kernel Update Instructions. . Severity: Critical. LinuxSecurity.com Team
Jan 27, 2020
•Critical
Ubuntu
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