Executive Summary

Summary
Title Linux kernel (HWE) vulnerability
Informations
Name USN-3732-2 First vendor Publication 2018-08-06
Vendor Ubuntu Last vendor Modification 2018-08-06
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:N/AC:L/Au:N/C:N/I:N/A:C)
Cvss Base Score 7.8 Attack Range Network
Cvss Impact Score 6.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

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

- Ubuntu 16.04 LTS

Summary:

The system could be made unavailable if it received specially crafted network traffic.

Software Description: - linux-azure: Linux kernel for Microsoft Azure Cloud systems - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-hwe: Linux hardware enablement (HWE) kernel

Details:

USN-3732-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 18.04 LTS for Ubuntu 16.04 LTS.

Juha-Matti Tilli discovered that the TCP implementation in the Linux kernel performed algorithmically expensive operations in some situations when handling incoming packets. A remote attacker could use this to cause a denial of service.

Update instructions:

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

Ubuntu 16.04 LTS:
linux-image-4.15.0-1015-gcp 4.15.0-1015.15~16.04.1
linux-image-4.15.0-1019-azure 4.15.0-1019.19~16.04.1
linux-image-4.15.0-30-generic 4.15.0-30.32~16.04.1
linux-image-4.15.0-30-generic-lpae 4.15.0-30.32~16.04.1
linux-image-4.15.0-30-lowlatency 4.15.0-30.32~16.04.1
linux-image-azure 4.15.0.1019.25
linux-image-gcp 4.15.0.1015.27
linux-image-generic-hwe-16.04 4.15.0.30.52
linux-image-generic-lpae-hwe-16.04 4.15.0.30.52
linux-image-gke 4.15.0.1015.27
linux-image-lowlatency-hwe-16.04 4.15.0.30.52

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/usn/usn-3732-2
https://usn.ubuntu.com/usn/usn-3732-1
CVE-2018-5390

Package Information:
https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1019.19~16.04.1
https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1015.15~16.04.1
https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-30.32~16.04.1

Original Source

Url : http://www.ubuntu.com/usn/USN-3732-2

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-400 Uncontrolled Resource Consumption ('Resource Exhaustion')

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 1
Application 1
Application 6
Application 1
Application 2
Application 1
Application 1
Application 1
Application 1
Application 88
Application 77
Application 80
Application 74
Application 99
Application 75
Application 73
Application 69
Application 93
Application 89
Application 93
Application 78
Application 84
Application 1
Application 1
Application 1
Application 1
Application 1
Hardware 7
Hardware 6
Os 9
Os 4
Os 2
Os 3155
Os 1
Os 1
Os 6
Os 6
Os 4
Os 1

Nessus® Vulnerability Scanner

Date Description
2019-01-10 Name : The remote device is affected by multiple vulnerabilities.
File : juniper_space_jsa10917_184R1.nasl - Type : ACT_GATHER_INFO
2018-12-14 Name : The remote device is missing a vendor-supplied security patch.
File : f5_bigip_SOL95343321.nasl - Type : ACT_GATHER_INFO
2018-12-05 Name : The remote PhotonOS host is missing multiple security updates.
File : PhotonOS_PHSA-2018-2_0-0101.nasl - Type : ACT_GATHER_INFO
2018-10-26 Name : The remote EulerOS Virtualization host is missing multiple security updates.
File : EulerOS_SA-2018-1345.nasl - Type : ACT_GATHER_INFO
2018-10-25 Name : The remote EulerOS Virtualization host is missing a security update.
File : EulerOS_SA-2018-1322.nasl - Type : ACT_GATHER_INFO
2018-09-04 Name : The remote EulerOS host is missing multiple security updates.
File : EulerOS_SA-2018-1278.nasl - Type : ACT_GATHER_INFO
2018-09-04 Name : The remote EulerOS host is missing multiple security updates.
File : EulerOS_SA-2018-1279.nasl - Type : ACT_GATHER_INFO
2018-08-31 Name : The remote Virtuozzo host is missing multiple security updates.
File : Virtuozzo_VZA-2018-063.nasl - Type : ACT_GATHER_INFO
2018-08-20 Name : The remote Virtuozzo host is missing multiple security updates.
File : Virtuozzo_VZA-2018-055.nasl - Type : ACT_GATHER_INFO
2018-08-16 Name : The remote Debian host is missing a security update.
File : debian_DLA-1466.nasl - Type : ACT_GATHER_INFO
2018-08-15 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2018-2384.nasl - Type : ACT_GATHER_INFO
2018-08-15 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2018-2390.nasl - Type : ACT_GATHER_INFO
2018-08-07 Name : The remote Amazon Linux 2 host is missing a security update.
File : al2_ALAS-2018-1050.nasl - Type : ACT_GATHER_INFO
2018-08-07 Name : The remote Amazon Linux AMI host is missing a security update.
File : ala_ALAS-2018-1049.nasl - Type : ACT_GATHER_INFO
2018-08-07 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-4266.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
2
Date Informations
2018-10-11 17:21:50
  • Multiple Updates
2018-08-07 00:21:17
  • Multiple Updates
2018-08-07 00:18:58
  • First insertion