Ubuntu Security Notice USN-4419-1
July 06, 2020
linux, linux-lts-xenial, linux-aws, linux-kvm, linux-raspi2,
linux-snapdragon vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 16.04 LTS
- Ubuntu 14.04 ESM
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 (V7) systems
- linux-snapdragon: Linux kernel for Qualcomm Snapdragon
processors
- linux-lts-xenial: Linux hardware enablement kernel from Xenial
for Trusty
Details:
It was discovered that a race condition existed in the Precision
Time
Protocol (PTP) implementation in the Linux kernel, leading to a
use-after-
free vulnerability. A local attacker could possibly use this to
cause a
denial of service (system crash) or possibly execute arbitrary
code.
(CVE-2020-10690)
Matthew Sheets discovered that the SELinux network label
handling
implementation in the Linux kernel could be coerced into
de-referencing a
NULL pointer. A remote attacker could use this to cause a denial of
service
(system crash). (CVE-2020-10711)
It was discovered that the SCSI generic (sg) driver in the Linux
kernel did
not properly handle certain error conditions correctly. A local
privileged
attacker could use this to cause a denial of service (system
crash).
(CVE-2020-12770)
It was discovered that the USB Gadget device driver in the Linux
kernel did
not validate arguments passed from configfs in some situations. A
local
attacker could possibly use this to cause a denial of service
(system
crash) or possibly expose sensitive information.
(CVE-2020-13143)
Shijie Luo discovered that the ext4 file system implementation
in the Linux
kernel did not properly check for a too-large journal size. An
attacker
could use this to construct a malicious ext4 image that, when
mounted,
could cause a denial of service (soft lockup). (CVE-2020-8992)
Update instructions:
The problem can be corrected by updating your system to the
following
package versions:
Ubuntu 16.04 LTS:
linux-image-4.4.0-1076-kvm 4.4.0-1076.83
linux-image-4.4.0-1110-aws 4.4.0-1110.121
linux-image-4.4.0-1135-raspi2 4.4.0-1135.144
linux-image-4.4.0-1139-snapdragon 4.4.0-1139.147
linux-image-4.4.0-185-generic 4.4.0-185.215
linux-image-4.4.0-185-generic-lpae 4.4.0-185.215
linux-image-4.4.0-185-lowlatency 4.4.0-185.215
linux-image-4.4.0-185-powerpc-e500mc 4.4.0-185.215
linux-image-4.4.0-185-powerpc-smp 4.4.0-185.215
linux-image-4.4.0-185-powerpc64-emb 4.4.0-185.215
linux-image-4.4.0-185-powerpc64-smp 4.4.0-185.215
linux-image-aws 4.4.0.1110.114
linux-image-generic 4.4.0.185.191
linux-image-generic-lpae 4.4.0.185.191
linux-image-kvm 4.4.0.1076.74
linux-image-lowlatency 4.4.0.185.191
linux-image-powerpc-e500mc 4.4.0.185.191
linux-image-powerpc-smp 4.4.0.185.191
linux-image-powerpc64-emb 4.4.0.185.191
linux-image-powerpc64-smp 4.4.0.185.191
linux-image-raspi2 4.4.0.1135.135
linux-image-snapdragon 4.4.0.1139.131
linux-image-virtual 4.4.0.185.191
Ubuntu 14.04 ESM:
linux-image-4.4.0-1074-aws 4.4.0-1074.78
linux-image-4.4.0-185-generic 4.4.0-185.215~14.04.1
linux-image-4.4.0-185-generic-lpae 4.4.0-185.215~14.04.1
linux-image-4.4.0-185-lowlatency 4.4.0-185.215~14.04.1
linux-image-4.4.0-185-powerpc-e500mc 4.4.0-185.215~14.04.1
linux-image-4.4.0-185-powerpc-smp 4.4.0-185.215~14.04.1
linux-image-4.4.0-185-powerpc64-emb 4.4.0-185.215~14.04.1
linux-image-4.4.0-185-powerpc64-smp 4.4.0-185.215~14.04.1
linux-image-aws 4.4.0.1074.71
linux-image-generic-lpae-lts-xenial 4.4.0.185.162
linux-image-generic-lts-xenial 4.4.0.185.162
linux-image-lowlatency-lts-xenial 4.4.0.185.162
linux-image-powerpc-e500mc-lts-xenial 4.4.0.185.162
linux-image-powerpc-smp-lts-xenial 4.4.0.185.162
linux-image-powerpc64-emb-lts-xenial 4.4.0.185.162
linux-image-powerpc64-smp-lts-xenial 4.4.0.185.162
linux-image-virtual-lts-xenial 4.4.0.185.162
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:
https://usn.ubuntu.com/4419-1
CVE-2020-10690, CVE-2020-10711, CVE-2020-12770, CVE-2020-13143,
CVE-2020-8992
Package Information:
https://launchpad.net/ubuntu/+source/linux/4.4.0-185.215
https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1110.121
https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1076.83
https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1135.144
https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1139.147
Read more https://packetstormsecurity.com/files/158370/USN-4419-1.txt