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Ubuntu 18.04 LTS: USN-4413-1 Critical: Linux Kernel Denial of Service

ubuntu
Calendar Grey July 2, 2020
Dist Ubuntu Esm H88
Remedies for Linux core vulnerabilities published via Ubuntu notice USN-4413-1 aimed at averting possible system failures.
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:

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)

Dmitry Vyukov ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel ubuntu system crash

Update Instructions

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

Ubuntu 18.04 LTS:
  linux-image-5.0.0-1043-gke      5.0.0-1043.44
  linux-image-5.0.0-1063-oem-osp1  5.0.0-1063.68
  linux-image-gke-5.0             5.0.0.1043.28
  linux-image-oem-osp1            5.0.0.1063.61

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-4413-1

CVE-2020-10711, CVE-2020-10751, CVE-2020-12768, CVE-2020-12770,

CVE-2020-13143

Severity
critical
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Critical

July 02, 2020

Topics%20covered

Topics Covered

security advisory denial of service kernel ubuntu system crash

Package Information

https://launchpad.net/ubuntu/+source/linux-gke-5.0/5.0.0-1043.44
https://launchpad.net/ubuntu/+source/linux-oem-osp1/5.0.0-1063.68

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