Site icon 지락문화예술공작단

USN-4254-1: Linux kernel vulnerabilities

KENNETH

USN-4254-1: Linux kernel vulnerabilities

linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

Summary

Several security issues were fixed in the Linux kernel.

Software Description

Details

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

Source: USN-4254-1: Linux kernel vulnerabilities

Exit mobile version