USN-4114-1: Linux kernel vulnerabilities
linux, linux-azure, linux-gcp, linux-gke-5.0, linux-hwe, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 19.04
- Ubuntu 18.04 LTS
Summary
Several security issues were fixed in the Linux kernel.
Software Description
- linux – Linux kernel
- linux-azure – Linux kernel for Microsoft Azure Cloud systems
- linux-gcp – Linux kernel for Google Cloud Platform (GCP) systems
- linux-kvm – Linux kernel for cloud environments
- linux-raspi2 – Linux kernel for Raspberry Pi 2
- linux-snapdragon – Linux kernel for Snapdragon processors
- linux-gke-5.0 – Linux kernel for Google Container Engine (GKE) systems
- linux-hwe – Linux hardware enablement (HWE) kernel
Details
Amit Klein and Benny Pinkas discovered that the Linux kernel did not
sufficiently randomize IP ID values generated for connectionless networking
protocols. A remote attacker could use this to track particular Linux
devices. (CVE-2019-10638)
Praveen Pandey discovered that the Linux kernel did not properly validate
sent signals in some situations on PowerPC systems with transactional
memory disabled. A local attacker could use this to cause a denial of
service. (CVE-2019-13648)
It was discovered that the floppy driver in the Linux kernel did not
properly validate meta data, leading to a buffer overread. A local attacker
could use this to cause a denial of service (system crash).
(CVE-2019-14283)
It was discovered that the floppy driver in the Linux kernel did not
properly validate ioctl() calls, leading to a division-by-zero. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2019-14284)
Jason Wang discovered that an infinite loop vulnerability existed in the
virtio net driver in the Linux kernel. A local attacker in a guest VM could
possibly use this to cause a denial of service in the host system.
(CVE-2019-3900)
Update instructions
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 19.04
- linux-image-5.0.0-1015-gcp – 5.0.0-1015.15
- linux-image-5.0.0-1015-kvm – 5.0.0-1015.16
- linux-image-5.0.0-1015-raspi2 – 5.0.0-1015.15
- linux-image-5.0.0-1018-azure – 5.0.0-1018.19
- linux-image-5.0.0-1019-snapdragon – 5.0.0-1019.20
- linux-image-5.0.0-27-generic – 5.0.0-27.28
- linux-image-5.0.0-27-generic-lpae – 5.0.0-27.28
- linux-image-5.0.0-27-lowlatency – 5.0.0-27.28
- linux-image-azure – 5.0.0.1018.17
- linux-image-gcp – 5.0.0.1015.41
- linux-image-generic – 5.0.0.27.28
- linux-image-generic-lpae – 5.0.0.27.28
- linux-image-gke – 5.0.0.1015.41
- linux-image-kvm – 5.0.0.1015.15
- linux-image-lowlatency – 5.0.0.27.28
- linux-image-raspi2 – 5.0.0.1015.12
- linux-image-snapdragon – 5.0.0.1019.12
- linux-image-virtual – 5.0.0.27.28
- Ubuntu 18.04 LTS
- linux-image-5.0.0-1015-gke – 5.0.0-1015.15~18.04.1
- linux-image-5.0.0-1018-azure – 5.0.0-1018.19~18.04.1
- linux-image-5.0.0-27-generic – 5.0.0-27.28~18.04.1
- linux-image-5.0.0-27-generic-lpae – 5.0.0-27.28~18.04.1
- linux-image-5.0.0-27-lowlatency – 5.0.0-27.28~18.04.1
- linux-image-azure – 5.0.0.1018.28
- linux-image-generic-hwe-18.04 – 5.0.0.27.84
- linux-image-generic-lpae-hwe-18.04 – 5.0.0.27.84
- linux-image-gke-5.0 – 5.0.0.1015.5
- linux-image-lowlatency-hwe-18.04 – 5.0.0.27.84
- linux-image-snapdragon-hwe-18.04 – 5.0.0.27.84
- linux-image-virtual-hwe-18.04 – 5.0.0.27.84
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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