CVE-2018-18397

Upstream information

CVE-2018-18397 at MITRE

Description

The userfaultfd implementation in the Linux kernel before 4.19.7 mishandles access control for certain UFFDIO_ ioctl calls, as demonstrated by allowing local users to write data into holes in a tmpfs file (if the user has read-only access to that file, and that file contains holes), related to fs/userfaultfd.c and mm/userfaultfd.c.

SUSE information

Overall state of this security issue: Running

This issue is currently rated as having moderate severity.

CVSS v2 Scores
	National Vulnerability Database
Base Score	2.1
Vector	AV:L/AC:L/Au:N/C:N/I:P/A:N
Access Vector	Local
Access Complexity	Low
Authentication	None
Confidentiality Impact	None
Integrity Impact	Partial
Availability Impact	None

CVSS v3 Scores
	National Vulnerability Database	SUSE
Base Score	5.5	6.1
Vector	AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N	AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
Access Vector	Local	Local
Access Complexity	Low	Low
Privileges Required	Low	Low
User Interaction	None	None
Scope	Unchanged	Unchanged
Confidentiality Impact	None	Low
Integrity Impact	High	High
Availability Impact	None	None

SUSE Bugzilla entry: 1117656 [NEW]

SUSE Security Advisories:

SUSE-SU-2019:0150-1, published Wed Jan 23 16:09:53 MST 2019
SUSE-SU-2019:0196-1, published Tue Jan 29 10:09:27 MST 2019
SUSE-SU-2019:0222-1, published Fri Feb 1 13:11:47 MST 2019
SUSE-SU-2019:0224-1, published Fri Feb 1 16:10:06 MST 2019
openSUSE-SU-2019:0065-1, published Fri, 18 Jan 2019 00:13:13 +0100 (CET)

List of released packages

Product(s)	Fixed package version(s)	References
SUSE Linux Enterprise Build System Kit 12 SP4	`kernel-zfcpdump >= 4.12.14-95.6.1`	Patchnames: SUSE-SLE-BSK-12-SP4-2019-196
SUSE Linux Enterprise Desktop 12 SP4	`kernel-default >= 4.12.14-95.6.1` `kernel-default-devel >= 4.12.14-95.6.1` `kernel-default-extra >= 4.12.14-95.6.1` `kernel-devel >= 4.12.14-95.6.1` `kernel-macros >= 4.12.14-95.6.1` `kernel-source >= 4.12.14-95.6.1` `kernel-syms >= 4.12.14-95.6.1`	Patchnames: SUSE-SLE-DESKTOP-12-SP4-2019-196
SUSE Linux Enterprise High Availability 12 SP4	`cluster-md-kmp-default >= 4.12.14-95.6.1` `dlm-kmp-default >= 4.12.14-95.6.1` `gfs2-kmp-default >= 4.12.14-95.6.1` `kernel-default >= 4.12.14-95.6.1` `ocfs2-kmp-default >= 4.12.14-95.6.1`	Patchnames: SUSE-SLE-HA-12-SP4-2019-196
SUSE Linux Enterprise High Availability 15	`cluster-md-kmp-default >= 4.12.14-25.28.1` `dlm-kmp-default >= 4.12.14-25.28.1` `gfs2-kmp-default >= 4.12.14-25.28.1` `kernel-default >= 4.12.14-25.28.1` `ocfs2-kmp-default >= 4.12.14-25.28.1`	Patchnames: SUSE-SLE-Product-HA-15-2019-224
SUSE Linux Enterprise Live Patching 12 SP4	`kgraft-patch-4_12_14-95_6-default >= 1-6.3.1` `kgraft-patch-SLE12-SP4_Update_2 >= 1-6.3.1`	Patchnames: SUSE-SLE-Live-Patching-12-SP4-2019-196
SUSE Linux Enterprise Module for Basesystem 15	`kernel-default >= 4.12.14-25.28.1` `kernel-default-base >= 4.12.14-25.28.1` `kernel-default-devel >= 4.12.14-25.28.1` `kernel-default-man >= 4.12.14-25.28.1` `kernel-devel >= 4.12.14-25.28.1` `kernel-macros >= 4.12.14-25.28.1` `kernel-source >= 4.12.14-25.28.1` `kernel-zfcpdump >= 4.12.14-25.28.1`	Patchnames: SUSE-SLE-Module-Basesystem-15-2019-224
SUSE Linux Enterprise Module for Development Tools 15	`kernel-docs >= 4.12.14-25.28.1` `kernel-obs-build >= 4.12.14-25.28.1` `kernel-source >= 4.12.14-25.28.1` `kernel-syms >= 4.12.14-25.28.1` `kernel-vanilla >= 4.12.14-25.28.1` `kernel-vanilla-base >= 4.12.14-25.28.1`	Patchnames: SUSE-SLE-Module-Development-Tools-15-2019-224
SUSE Linux Enterprise Module for Legacy Software 15	`kernel-default >= 4.12.14-25.28.1` `reiserfs-kmp-default >= 4.12.14-25.28.1`	Patchnames: SUSE-SLE-Module-Legacy-15-2019-224
SUSE Linux Enterprise Module for Live Patching 15	`kernel-default >= 4.12.14-25.28.1` `kernel-default-livepatch >= 4.12.14-25.28.1` `kernel-livepatch-4_12_14-25_28-default >= 1-1.3.1` `kernel-livepatch-SLE15_Update_8 >= 1-1.3.1`	Patchnames: SUSE-SLE-Module-Live-Patching-15-2019-224
SUSE Linux Enterprise Module for Open Buildservice Development Tools 15	`kernel-default >= 4.12.14-25.28.1` `kernel-default-base >= 4.12.14-25.28.1` `kernel-docs >= 4.12.14-25.28.1` `kernel-docs-html >= 4.12.14-25.28.1` `kernel-obs-qa >= 4.12.14-25.28.1` `kselftests-kmp-default >= 4.12.14-25.28.1`	Patchnames: SUSE-SLE-Module-Development-Tools-OBS-15-2019-224
SUSE Linux Enterprise Module for Public Cloud 15	`kernel-azure >= 4.12.14-5.19.1` `kernel-azure-base >= 4.12.14-5.19.1` `kernel-azure-devel >= 4.12.14-5.19.1` `kernel-devel-azure >= 4.12.14-5.19.1` `kernel-source-azure >= 4.12.14-5.19.1` `kernel-syms-azure >= 4.12.14-5.19.1`	Patchnames: SUSE-SLE-Module-Public-Cloud-15-2019-150
SUSE Linux Enterprise Server 12 SP4	`kernel-azure >= 4.12.14-6.6.2` `kernel-azure-base >= 4.12.14-6.6.2` `kernel-azure-devel >= 4.12.14-6.6.2` `kernel-default >= 4.12.14-95.6.1` `kernel-default-base >= 4.12.14-95.6.1` `kernel-default-devel >= 4.12.14-95.6.1` `kernel-default-man >= 4.12.14-95.6.1` `kernel-devel >= 4.12.14-95.6.1` `kernel-devel-azure >= 4.12.14-6.6.2` `kernel-macros >= 4.12.14-95.6.1` `kernel-source >= 4.12.14-95.6.1` `kernel-source-azure >= 4.12.14-6.6.2` `kernel-syms >= 4.12.14-95.6.1` `kernel-syms-azure >= 4.12.14-6.6.2`	Patchnames: SUSE-SLE-SERVER-12-SP4-2019-196 SUSE-SLE-SERVER-12-SP4-2019-222
SUSE Linux Enterprise Server for SAP Applications 12 SP4	`kernel-azure >= 4.12.14-6.6.2` `kernel-azure-base >= 4.12.14-6.6.2` `kernel-azure-devel >= 4.12.14-6.6.2` `kernel-default >= 4.12.14-95.6.1` `kernel-default-base >= 4.12.14-95.6.1` `kernel-default-devel >= 4.12.14-95.6.1` `kernel-default-man >= 4.12.14-95.6.1` `kernel-devel >= 4.12.14-95.6.1` `kernel-devel-azure >= 4.12.14-6.6.2` `kernel-macros >= 4.12.14-95.6.1` `kernel-source >= 4.12.14-95.6.1` `kernel-source-azure >= 4.12.14-6.6.2` `kernel-syms >= 4.12.14-95.6.1` `kernel-syms-azure >= 4.12.14-6.6.2`	Patchnames: SUSE-SLE-SERVER-12-SP4-2019-196 SUSE-SLE-SERVER-12-SP4-2019-222
SUSE Linux Enterprise Software Development Kit 12 SP4	`kernel-docs >= 4.12.14-95.6.1` `kernel-obs-build >= 4.12.14-95.6.1`	Patchnames: SUSE-SLE-SDK-12-SP4-2019-196
SUSE Linux Enterprise Workstation Extension 12 SP4	`kernel-default >= 4.12.14-95.6.1` `kernel-default-extra >= 4.12.14-95.6.1`	Patchnames: SUSE-SLE-WE-12-SP4-2019-196
SUSE Linux Enterprise Workstation Extension 15	`kernel-default >= 4.12.14-25.28.1` `kernel-default-extra >= 4.12.14-25.28.1`	Patchnames: SUSE-SLE-Product-WE-15-2019-224

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.

Product(s)	Source package	State
SUSE Linux Enterprise Desktop 12 SP3	kernel-source	Analysis
SUSE Linux Enterprise Desktop 12 SP4	kernel-source	Released
SUSE Linux Enterprise High Performance Computing 12	kernel-source	Released
SUSE Linux Enterprise Module for Basesystem 15 GA	kernel-source	Released
SUSE Linux Enterprise Module for Development Tools 15 GA	kernel-source	Released
SUSE Linux Enterprise Server 11 SP3 LTSS	kernel-source	Analysis
SUSE Linux Enterprise Server 11 SP4	kernel-source	Analysis
SUSE Linux Enterprise Server 12 GA LTSS	kernel-source	Analysis
SUSE Linux Enterprise Server 12 SP2 LTSS	kernel-source	Analysis
SUSE Linux Enterprise Server 12 SP3	kernel-source	Analysis
SUSE Linux Enterprise Server 12 SP4	kernel-source	Released
SUSE Linux Enterprise Server for SAP Applications 11 SP3	kernel-source	Analysis
SUSE Linux Enterprise Server for SAP Applications 12 GA	kernel-source	Analysis
SUSE Linux Enterprise Server for SAP Applications 12 SP2	kernel-source	Analysis
SUSE Linux Enterprise Server for SAP Applications 12 SP4	kernel-source	Released