Executive Summary

Summary
Title Linux kernel vulnerability
Informations
Name USN-4161-1 First vendor Publication 2019-10-21
Vendor Ubuntu Last vendor Modification 2019-10-21
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Overall CVSS Score 7.8
Base Score 7.8 Environmental Score 7.8
impact SubScore 5.9 Temporal Score 7.8
Exploitabality Sub Score 1.8
 
Attack Vector Local Attack Complexity Low
Privileges Required Low User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:L/Au:N/C:C/I:C/A:C)
Cvss Base Score 7.2 Attack Range Local
Cvss Impact Score 10 Attack Complexity Low
Cvss Expoit Score 3.9 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

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

- Ubuntu 19.10

Summary:

The system could be made to crash under certain conditions.

Software Description: - linux: Linux kernel - linux-aws: Linux kernel for Amazon Web Services (AWS) systems - linux-azure: Linux kernel for Microsoft Azure Cloud systems - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-kvm: Linux kernel for cloud environments - linux-raspi2: Linux kernel for Raspberry Pi 2

Details:

It was discovered that the IPv6 routing implementation in the Linux kernel contained a reference counting error leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

Update instructions:

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

Ubuntu 19.10:
linux-image-5.3.0-1004-aws 5.3.0-1004.4
linux-image-5.3.0-1004-azure 5.3.0-1004.4
linux-image-5.3.0-1004-kvm 5.3.0-1004.4
linux-image-5.3.0-1005-gcp 5.3.0-1005.5
linux-image-5.3.0-1008-raspi2 5.3.0-1008.9
linux-image-5.3.0-19-generic 5.3.0-19.20
linux-image-5.3.0-19-generic-lpae 5.3.0-19.20
linux-image-5.3.0-19-lowlatency 5.3.0-19.20
linux-image-5.3.0-19-snapdragon 5.3.0-19.20
linux-image-aws 5.3.0.1004.5
linux-image-azure 5.3.0.1004.21
linux-image-gcp 5.3.0.1005.5
linux-image-generic 5.3.0.19.22
linux-image-generic-lpae 5.3.0.19.22
linux-image-gke 5.3.0.1005.5
linux-image-kvm 5.3.0.1004.4
linux-image-lowlatency 5.3.0.19.22
linux-image-raspi2 5.3.0.1008.4
linux-image-snapdragon 5.3.0.19.22
linux-image-virtual 5.3.0.19.22

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/4161-1
CVE-2019-18198

Package Information:
https://launchpad.net/ubuntu/+source/linux/5.3.0-19.20
https://launchpad.net/ubuntu/+source/linux-aws/5.3.0-1004.4
https://launchpad.net/ubuntu/+source/linux-azure/5.3.0-1004.4
https://launchpad.net/ubuntu/+source/linux-gcp/5.3.0-1005.5
https://launchpad.net/ubuntu/+source/linux-kvm/5.3.0-1004.4
https://launchpad.net/ubuntu/+source/linux-raspi2/5.3.0-1008.9

Original Source

Url : http://www.ubuntu.com/usn/USN-4161-1

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-772 Missing Release of Resource after Effective Lifetime

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 1
Os 3323

Alert History

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0
1
Date Informations
2020-05-23 13:03:46
  • Multiple Updates
2019-10-22 00:19:24
  • First insertion