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
NameUSN-3903-1First vendor Publication2019-03-06
VendorUbuntuLast vendor Modification2019-03-06
Severity (Vendor) N/ARevisionN/A

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:M/Au:N/C:C/I:C/A:C)
Cvss Base Score6.9Attack RangeLocal
Cvss Impact Score10Attack ComplexityMedium
Cvss Expoit Score3.4AuthenticationNone Required
Calculate full CVSS 2.0 Vectors scores

Detail

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

- Ubuntu 18.10

Summary:

Several security issues were fixed in the Linux kernel.

Software Description: - linux: Linux kernel - 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

Details:

Jason Wang discovered that the vhost net driver in the Linux kernel contained an out of bounds write vulnerability. An attacker in a guest virtual machine could use this to cause a denial of service (host system crash) or possibly execute arbitrary code in the host kernel. (CVE-2018-16880)

Jann Horn discovered that the userfaultd implementation in the Linux kernel did not properly restrict access to certain ioctls. A local attacker could use this possibly to modify files. (CVE-2018-18397)

Jann Horn discovered a race condition in the fork() system call in the Linux kernel. A local attacker could use this to gain access to services that cache authorizations. (CVE-2019-6133)

Update instructions:

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

Ubuntu 18.10:
linux-image-4.18.0-1007-gcp 4.18.0-1007.8
linux-image-4.18.0-1008-kvm 4.18.0-1008.8
linux-image-4.18.0-1010-raspi2 4.18.0-1010.12
linux-image-4.18.0-1013-azure 4.18.0-1013.13
linux-image-4.18.0-16-generic 4.18.0-16.17
linux-image-4.18.0-16-generic-lpae 4.18.0-16.17
linux-image-4.18.0-16-lowlatency 4.18.0-16.17
linux-image-4.18.0-16-snapdragon 4.18.0-16.17
linux-image-azure 4.18.0.1013.14
linux-image-gcp 4.18.0.1007.7
linux-image-generic 4.18.0.16.17
linux-image-generic-lpae 4.18.0.16.17
linux-image-gke 4.18.0.1007.7
linux-image-kvm 4.18.0.1008.8
linux-image-lowlatency 4.18.0.16.17
linux-image-raspi2 4.18.0.1010.7
linux-image-snapdragon 4.18.0.16.17

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-3903-1
CVE-2018-16880, CVE-2018-18397, CVE-2019-6133

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.18.0-16.17
https://launchpad.net/ubuntu/+source/linux-azure/4.18.0-1013.13
https://launchpad.net/ubuntu/+source/linux-gcp/4.18.0-1007.8
https://launchpad.net/ubuntu/+source/linux-kvm/4.18.0-1008.8
https://launchpad.net/ubuntu/+source/linux-raspi2/4.18.0-1010.12

Original Source

Url : http://www.ubuntu.com/usn/USN-3903-1

CWE : Common Weakness Enumeration

%idName
67 %CWE-284Access Control (Authorization) Issues
33 %CWE-787Out-of-bounds Write (CWE/SANS Top 25)

CPE : Common Platform Enumeration

TypeDescriptionCount
Application1
Application1
Application1
Os5
Os1
Os2757
Os2
Os2
Os3
Os3
Os2
Os2

Alert History

If you want to see full details history, please login or register.
0
DateInformations
2019-03-06 21:18:46
  • First insertion