USN-4162-1: Linux kernel vulnerabilities
linux, linux-aws, linux-aws-hwe, linux-azure, linux-gcp, linux-gke-4.15, linux-hwe, 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-aws – Linux kernel for Amazon Web Services (AWS) 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-aws-hwe – Linux kernel for Amazon Web Services (AWS-HWE) systems
- linux-azure – Linux kernel for Microsoft Azure Cloud systems
- linux-gcp – Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe – Linux hardware enablement (HWE) kernel
Details
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-2019-14815, 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)
It was discovered that the SMB networking file system implementation in the
Linux kernel contained a buffer overread. An attacker could use this to
expose sensitive information (kernel memory). (CVE-2019-15918)
Update instructions
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 18.04 LTS
- linux-image-4.15.0-1027-oracle – 4.15.0-1027.30
- linux-image-4.15.0-1046-gke – 4.15.0-1046.49
- linux-image-4.15.0-1048-kvm – 4.15.0-1048.48
- linux-image-4.15.0-1049-raspi2 – 4.15.0-1049.53
- linux-image-4.15.0-1052-aws – 4.15.0-1052.54
- linux-image-4.15.0-1059-oem – 4.15.0-1059.68
- linux-image-4.15.0-1066-snapdragon – 4.15.0-1066.73
- linux-image-4.15.0-66-generic – 4.15.0-66.75
- linux-image-4.15.0-66-generic-lpae – 4.15.0-66.75
- linux-image-4.15.0-66-lowlatency – 4.15.0-66.75
- linux-image-aws – 4.15.0.1052.51
- linux-image-generic – 4.15.0.66.68
- linux-image-generic-lpae – 4.15.0.66.68
- linux-image-gke – 4.15.0.1046.49
- linux-image-gke-4.15 – 4.15.0.1046.49
- linux-image-kvm – 4.15.0.1048.48
- linux-image-lowlatency – 4.15.0.66.68
- linux-image-oem – 4.15.0.1059.63
- linux-image-oracle – 4.15.0.1027.30
- linux-image-powerpc-e500mc – 4.15.0.66.68
- linux-image-powerpc-smp – 4.15.0.66.68
- linux-image-powerpc64-emb – 4.15.0.66.68
- linux-image-powerpc64-smp – 4.15.0.66.68
- linux-image-raspi2 – 4.15.0.1049.47
- linux-image-snapdragon – 4.15.0.1066.69
- linux-image-virtual – 4.15.0.66.68
- Ubuntu 16.04 LTS
- linux-image-4.15.0-1027-oracle – 4.15.0-1027.30~16.04.1
- linux-image-4.15.0-1047-gcp – 4.15.0-1047.50
- linux-image-4.15.0-1052-aws – 4.15.0-1052.54~16.04.1
- linux-image-4.15.0-1061-azure – 4.15.0-1061.66
- linux-image-4.15.0-66-generic – 4.15.0-66.75~16.04.1
- linux-image-4.15.0-66-generic-lpae – 4.15.0-66.75~16.04.1
- linux-image-4.15.0-66-lowlatency – 4.15.0-66.75~16.04.1
- linux-image-aws-hwe – 4.15.0.1052.52
- linux-image-azure – 4.15.0.1061.64
- linux-image-gcp – 4.15.0.1047.61
- linux-image-generic-hwe-16.04 – 4.15.0.66.86
- linux-image-generic-lpae-hwe-16.04 – 4.15.0.66.86
- linux-image-gke – 4.15.0.1047.61
- linux-image-lowlatency-hwe-16.04 – 4.15.0.66.86
- linux-image-oem – 4.15.0.66.86
- linux-image-oracle – 4.15.0.1027.20
- linux-image-virtual-hwe-16.04 – 4.15.0.66.86
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-2018-21008
- CVE-2019-14814
- CVE-2019-14815
- CVE-2019-14816
- CVE-2019-14821
- CVE-2019-15117
- CVE-2019-15118
- CVE-2019-15505
- CVE-2019-15902
- CVE-2019-15918
Source: USN-4162-1: Linux kernel vulnerabilities
