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 (Xenial HWE) vulnerabilities
Informations
Name USN-3879-2 First vendor Publication 2019-02-04
Vendor Ubuntu Last vendor Modification 2019-02-04
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: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 14.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description: - linux-aws: Linux kernel for Amazon Web Services (AWS) systems - linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

Details:

USN-3879-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu 14.04 LTS.

Wen Xu discovered that the ext4 file system implementation in the Linux kernel could possibly perform an out of bounds write when updating the journal for an inline file. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash). (CVE-2018-10883)

Vasily Averin and Pavel Tikhomirov discovered that the cleancache subsystem of the Linux kernel did not properly initialize new files in some situations. A local attacker could use this to expose sensitive information. (CVE-2018-16862)

Wei Wu discovered that the KVM implementation in the Linux kernel did not properly ensure that ioapics were initialized. A local attacker could use this to cause a denial of service (system crash). (CVE-2018-19407)

Mathias Payer and Hui Peng discovered a use-after-free vulnerability in the Advanced Linux Sound Architecture (ALSA) subsystem. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2018-19824)

Hui Peng and Mathias Payer discovered that the USB subsystem in the Linux kernel did not properly handle size checks when handling an extra USB descriptor. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2018-20169)

Update instructions:

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

Ubuntu 14.04 LTS:
linux-image-4.4.0-1038-aws 4.4.0-1038.41
linux-image-4.4.0-142-generic 4.4.0-142.168~14.04.1
linux-image-4.4.0-142-generic-lpae 4.4.0-142.168~14.04.1
linux-image-4.4.0-142-lowlatency 4.4.0-142.168~14.04.1
linux-image-4.4.0-142-powerpc-e500mc 4.4.0-142.168~14.04.1
linux-image-4.4.0-142-powerpc-smp 4.4.0-142.168~14.04.1
linux-image-4.4.0-142-powerpc64-emb 4.4.0-142.168~14.04.1
linux-image-4.4.0-142-powerpc64-smp 4.4.0-142.168~14.04.1
linux-image-aws 4.4.0.1038.38
linux-image-generic-lpae-lts-xenial 4.4.0.142.122
linux-image-generic-lts-xenial 4.4.0.142.122
linux-image-lowlatency-lts-xenial 4.4.0.142.122
linux-image-powerpc-e500mc-lts-xenial 4.4.0.142.122
linux-image-powerpc-smp-lts-xenial 4.4.0.142.122
linux-image-powerpc64-emb-lts-xenial 4.4.0.142.122
linux-image-powerpc64-smp-lts-xenial 4.4.0.142.122

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-3879-2
https://usn.ubuntu.com/usn/usn-3879-1
CVE-2018-10883, CVE-2018-16862, CVE-2018-19407, CVE-2018-19824,
CVE-2018-20169

Package Information:
https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1038.41
https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-142.168~14.04.1

Original Source

Url : http://www.ubuntu.com/usn/USN-3879-2

CWE : Common Weakness Enumeration

% Id Name
20 % CWE-787 Out-of-bounds Write (CWE/SANS Top 25)
20 % CWE-476 NULL Pointer Dereference
20 % CWE-416 Use After Free
20 % CWE-400 Uncontrolled Resource Consumption ('Resource Exhaustion')
20 % CWE-200 Information Exposure

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 5
Os 1
Os 3181
Os 1
Os 1
Os 1
Os 1

Nessus® Vulnerability Scanner

Date Description
2019-01-14 Name : The remote Amazon Linux AMI host is missing a security update.
File : ala_ALAS-2019-1145.nasl - Type : ACT_GATHER_INFO
2019-01-10 Name : The remote Amazon Linux 2 host is missing a security update.
File : al2_ALAS-2019-1145.nasl - Type : ACT_GATHER_INFO
2019-01-03 Name : The remote Fedora host is missing one or more security updates.
File : fedora_2018-3857a8b41a.nasl - Type : ACT_GATHER_INFO
2019-01-03 Name : The remote Fedora host is missing one or more security updates.
File : fedora_2018-5904d0794d.nasl - Type : ACT_GATHER_INFO
2019-01-03 Name : The remote Fedora host is missing one or more security updates.
File : fedora_2018-6e8c330d50.nasl - Type : ACT_GATHER_INFO
2019-01-03 Name : The remote Fedora host is missing one or more security updates.
File : fedora_2018-87ba0312c2.nasl - Type : ACT_GATHER_INFO
2019-01-03 Name : The remote Fedora host is missing one or more security updates.
File : fedora_2018-a0914af224.nasl - Type : ACT_GATHER_INFO
2018-12-21 Name : The remote Amazon Linux AMI host is missing a security update.
File : ala_ALAS-2018-1133.nasl - Type : ACT_GATHER_INFO
2018-12-20 Name : The remote Amazon Linux 2 host is missing a security update.
File : al2_ALAS-2018-1133.nasl - Type : ACT_GATHER_INFO
2018-11-16 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2018-3083.nasl - Type : ACT_GATHER_INFO
2018-07-20 Name : The remote Debian host is missing a security update.
File : debian_DLA-1423.nasl - Type : ACT_GATHER_INFO

Alert History

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0
Date Informations
2019-02-05 05:18:49
  • First insertion