Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Summary
Title Linux kernel vulnerability
Informations
Name USN-4031-1 First vendor Publication 2019-06-24
Vendor Ubuntu Last vendor Modification 2019-06-24
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:M/Au:N/C:C/I:C/A:C)
Cvss Base Score 6.9 Attack Range Local
Cvss Impact Score 10 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 19.04 - Ubuntu 18.10 - Ubuntu 18.04 LTS

Summary:

64-Bit PowerPC systems could be made to expose sensitive information.

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

Details:

It was discovered that the Linux kernel did not properly separate certain memory mappings when creating new userspace processes on 64-bit Power (ppc64el) systems. A local attacker could use this to access memory contents or cause memory corruption of other processes on the system.

Update instructions:

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

Ubuntu 19.04:
linux-image-5.0.0-19-generic 5.0.0-19.20
linux-image-generic 5.0.0.19.20
linux-image-virtual 5.0.0.19.20

Ubuntu 18.10:
linux-image-4.18.0-24-generic 4.18.0-24.25
linux-image-generic 4.18.0.24.25
linux-image-powerpc-e500mc 4.18.0.24.25
linux-image-powerpc-smp 4.18.0.24.25
linux-image-powerpc64-emb 4.18.0.24.25
linux-image-powerpc64-smp 4.18.0.24.25
linux-image-virtual 4.18.0.24.25

Ubuntu 18.04 LTS:
linux-image-4.18.0-24-generic 4.18.0-24.25~18.04.1
linux-image-generic-hwe-18.04 4.18.0.24.74
linux-image-virtual-hwe-18.04 4.18.0.24.74

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/4031-1
CVE-2019-12817

Package Information:
https://launchpad.net/ubuntu/+source/linux/5.0.0-19.20
https://launchpad.net/ubuntu/+source/linux/4.18.0-24.25
https://launchpad.net/ubuntu/+source/linux-hwe/4.18.0-24.25~18.04.1

Original Source

Url : http://www.ubuntu.com/usn/USN-4031-1

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-787 Out-of-bounds Write (CWE/SANS Top 25)

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 1
Os 3
Os 2
Os 2
Os 3324
Os 1
Os 1
Os 3
Os 2
Os 2

Alert History

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0
1
2
Date Informations
2019-06-26 00:21:21
  • Multiple Updates
2019-06-25 17:21:49
  • Multiple Updates
2019-06-24 21:19:12
  • First insertion