Executive Summary

Summary
Title Linux kernel vulnerabilities
Informations
NameUSN-3901-1First vendor Publication2019-03-05
VendorUbuntuLast vendor Modification2019-03-05
Severity (Vendor) N/ARevisionN/A

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:M/Au:N/C:P/I:P/A:P)
Cvss Base Score4.4Attack RangeLocal
Cvss Impact Score6.4Attack 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 18.04 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-gcp: Linux kernel for Google Cloud Platform (GCP) 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

Details:

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)

It was discovered that the crypto subsystem of the Linux kernel leaked uninitialized memory to user space in some situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2018-19854)

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 18.04 LTS:
linux-image-4.15.0-1009-oracle 4.15.0-1009.11
linux-image-4.15.0-1028-gcp 4.15.0-1028.29
linux-image-4.15.0-1030-kvm 4.15.0-1030.30
linux-image-4.15.0-1032-raspi2 4.15.0-1032.34
linux-image-4.15.0-1033-aws 4.15.0-1033.35
linux-image-4.15.0-1034-oem 4.15.0-1034.39
linux-image-4.15.0-46-generic 4.15.0-46.49
linux-image-4.15.0-46-generic-lpae 4.15.0-46.49
linux-image-4.15.0-46-lowlatency 4.15.0-46.49
linux-image-4.15.0-46-snapdragon 4.15.0-46.49
linux-image-aws 4.15.0.1033.32
linux-image-gcp 4.15.0.1028.30
linux-image-generic 4.15.0.46.48
linux-image-generic-lpae 4.15.0.46.48
linux-image-gke 4.15.0.1028.30
linux-image-kvm 4.15.0.1030.30
linux-image-lowlatency 4.15.0.46.48
linux-image-oem 4.15.0.1034.39
linux-image-oracle 4.15.0.1009.12
linux-image-raspi2 4.15.0.1032.30
linux-image-snapdragon 4.15.0.46.48

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-3901-1
CVE-2018-18397, CVE-2018-19854, CVE-2019-6133

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.15.0-46.49
https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1033.35
https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1028.29
https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1030.30
https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1034.39
https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1009.11
https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1032.34

Original Source

Url : http://www.ubuntu.com/usn/USN-3901-1

CWE : Common Weakness Enumeration

%idName
67 %CWE-284Access Control (Authorization) Issues
33 %CWE-200Information Exposure

CPE : Common Platform Enumeration

TypeDescriptionCount
Application1
Application1
Application1
Os5
Os1
Os2715
Os2
Os2
Os3
Os3
Os2
Os2

Alert History

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0
DateInformations
2019-03-06 00:18:36
  • First insertion