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Ubuntu 18.04 LTS Security Advisory USN-4368-1: Kernel Risks Noted

ubuntu
Calendar Grey May 19, 2020
Dist Ubuntu Esm H88
=========================================================================Ubuntu Security Notice USN-
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-gke-5.0: Linux kernel for Google Container Engine (GKE) systems

- linux-oem-osp1: Linux kernel for OEM systems

Details:

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...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu race condition kernel data exposure

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 18.04 LTS:
  linux-image-5.0.0-1037-gke      5.0.0-1037.38
  linux-image-5.0.0-1052-oem-osp1  5.0.0-1052.57
  linux-image-gke-5.0             5.0.0.1037.25
  linux-image-oem-osp1            5.0.0.1052.55

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://ubuntu.com/security/notices/USN-4368-1

CVE-2019-19769, CVE-2020-11494, CVE-2020-11565, CVE-2020-11608,

CVE-2020-11609, CVE-2020-11668, CVE-2020-11669, CVE-2020-12657

Severity
important
Lowest
Low
Medium
High
Critical

May 19, 2020

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu race condition kernel data exposure

Package Information

https://launchpad.net/ubuntu/+source/linux-gke-5.0/5.0.0-1037.38
https://launchpad.net/ubuntu/+source/linux-oem-osp1/5.0.0-1052.57

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