linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
Several security issues were fixed in the Linux kernel.
Software Description
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 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)
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
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
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
Continue reading...
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 LTS
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
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 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)
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
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
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
- 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
Continue reading...
