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:

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