Executive Summary

Summary
Title Linux kernel vulnerabilities
Informations
NameUSN-4255-1First vendor Publication2020-01-28
VendorUbuntuLast vendor Modification2020-01-28
Severity (Vendor) N/ARevisionN/A

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base ScoreN/AAttack RangeN/A
Cvss Impact ScoreN/AAttack ComplexityN/A
Cvss Expoit ScoreN/AAuthenticationN/A
Calculate full CVSS 2.0 Vectors scores

Detail

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

- Ubuntu 18.04 LTS

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-oem: Linux kernel for OEM processors

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 can lead to a use-after-free while destroying GEM contexts in the i915 driver for the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-7053)

Update instructions:

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

Ubuntu 18.04 LTS:
linux-image-4.15.0-1058-aws 4.15.0-1058.60
linux-image-4.15.0-1067-oem 4.15.0-1067.77
linux-image-4.15.0-76-generic 4.15.0-76.86
linux-image-4.15.0-76-generic-lpae 4.15.0-76.86
linux-image-4.15.0-76-lowlatency 4.15.0-76.86
linux-image-aws 4.15.0.1058.59
linux-image-aws-lts-18.04 4.15.0.1058.59
linux-image-generic 4.15.0.76.78
linux-image-generic-lpae 4.15.0.76.78
linux-image-lowlatency 4.15.0.76.78
linux-image-oem 4.15.0.1067.71
linux-image-powerpc-e500mc 4.15.0.76.78
linux-image-powerpc-smp 4.15.0.76.78
linux-image-powerpc64-emb 4.15.0.76.78
linux-image-powerpc64-smp 4.15.0.76.78
linux-image-virtual 4.15.0.76.78

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/4255-1
CVE-2019-14615, CVE-2020-7053

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.15.0-76.86
https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1058.60
https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1067.77

Original Source

Url : http://www.ubuntu.com/usn/USN-4255-1

Alert History

If you want to see full details history, please login or register.
0
DateInformations
2020-01-28 05:19:11
  • First insertion