Executive Summary

Summary
Title Linux kernel vulnerabilities
Informations
Name USN-4069-1 First vendor Publication 2019-07-23
Vendor Ubuntu Last vendor Modification 2019-07-23
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 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:

It was discovered that an integer overflow existed in the Linux kernel when reference counting pages, leading to potential use-after-free issues. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-11487)

Jann Horn discovered that a race condition existed in the Linux kernel when performing core dumps. A local attacker could use this to cause a denial of service (system crash) or expose sensitive information. (CVE-2019-11599)

It was discovered that the ext4 file system implementation in the Linux kernel did not properly zero out memory in some situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2019-11833)

It was discovered that the Bluetooth Human Interface Device Protocol (HIDP) implementation in the Linux kernel did not properly verify strings were NULL terminated in certain situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2019-11884)

Update instructions:

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

Ubuntu 19.04:
linux-image-5.0.0-1011-aws 5.0.0-1011.12
linux-image-5.0.0-1011-gcp 5.0.0-1011.11
linux-image-5.0.0-1011-kvm 5.0.0-1011.12
linux-image-5.0.0-1012-azure 5.0.0-1012.12
linux-image-5.0.0-1013-raspi2 5.0.0-1013.13
linux-image-5.0.0-1017-snapdragon 5.0.0-1017.18
linux-image-5.0.0-21-generic 5.0.0-21.22
linux-image-5.0.0-21-generic-lpae 5.0.0-21.22
linux-image-5.0.0-21-lowlatency 5.0.0-21.22
linux-image-aws 5.0.0.1011.11
linux-image-azure 5.0.0.1012.11
linux-image-gcp 5.0.0.1011.11
linux-image-generic 5.0.0.21.22
linux-image-generic-lpae 5.0.0.21.22
linux-image-gke 5.0.0.1011.11
linux-image-kvm 5.0.0.1011.11
linux-image-lowlatency 5.0.0.21.22
linux-image-raspi2 5.0.0.1013.10
linux-image-snapdragon 5.0.0.1017.10
linux-image-virtual 5.0.0.21.22

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/4069-1
CVE-2019-11487, CVE-2019-11599, CVE-2019-11833, CVE-2019-11884

Package Information:
https://launchpad.net/ubuntu/+source/linux/5.0.0-21.22
https://launchpad.net/ubuntu/+source/linux-aws/5.0.0-1011.12
https://launchpad.net/ubuntu/+source/linux-azure/5.0.0-1012.12
https://launchpad.net/ubuntu/+source/linux-gcp/5.0.0-1011.11
https://launchpad.net/ubuntu/+source/linux-kvm/5.0.0-1011.12
https://launchpad.net/ubuntu/+source/linux-raspi2/5.0.0-1013.13
https://launchpad.net/ubuntu/+source/linux-snapdragon/5.0.0-1017.18

Original Source

Url : http://www.ubuntu.com/usn/USN-4069-1

CWE : Common Weakness Enumeration

% Id Name
50 % CWE-667 Insufficient Locking
50 % CWE-416 Use After Free

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 3300

Alert History

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0
1
Date Informations
2019-08-02 12:13:52
  • Multiple Updates
2019-07-23 09:18:56
  • First insertion