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UbuntuUSN-3836-2

HistoryDec 04, 2018 - 12:00 a.m.

Linux kernel (HWE) vulnerabilities

2018-12-0400:00:00

ubuntu.com

7 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

5.5 Medium

AI Score

Confidence

Low

4.4 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:M/Au:N/C:P/I:P/A:P

0.001 Low

EPSS

Percentile

43.5%

JSON

Releases

Ubuntu 16.04 ESM

Packages

linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
linux-hwe - Linux hardware enablement (HWE) kernel

Details

USN-3836-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 18.04 LTS for Ubuntu
16.04 LTS.

Jann Horn discovered that the Linux kernel mishandles mapping UID or GID
ranges inside nested user namespaces in some situations. A local attacker
could use this to bypass access controls on resources outside the
namespace. (CVE-2018-18955)

Philipp Wendler discovered that the overlayfs implementation in the Linux
kernel did not properly verify the directory contents permissions from
within a unprivileged user namespace. A local attacker could use this to
expose sensitive information (protected file names). (CVE-2018-6559)

OSVersionArchitecturePackageVersionFilename
Ubuntu16.04noarchlinux-image-4.15.0-42-generic< 4.15.0-42.45~16.04.1UNKNOWN
Ubuntu16.04noarchblock-modules-4.15.0-42-generic-di< 4.15.0-42.45~16.04.1UNKNOWN
Ubuntu16.04noarchcrypto-modules-4.15.0-42-generic-di< 4.15.0-42.45~16.04.1UNKNOWN
Ubuntu16.04noarchfat-modules-4.15.0-42-generic-di< 4.15.0-42.45~16.04.1UNKNOWN
Ubuntu16.04noarchfb-modules-4.15.0-42-generic-di< 4.15.0-42.45~16.04.1UNKNOWN
Ubuntu16.04noarchfirewire-core-modules-4.15.0-42-generic-di< 4.15.0-42.45~16.04.1UNKNOWN
Ubuntu16.04noarchfloppy-modules-4.15.0-42-generic-di< 4.15.0-42.45~16.04.1UNKNOWN
Ubuntu16.04noarchfs-core-modules-4.15.0-42-generic-di< 4.15.0-42.45~16.04.1UNKNOWN
Ubuntu16.04noarchfs-secondary-modules-4.15.0-42-generic-di< 4.15.0-42.45~16.04.1UNKNOWN
Ubuntu16.04noarchinput-modules-4.15.0-42-generic-di< 4.15.0-42.45~16.04.1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
Ubuntu	16.04	noarch	linux-image-4.15.0-42-generic	< 4.15.0-42.45~16.04.1	UNKNOWN
Ubuntu	16.04	noarch	block-modules-4.15.0-42-generic-di	< 4.15.0-42.45~16.04.1	UNKNOWN
Ubuntu	16.04	noarch	crypto-modules-4.15.0-42-generic-di	< 4.15.0-42.45~16.04.1	UNKNOWN
Ubuntu	16.04	noarch	fat-modules-4.15.0-42-generic-di	< 4.15.0-42.45~16.04.1	UNKNOWN
Ubuntu	16.04	noarch	fb-modules-4.15.0-42-generic-di	< 4.15.0-42.45~16.04.1	UNKNOWN
Ubuntu	16.04	noarch	firewire-core-modules-4.15.0-42-generic-di	< 4.15.0-42.45~16.04.1	UNKNOWN
Ubuntu	16.04	noarch	floppy-modules-4.15.0-42-generic-di	< 4.15.0-42.45~16.04.1	UNKNOWN
Ubuntu	16.04	noarch	fs-core-modules-4.15.0-42-generic-di	< 4.15.0-42.45~16.04.1	UNKNOWN
Ubuntu	16.04	noarch	fs-secondary-modules-4.15.0-42-generic-di	< 4.15.0-42.45~16.04.1	UNKNOWN
Ubuntu	16.04	noarch	input-modules-4.15.0-42-generic-di	< 4.15.0-42.45~16.04.1	UNKNOWN