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 vulnerabilities
Informations
Name USN-4162-1 First vendor Publication 2019-10-22
Vendor Ubuntu Last vendor Modification 2019-10-22
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:C/I:C/A:C)
Cvss Base Score 10 Attack Range Network
Cvss Impact Score 10 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 18.04 LTS - Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description: - linux: Linux kernel - linux-aws: Linux kernel for Amazon Web Services (AWS) systems - linux-gke-4.15: Linux kernel for Google Container Engine (GKE) systems - linux-kvm: Linux kernel for cloud environments - linux-oem: Linux kernel for OEM processors - linux-oracle: Linux kernel for Oracle Cloud systems - linux-raspi2: Linux kernel for Raspberry Pi 2 - linux-snapdragon: Linux kernel for Snapdragon processors - linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems - 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:

It was discovered that the RSI 91x Wi-Fi driver in the Linux kernel did not did not handle detach operations correctly, leading to a use-after-free vulnerability. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-21008)

Wen Huang discovered that the Marvell Wi-Fi device driver in the Linux kernel did not properly perform bounds checking, leading to a heap overflow. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-14814, CVE-2019-14815, CVE-2019-14816)

Matt Delco discovered that the KVM hypervisor implementation in the Linux kernel did not properly perform bounds checking when handling coalesced MMIO write operations. A local attacker with write access to /dev/kvm could use this to cause a denial of service (system crash). (CVE-2019-14821)

Hui Peng and Mathias Payer discovered that the USB audio driver for the Linux kernel did not properly validate device meta data. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2019-15117)

Hui Peng and Mathias Payer discovered that the USB audio driver for the Linux kernel improperly performed recursion while handling device meta data. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2019-15118)

It was discovered that the Technisat DVB-S/S2 USB device driver in the Linux kernel contained a buffer overread. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2019-15505)

Brad Spengler discovered that a Spectre mitigation was improperly implemented in the ptrace susbsystem of the Linux kernel. A local attacker could possibly use this to expose sensitive information. (CVE-2019-15902)

It was discovered that the SMB networking file system implementation in the Linux kernel contained a buffer overread. An attacker could use this to expose sensitive information (kernel memory). (CVE-2019-15918)

Update instructions:

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

Ubuntu 18.04 LTS:
linux-image-4.15.0-1027-oracle 4.15.0-1027.30
linux-image-4.15.0-1046-gke 4.15.0-1046.49
linux-image-4.15.0-1048-kvm 4.15.0-1048.48
linux-image-4.15.0-1049-raspi2 4.15.0-1049.53
linux-image-4.15.0-1052-aws 4.15.0-1052.54
linux-image-4.15.0-1059-oem 4.15.0-1059.68
linux-image-4.15.0-1066-snapdragon 4.15.0-1066.73
linux-image-4.15.0-66-generic 4.15.0-66.75
linux-image-4.15.0-66-generic-lpae 4.15.0-66.75
linux-image-4.15.0-66-lowlatency 4.15.0-66.75
linux-image-aws 4.15.0.1052.51
linux-image-generic 4.15.0.66.68
linux-image-generic-lpae 4.15.0.66.68
linux-image-gke 4.15.0.1046.49
linux-image-gke-4.15 4.15.0.1046.49
linux-image-kvm 4.15.0.1048.48
linux-image-lowlatency 4.15.0.66.68
linux-image-oem 4.15.0.1059.63
linux-image-oracle 4.15.0.1027.30
linux-image-powerpc-e500mc 4.15.0.66.68
linux-image-powerpc-smp 4.15.0.66.68
linux-image-powerpc64-emb 4.15.0.66.68
linux-image-powerpc64-smp 4.15.0.66.68
linux-image-raspi2 4.15.0.1049.47
linux-image-snapdragon 4.15.0.1066.69
linux-image-virtual 4.15.0.66.68

Ubuntu 16.04 LTS:
linux-image-4.15.0-1027-oracle 4.15.0-1027.30~16.04.1
linux-image-4.15.0-1047-gcp 4.15.0-1047.50
linux-image-4.15.0-1052-aws 4.15.0-1052.54~16.04.1
linux-image-4.15.0-1061-azure 4.15.0-1061.66
linux-image-4.15.0-66-generic 4.15.0-66.75~16.04.1
linux-image-4.15.0-66-generic-lpae 4.15.0-66.75~16.04.1
linux-image-4.15.0-66-lowlatency 4.15.0-66.75~16.04.1
linux-image-aws-hwe 4.15.0.1052.52
linux-image-azure 4.15.0.1061.64
linux-image-gcp 4.15.0.1047.61
linux-image-generic-hwe-16.04 4.15.0.66.86
linux-image-generic-lpae-hwe-16.04 4.15.0.66.86
linux-image-gke 4.15.0.1047.61
linux-image-lowlatency-hwe-16.04 4.15.0.66.86
linux-image-oem 4.15.0.66.86
linux-image-oracle 4.15.0.1027.20
linux-image-virtual-hwe-16.04 4.15.0.66.86

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/4162-1
CVE-2018-21008, CVE-2019-14814, CVE-2019-14815, CVE-2019-14816,
CVE-2019-14821, CVE-2019-15117, CVE-2019-15118, CVE-2019-15505,
CVE-2019-15902, CVE-2019-15918

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.15.0-66.75
https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1052.54
https://launchpad.net/ubuntu/+source/linux-gke-4.15/4.15.0-1046.49
https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1048.48
https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1059.68
https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1027.30
https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1049.53
https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1066.73
https://launchpad.net/ubuntu/+source/linux-aws-hwe/4.15.0-1052.54~16.04.1
https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1061.66
https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1047.50
https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-66.75~16.04.1
https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1027.30~16.04.1

Original Source

Url : http://www.ubuntu.com/usn/USN-4162-1

CWE : Common Weakness Enumeration

% Id Name
22 % CWE-125 Out-of-bounds Read
22 % CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') (CWE/SANS Top 25)
11 % CWE-787 Out-of-bounds Write (CWE/SANS Top 25)
11 % CWE-674 Uncontrolled Recursion
11 % CWE-416 Use After Free
11 % CWE-200 Information Exposure
11 % CWE-119 Failure to Constrain Operations within the Bounds of a Memory Buffer

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 1
Application 1
Application 1
Application 1
Application 1
Application 4
Application 1
Os 4
Os 3
Os 2
Os 3342
Os 2
Os 4
Os 2
Os 1
Os 2
Os 2
Os 1
Os 1
Os 2
Os 1

Alert History

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0
Date Informations
2019-10-22 05:18:41
  • First insertion