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-4313-1 First vendor Publication 2020-03-30
Vendor Ubuntu Last vendor Modification 2020-03-30
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 - Ubuntu 18.04 LTS

Summary:

The system could be made to expose sensitive information or run programs as an administrator.

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-oracle: Linux kernel for Oracle Cloud systems - linux-raspi2: Linux kernel for Raspberry Pi 2 - linux-azure-5.3: Linux kernel for Microsoft Azure Cloud systems - linux-gcp-5.3: Linux kernel for Google Cloud Platform (GCP) systems - linux-gke-5.3: Linux kernel for Google Container Engine (GKE) systems - linux-hwe: Linux hardware enablement (HWE) kernel - linux-oracle-5.3: Linux kernel buildinfo for version 5.3.0 on 64 bit x86 SMP - linux-raspi2-5.3: Linux kernel for Raspberry Pi 2

Details:

Manfred Paul discovered that the bpf verifier in the Linux kernel did not properly calculate register bounds for certain operations. A local attacker could use this to expose sensitive information (kernel memory) or gain administrative privileges.

Update instructions:

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

Ubuntu 19.10:
linux-image-5.3.0-1013-oracle 5.3.0-1013.14
linux-image-5.3.0-1014-kvm 5.3.0-1014.15
linux-image-5.3.0-1015-aws 5.3.0-1015.16
linux-image-5.3.0-1016-gcp 5.3.0-1016.17
linux-image-5.3.0-1018-azure 5.3.0-1018.19
linux-image-5.3.0-1021-raspi2 5.3.0-1021.23
linux-image-5.3.0-45-generic 5.3.0-45.37
linux-image-5.3.0-45-generic-lpae 5.3.0-45.37
linux-image-5.3.0-45-lowlatency 5.3.0-45.37
linux-image-5.3.0-45-snapdragon 5.3.0-45.37
linux-image-aws 5.3.0.1015.17
linux-image-azure 5.3.0.1018.37
linux-image-gcp 5.3.0.1016.17
linux-image-generic 5.3.0.45.38
linux-image-generic-lpae 5.3.0.45.38
linux-image-gke 5.3.0.1016.17
linux-image-kvm 5.3.0.1014.16
linux-image-lowlatency 5.3.0.45.38
linux-image-oracle 5.3.0.1013.14
linux-image-raspi2 5.3.0.1021.18
linux-image-snapdragon 5.3.0.45.38
linux-image-virtual 5.3.0.45.38

Ubuntu 18.04 LTS:
linux-image-5.3.0-1013-oracle 5.3.0-1013.14~18.04.1
linux-image-5.3.0-1016-gcp 5.3.0-1016.17~18.04.1
linux-image-5.3.0-1016-gke 5.3.0-1016.17~18.04.1
linux-image-5.3.0-1018-azure 5.3.0-1018.19~18.04.1
linux-image-5.3.0-1021-raspi2 5.3.0-1021.23~18.04.1
linux-image-5.3.0-45-generic 5.3.0-45.37~18.04.1
linux-image-5.3.0-45-generic-lpae 5.3.0-45.37~18.04.1
linux-image-5.3.0-45-lowlatency 5.3.0-45.37~18.04.1
linux-image-azure-edge 5.3.0.1018.18
linux-image-gcp-edge 5.3.0.1016.15
linux-image-generic-hwe-18.04 5.3.0.45.101
linux-image-generic-lpae-hwe-18.04 5.3.0.45.101
linux-image-gke-5.3 5.3.0.1016.6
linux-image-lowlatency-hwe-18.04 5.3.0.45.101
linux-image-oracle-edge 5.3.0.1013.12
linux-image-raspi2-hwe-18.04 5.3.0.1021.10
linux-image-snapdragon-hwe-18.04 5.3.0.45.101
linux-image-virtual-hwe-18.04 5.3.0.45.101

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/4313-1
CVE-2020-8835

Package Information:
https://launchpad.net/ubuntu/+source/linux/5.3.0-45.37
https://launchpad.net/ubuntu/+source/linux-aws/5.3.0-1015.16
https://launchpad.net/ubuntu/+source/linux-azure/5.3.0-1018.19
https://launchpad.net/ubuntu/+source/linux-gcp/5.3.0-1016.17
https://launchpad.net/ubuntu/+source/linux-kvm/5.3.0-1014.15
https://launchpad.net/ubuntu/+source/linux-oracle/5.3.0-1013.14
https://launchpad.net/ubuntu/+source/linux-raspi2/5.3.0-1021.23
https://launchpad.net/ubuntu/+source/linux-azure-5.3/5.3.0-1018.19~18.04.1
https://launchpad.net/ubuntu/+source/linux-gcp-5.3/5.3.0-1016.17~18.04.1
https://launchpad.net/ubuntu/+source/linux-gke-5.3/5.3.0-1016.17~18.04.1
https://launchpad.net/ubuntu/+source/linux-hwe/5.3.0-45.37~18.04.1
https://launchpad.net/ubuntu/+source/linux-oracle-5.3/5.3.0-1013.14~18.04.1
https://launchpad.net/ubuntu/+source/linux-raspi2-5.3/5.3.0-1021.23~18.04.1

Original Source

Url : http://www.ubuntu.com/usn/USN-4313-1

CWE : Common Weakness Enumeration

% Id Name
50 % CWE-787 Out-of-bounds Write (CWE/SANS Top 25)
50 % CWE-125 Out-of-bounds Read

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 1
Application 1
Application 1
Application 1
Application 1
Os 2
Os 3
Os 3376

Alert History

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0
1
Date Informations
2020-05-23 13:03:46
  • Multiple Updates
2020-03-30 21:18:49
  • First insertion