USN-4163-1: Linux kernel vulnerabilities
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 a race condition existed in the ARC EMAC ethernet driver for the Linux kernel, resulting in a use-after-free vulnerability. An attacker could use this to cause a denial of service (system crash). (CVE-2016-10906)
It was discovered that a race condition existed in the Serial Attached SCSI (SAS) implementation in the Linux kernel when handling certain error conditions. A local attacker could use this to cause a denial of service (kernel deadlock). (CVE-2017-18232)
It was discovered that the RSI 91x Wi-Fi driver in the Linux kernel did not did not handle detach operations correctly, leading to a use-after-free vulnerability. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-21008)
Wen Huang discovered that the Marvell Wi-Fi device driver in the Linux kernel did not properly perform bounds checking, leading to a heap overflow. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-14814, CVE-2019-14816)
Matt Delco discovered that the KVM hypervisor implementation in the Linux kernel did not properly perform bounds checking when handling coalesced MMIO write operations. A local attacker with write access to /dev/kvm could use this to cause a denial of service (system crash). (CVE-2019-14821)
Hui Peng and Mathias Payer discovered that the USB audio driver for the Linux kernel did not properly validate device meta data. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2019-15117)
Hui Peng and Mathias Payer discovered that the USB audio driver for the Linux kernel improperly performed recursion while handling device meta data. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2019-15118)
It was discovered that the Technisat DVB-S/S2 USB device driver in the Linux kernel contained a buffer overread. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2019-15505)
Brad Spengler discovered that a Spectre mitigation was improperly implemented in the ptrace susbsystem of the Linux kernel. A local attacker could possibly use this to expose sensitive information. (CVE-2019-15902)
Update instructions
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 16.04 LTS
- linux-image-4.4.0-1060-kvm - 4.4.0-1060.67
- linux-image-4.4.0-1096-aws - 4.4.0-1096.107
- linux-image-4.4.0-1124-raspi2 - 4.4.0-1124.133
- linux-image-4.4.0-1128-snapdragon - 4.4.0-1128.136
- linux-image-4.4.0-166-generic - 4.4.0-166.195
- linux-image-4.4.0-166-generic-lpae - 4.4.0-166.195
- linux-image-4.4.0-166-lowlatency - 4.4.0-166.195
- linux-image-4.4.0-166-powerpc-e500mc - 4.4.0-166.195
- linux-image-4.4.0-166-powerpc-smp - 4.4.0-166.195
- linux-image-4.4.0-166-powerpc64-emb - 4.4.0-166.195
- linux-image-4.4.0-166-powerpc64-smp - 4.4.0-166.195
- linux-image-aws - 4.4.0.1096.100
- linux-image-generic - 4.4.0.166.174
- linux-image-generic-lpae - 4.4.0.166.174
- linux-image-kvm - 4.4.0.1060.60
- linux-image-lowlatency - 4.4.0.166.174
- linux-image-powerpc-e500mc - 4.4.0.166.174
- linux-image-powerpc-smp - 4.4.0.166.174
- linux-image-powerpc64-emb - 4.4.0.166.174
- linux-image-powerpc64-smp - 4.4.0.166.174
- linux-image-raspi2 - 4.4.0.1124.124
- linux-image-snapdragon - 4.4.0.1128.120
- linux-image-virtual - 4.4.0.166.174
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-2016-10906
- CVE-2017-18232
- CVE-2018-21008
- CVE-2019-14814
- CVE-2019-14816
- CVE-2019-14821
- CVE-2019-15117
- CVE-2019-15118
- CVE-2019-15505
- CVE-2019-15902
from Ubuntu Security Notices https://ift.tt/2JaGtud