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-4157-1 First vendor Publication 2019-10-17
Vendor Ubuntu Last vendor Modification 2019-10-17
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 19.04

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-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 - linux-snapdragon: Linux kernel for Snapdragon processors

Details:

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 91x Wi-Fi driver in the Linux kernel did not properly handle error conditions on initialization, leading to a double-free vulnerability. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2019-15504)

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 IPv6 RDS implementation in the Linux kernel did not properly initialize fields in a data structure returned to user space. A local attacker could use this to expose sensitive information (kernel memory). Please note that the RDS protocol is blacklisted in Ubuntu by default. (CVE-2019-16714)

It was discovered that an integer overflow existed in the Binder implementation of the Linux kernel, leading to a buffer overflow. A local attacker could use this to escalate privileges. (CVE-2019-2181)

Update instructions:

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

Ubuntu 19.04:
linux-image-5.0.0-1019-aws 5.0.0-1019.21
linux-image-5.0.0-1020-kvm 5.0.0-1020.21
linux-image-5.0.0-1020-raspi2 5.0.0-1020.20
linux-image-5.0.0-1021-gcp 5.0.0-1021.21
linux-image-5.0.0-1023-azure 5.0.0-1023.24
linux-image-5.0.0-1024-snapdragon 5.0.0-1024.25
linux-image-5.0.0-32-generic 5.0.0-32.34
linux-image-5.0.0-32-generic-lpae 5.0.0-32.34
linux-image-5.0.0-32-lowlatency 5.0.0-32.34
linux-image-aws 5.0.0.1019.20
linux-image-azure 5.0.0.1023.22
linux-image-gcp 5.0.0.1021.47
linux-image-generic 5.0.0.32.33
linux-image-generic-lpae 5.0.0.32.33
linux-image-gke 5.0.0.1021.47
linux-image-kvm 5.0.0.1020.20
linux-image-lowlatency 5.0.0.32.33
linux-image-raspi2 5.0.0.1020.17
linux-image-snapdragon 5.0.0.1024.17
linux-image-virtual 5.0.0.32.33

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/4157-1
CVE-2019-14814, CVE-2019-14815, CVE-2019-14816, CVE-2019-14821,
CVE-2019-15504, CVE-2019-15505, CVE-2019-15902, CVE-2019-16714,
CVE-2019-2181

Package Information:
https://launchpad.net/ubuntu/+source/linux/5.0.0-32.34
https://launchpad.net/ubuntu/+source/linux-aws/5.0.0-1019.21
https://launchpad.net/ubuntu/+source/linux-azure/5.0.0-1023.24
https://launchpad.net/ubuntu/+source/linux-gcp/5.0.0-1021.21
https://launchpad.net/ubuntu/+source/linux-kvm/5.0.0-1020.21
https://launchpad.net/ubuntu/+source/linux-raspi2/5.0.0-1020.20
https://launchpad.net/ubuntu/+source/linux-snapdragon/5.0.0-1024.25

Original Source

Url : http://www.ubuntu.com/usn/USN-4157-1

CWE : Common Weakness Enumeration

% Id Name
25 % CWE-787 Out-of-bounds Write (CWE/SANS Top 25)
25 % CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') (CWE/SANS Top 25)
12 % CWE-415 Double Free
12 % CWE-200 Information Exposure
12 % CWE-190 Integer Overflow or Wraparound (CWE/SANS Top 25)
12 % CWE-125 Out-of-bounds Read

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 1
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
2019-10-17 09:19:09
  • First insertion