USN-4369-1: Linux kernel vulnerabilities
linux, linux-aws, linux-aws-5.3, linux-gcp, linux-gcp-5.3, linux-gke-5.3, linux-hwe, linux-kvm, linux-oracle, linux-oracle-5.3, linux-raspi2 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 19.10
- Ubuntu 18.04 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-gcp – Linux kernel for Google Cloud Platform (GCP) systems
- linux-kvm – Linux kernel for cloud environments
- linux-oracle – Linux kernel for Oracle Cloud systems
- linux-raspi2 – Linux kernel for Raspberry Pi (V7) systems
- linux-aws-5.3 – Linux kernel for Amazon Web Services (AWS) systems
- linux-gcp-5.3 – Linux kernel for Google Cloud Platform (GCP) systems
- linux-gke-5.3 – Linux kernel for Google Container Engine (GKE) systems
- linux-hwe – Linux hardware enablement (HWE) kernel
- linux-oracle-5.3 – Linux kernel for Oracle Cloud systems
Details
It was discovered that the btrfs implementation in the Linux kernel did not
properly detect that a block was marked dirty in some situations. An
attacker could use this to specially craft a file system image that, when
unmounted, could cause a denial of service (system crash). (CVE-2019-19377)
Tristan Madani discovered that the file locking implementation in the Linux
kernel contained a race condition. A local attacker could possibly use this
to cause a denial of service or expose sensitive information.
(CVE-2019-19769)
It was discovered that the Serial CAN interface driver in the Linux kernel
did not properly initialize data. A local attacker could use this to expose
sensitive information (kernel memory). (CVE-2020-11494)
It was discovered that the linux kernel did not properly validate certain
mount options to the tmpfs virtual memory file system. A local attacker
with the ability to specify mount options could use this to cause a denial
of service (system crash). (CVE-2020-11565)
It was discovered that the OV51x USB Camera 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-2020-11608)
It was discovered that the STV06XX USB Camera 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-2020-11609)
It was discovered that the Xirlink C-It USB Camera 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-2020-11668)
It was discovered that the block layer in the Linux kernel contained a race
condition leading to a use-after-free vulnerability. A local attacker could
possibly use this to cause a denial of service (system crash) or execute
arbitrary code. (CVE-2020-12657)
Update instructions
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 19.10
- linux-image-5.3.0-1017-kvm – 5.3.0-1017.19
- linux-image-5.3.0-1018-oracle – 5.3.0-1018.20
- linux-image-5.3.0-1019-aws – 5.3.0-1019.21
- linux-image-5.3.0-1020-gcp – 5.3.0-1020.22
- linux-image-5.3.0-1025-raspi2 – 5.3.0-1025.27
- linux-image-5.3.0-53-generic – 5.3.0-53.47
- linux-image-5.3.0-53-generic-lpae – 5.3.0-53.47
- linux-image-5.3.0-53-lowlatency – 5.3.0-53.47
- linux-image-5.3.0-53-snapdragon – 5.3.0-53.47
- linux-image-aws – 5.3.0.1019.31
- linux-image-gcp – 5.3.0.1020.31
- linux-image-generic – 5.3.0.53.45
- linux-image-generic-lpae – 5.3.0.53.45
- linux-image-gke – 5.3.0.1020.31
- linux-image-kvm – 5.3.0.1017.19
- linux-image-lowlatency – 5.3.0.53.45
- linux-image-oracle – 5.3.0.1018.33
- linux-image-raspi2 – 5.3.0.1025.22
- linux-image-snapdragon – 5.3.0.53.45
- linux-image-virtual – 5.3.0.53.45
- Ubuntu 18.04 LTS
- linux-image-5.3.0-1018-oracle – 5.3.0-1018.20~18.04.1
- linux-image-5.3.0-1019-aws – 5.3.0-1019.21~18.04.1
- linux-image-5.3.0-1020-gcp – 5.3.0-1020.22~18.04.1
- linux-image-5.3.0-1020-gke – 5.3.0-1020.22~18.04.1
- linux-image-5.3.0-53-generic – 5.3.0-53.47~18.04.1
- linux-image-5.3.0-53-generic-lpae – 5.3.0-53.47~18.04.1
- linux-image-5.3.0-53-lowlatency – 5.3.0-53.47~18.04.1
- linux-image-aws – 5.3.0.1019.20
- linux-image-aws-edge – 5.3.0.1019.20
- linux-image-gcp – 5.3.0.1020.19
- linux-image-gcp-edge – 5.3.0.1020.19
- linux-image-generic-hwe-18.04 – 5.3.0.53.109
- linux-image-generic-lpae-hwe-18.04 – 5.3.0.53.109
- linux-image-gke-5.3 – 5.3.0.1020.10
- linux-image-gkeop-5.3 – 5.3.0.53.109
- linux-image-lowlatency-hwe-18.04 – 5.3.0.53.109
- linux-image-oracle – 5.3.0.1018.19
- linux-image-snapdragon-hwe-18.04 – 5.3.0.53.109
- linux-image-virtual-hwe-18.04 – 5.3.0.53.109
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.
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