Executive Summary

Summary
Title Linux kernel (HWE) vulnerability
Informations
Name USN-4253-2 First vendor Publication 2020-01-28
Vendor Ubuntu Last vendor Modification 2020-01-28
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Overall CVSS Score 5.5
Base Score 5.5 Environmental Score 5.5
impact SubScore 3.6 Temporal Score 5.5
Exploitabality Sub Score 1.8
 
Attack Vector Local Attack Complexity Low
Privileges Required None User Interaction Required
Scope Unchanged Confidentiality Impact High
Integrity Impact None Availability Impact None
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:M/Au:N/C:P/I:N/A:N)
Cvss Base Score 1.9 Attack Range Local
Cvss Impact Score 2.9 Attack Complexity Medium
Cvss Expoit Score 3.4 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

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

- Ubuntu 18.04 LTS

Summary:

he Linux kernel could be made to expose sensitive information.

Software Description: - linux-hwe: Linux hardware enablement (HWE) kernel

Details:

USN-4253-1 fixed vulnerabilities in the Linux kernel for Ubuntu 19.10. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 19.10 for Ubuntu 18.04 LTS.

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.

Update instructions:

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

Ubuntu 18.04 LTS:
linux-image-5.3.0-28-generic 5.3.0-28.30~18.04.1
linux-image-5.3.0-28-generic-lpae 5.3.0-28.30~18.04.1
linux-image-5.3.0-28-lowlatency 5.3.0-28.30~18.04.1
linux-image-generic-hwe-18.04 5.3.0.28.96
linux-image-generic-lpae-hwe-18.04 5.3.0.28.96
linux-image-lowlatency-hwe-18.04 5.3.0.28.96
linux-image-snapdragon-hwe-18.04 5.3.0.28.96
linux-image-virtual-hwe-18.04 5.3.0.28.96

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/4253-2
https://usn.ubuntu.com/4253-1
CVE-2019-14615

Package Information:
https://launchpad.net/ubuntu/+source/linux-hwe/5.3.0-28.30~18.04.1

Original Source

Url : http://www.ubuntu.com/usn/USN-4253-2

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-200 Information Exposure

CPE : Common Platform Enumeration

TypeDescriptionCount
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 4
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 10
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 23
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Os 4

Alert History

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0
1
Date Informations
2020-05-23 13:03:46
  • Multiple Updates
2020-01-29 05:19:26
  • First insertion