CVE-2020-27830

Upstream information

CVE-2020-27830 at MITRE

Description

A vulnerability was found in Linux Kernel where in the spk_ttyio_receive_buf2() function, it would dereference spk_ttyio_synth without checking whether it is NULL or not, and may lead to a NULL-ptr deref crash.

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SUSE information

Overall state of this security issue: Resolved

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:N/A:P
Access Vector	Local
Access Complexity	Low
Authentication	None
Confidentiality Impact	None
Integrity Impact	None
Availability Impact	Partial

CVSS v3 Scores

	National Vulnerability Database	SUSE
Base Score	5.5	6.2
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Access Vector	Local	Local
Access Complexity	Low	Low
Privileges Required	Low	None
User Interaction	None	None
Scope	Unchanged	Unchanged
Confidentiality Impact	None	None
Integrity Impact	None	None
Availability Impact	High	High
CVSSv3 Version	3.1	3.1

SUSE Bugzilla entry: 1179656 [NEW]

SUSE Security Advisories:

• SUSE-IU-2021:3-1, published Wed Feb 3 23:45:24 MST 2021
• SUSE-IU-2021:4-1, published Wed Feb 3 23:47:35 MST 2021
• SUSE-IU-2021:7-1, published Wed Feb 10 06:48:24 UTC 2021
• SUSE-SU-2021:0096-1, published Tue Jan 12 16:42:23 MST 2021
• SUSE-SU-2021:0108-1, published Wed Jan 13 07:18:21 MST 2021
• SUSE-SU-2021:0117-1, published Thu Jan 14 01:16:16 MST 2021
• openSUSE-SU-2021:0060-1, published Tue Feb 16 10:27:50 2021
• openSUSE-SU-2021:0242-1, published Tue Feb 16 10:27:50 2021

List of released packages

Product(s)	Fixed package version(s)	References
Image SLES15-SP2-CHOST-BYOS-Aliyun Image SLES15-SP2-CHOST-BYOS-Azure Image SLES15-SP2-CHOST-BYOS-EC2 Image SLES15-SP2-CHOST-BYOS-GCE	kernel-default >= 5.3.18-24.46.1
SUSE Linux Enterprise High Availability 15 SP2	cluster-md-kmp-default >= 5.3.18-24.46.1 dlm-kmp-default >= 5.3.18-24.46.1 gfs2-kmp-default >= 5.3.18-24.46.1 ocfs2-kmp-default >= 5.3.18-24.46.1	Patchnames: SUSE-SLE-Product-HA-15-SP2-2021-117
SUSE Linux Enterprise Module for Basesystem 15 SP2	kernel-default >= 5.3.18-24.46.1 kernel-default-base >= 5.3.18-24.46.1.9.19.1 kernel-default-devel >= 5.3.18-24.46.1 kernel-devel >= 5.3.18-24.46.1 kernel-macros >= 5.3.18-24.46.1 kernel-preempt >= 5.3.18-24.46.1	Patchnames: SUSE-SLE-Module-Basesystem-15-SP2-2021-117
SUSE Linux Enterprise Module for Basesystem 15 SP3	kernel-64kb >= 5.3.18-57.3 kernel-64kb-devel >= 5.3.18-57.3 kernel-default >= 5.3.18-57.3 kernel-default-devel >= 5.3.18-57.3 kernel-devel >= 5.3.18-57.3 kernel-macros >= 5.3.18-57.3 kernel-preempt >= 5.3.18-57.3 kernel-zfcpdump >= 5.3.18-57.3
SUSE Linux Enterprise Module for Development Tools 15 SP2	kernel-docs >= 5.3.18-24.46.1 kernel-obs-build >= 5.3.18-24.46.1 kernel-preempt-devel >= 5.3.18-24.46.1 kernel-source >= 5.3.18-24.46.1 kernel-syms >= 5.3.18-24.46.1	Patchnames: SUSE-SLE-Module-Development-Tools-15-SP2-2021-117
SUSE Linux Enterprise Module for Development Tools 15 SP3	kernel-docs >= 5.3.18-57.3 kernel-obs-build >= 5.3.18-57.3 kernel-preempt-devel >= 5.3.18-57.3 kernel-source >= 5.3.18-57.3 kernel-syms >= 5.3.18-57.1
SUSE Linux Enterprise Module for Legacy 15 SP2	reiserfs-kmp-default >= 5.3.18-24.46.1	Patchnames: SUSE-SLE-Module-Legacy-15-SP2-2021-117
SUSE Linux Enterprise Module for Legacy 15 SP3	reiserfs-kmp-default >= 5.3.18-57.3
SUSE Linux Enterprise Module for Live Patching 15 SP2	kernel-default-livepatch >= 5.3.18-24.46.1 kernel-default-livepatch-devel >= 5.3.18-24.46.1 kernel-livepatch-5_3_18-24_46-default >= 1-5.3.1	Patchnames: SUSE-SLE-Module-Live-Patching-15-SP2-2021-117
SUSE Linux Enterprise Module for Public Cloud 15 SP2	kernel-azure >= 5.3.18-18.32.1 kernel-azure-devel >= 5.3.18-18.32.1 kernel-devel-azure >= 5.3.18-18.32.1 kernel-source-azure >= 5.3.18-18.32.1 kernel-syms-azure >= 5.3.18-18.32.1	Patchnames: SUSE-SLE-Module-Public-Cloud-15-SP2-2021-96
SUSE Linux Enterprise Module for Public Cloud 15 SP3	kernel-azure >= 5.3.18-36.1 kernel-azure-devel >= 5.3.18-36.1 kernel-devel-azure >= 5.3.18-36.1 kernel-source-azure >= 5.3.18-36.1 kernel-syms-azure >= 5.3.18-36.1
SUSE Linux Enterprise Module for Realtime packages 15 SP2	cluster-md-kmp-rt >= 5.3.18-22.1 dlm-kmp-rt >= 5.3.18-22.1 gfs2-kmp-rt >= 5.3.18-22.1 kernel-devel-rt >= 5.3.18-22.1 kernel-rt >= 5.3.18-22.1 kernel-rt-devel >= 5.3.18-22.1 kernel-rt_debug-devel >= 5.3.18-22.1 kernel-source-rt >= 5.3.18-22.1 kernel-syms-rt >= 5.3.18-22.1 ocfs2-kmp-rt >= 5.3.18-22.1	Patchnames: SUSE-SLE-Module-RT-15-SP2-2021-108
SUSE Linux Enterprise Workstation Extension 15 SP2	kernel-default-extra >= 5.3.18-24.46.1	Patchnames: SUSE-SLE-Product-WE-15-SP2-2021-117
openSUSE Leap 15.2	cluster-md-kmp-rt >= 5.3.18-lp152.3.5.1 cluster-md-kmp-rt_debug >= 5.3.18-lp152.3.5.1 dlm-kmp-rt >= 5.3.18-lp152.3.5.1 dlm-kmp-rt_debug >= 5.3.18-lp152.3.5.1 gfs2-kmp-rt >= 5.3.18-lp152.3.5.1 gfs2-kmp-rt_debug >= 5.3.18-lp152.3.5.1 kernel-debug >= 5.3.18-lp152.60.1 kernel-debug-devel >= 5.3.18-lp152.60.1 kernel-default >= 5.3.18-lp152.60.1 kernel-default-devel >= 5.3.18-lp152.60.1 kernel-devel >= 5.3.18-lp152.60.1 kernel-devel-rt >= 5.3.18-lp152.3.5.1 kernel-docs >= 5.3.18-lp152.60.1 kernel-docs-html >= 5.3.18-lp152.60.1 kernel-kvmsmall >= 5.3.18-lp152.60.1 kernel-kvmsmall-devel >= 5.3.18-lp152.60.1 kernel-macros >= 5.3.18-lp152.60.1 kernel-obs-build >= 5.3.18-lp152.60.1 kernel-obs-qa >= 5.3.18-lp152.60.1 kernel-preempt >= 5.3.18-lp152.60.1 kernel-preempt-devel >= 5.3.18-lp152.60.1 kernel-rt >= 5.3.18-lp152.3.5.1 kernel-rt-devel >= 5.3.18-lp152.3.5.1 kernel-rt-extra >= 5.3.18-lp152.3.5.1 kernel-rt_debug >= 5.3.18-lp152.3.5.1 kernel-rt_debug-devel >= 5.3.18-lp152.3.5.1 kernel-rt_debug-extra >= 5.3.18-lp152.3.5.1 kernel-source >= 5.3.18-lp152.60.1 kernel-source-rt >= 5.3.18-lp152.3.5.1 kernel-source-vanilla >= 5.3.18-lp152.60.1 kernel-syms >= 5.3.18-lp152.60.1 kernel-syms-rt >= 5.3.18-lp152.3.5.1 kselftests-kmp-rt >= 5.3.18-lp152.3.5.1 kselftests-kmp-rt_debug >= 5.3.18-lp152.3.5.1 ocfs2-kmp-rt >= 5.3.18-lp152.3.5.1 ocfs2-kmp-rt_debug >= 5.3.18-lp152.3.5.1 reiserfs-kmp-rt >= 5.3.18-lp152.3.5.1 reiserfs-kmp-rt_debug >= 5.3.18-lp152.3.5.1	Patchnames: openSUSE-2021-242 openSUSE-2021-60

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First public cloud image revisions this CVE is fixed in:

• alibaba/sles-15-sp2-chost-byos-v20210202
• alibaba/sles-15-sp2-chost-byos-v20210304
• alibaba/sles-15-sp3-chost-byos-v20210729
• alibaba/sles-15-sp3-chost-byos-v20210827
• amazon/suse-manager-4-2-proxy-byos-v20210924-hvm-ssd-x86_64
• amazon/suse-manager-4-2-server-byos-v20210924-hvm-ssd-x86_64
• amazon/suse-sles-15-sp3-byos-v20210924-hvm-ssd-arm64
• amazon/suse-sles-15-sp3-byos-v20210924-hvm-ssd-x86_64
• amazon/suse-sles-15-sp3-chost-byos-v20210729-hvm-ssd-x86_64
• amazon/suse-sles-15-sp3-chost-byos-v20210827-hvm-ssd-x86_64
• amazon/suse-sles-15-sp3-v20210924-ecs-hvm-ssd-x86_64
• amazon/suse-sles-15-sp3-v20210924-hvm-ssd-arm64
• amazon/suse-sles-15-sp3-v20210924-hvm-ssd-x86_64
• amazon/suse-sles-hpc-15-sp3-byos-v20210924-hvm-ssd-x86_64
• amazon/suse-sles-sap-15-sp3-byos-v20210924-hvm-ssd-x86_64
• google/sles-15-sp2-byos-v20210204
• google/sles-15-sp2-chost-byos-v20210202
• google/sles-15-sp2-sap-byos-v20210204
• google/sles-15-sp2-sap-v20210204
• google/sles-15-sp2-v20210204
• google/sles-15-sp3-byos-v20210812
• google/sles-15-sp3-chost-byos-v20210729
• google/sles-15-sp3-chost-byos-v20210827
• google/sles-15-sp3-sap-byos-v20210812
• google/sles-15-sp3-sap-v20210812
• google/sles-15-sp3-sapcal-v20210812
• google/sles-15-sp3-v20210812
• google/suse-manager-4-1-proxy-byos-v20210209
• google/suse-manager-4-1-server-byos-v20210209
• google/suse-manager-4-2-proxy-byos-v20210812
• google/suse-manager-4-2-server-byos-v20210812
• microsoft/suse-manager-4-1-proxy-byos-v20210218
• microsoft/suse-manager-4-1-proxy-byos-v20210303
• microsoft/suse-manager-4-1-server-byos-v20210218
• microsoft/suse-manager-4-1-server-byos-v20210303
• microsoft/suse-manager-4-2-proxy-byos-v20210924
• microsoft/suse-manager-4-2-server-byos-v20210924
• microsoft/suse-sles-15-sp2-basic-v20210205
• microsoft/suse-sles-15-sp2-byos-v20210216
• microsoft/suse-sles-15-sp2-chost-byos-v20210202
• microsoft/suse-sles-15-sp2-hpc-byos-v20210216
• microsoft/suse-sles-15-sp2-hpc-byos-v20210303
• microsoft/suse-sles-15-sp2-hpc-v20210205
• microsoft/suse-sles-15-sp2-v20210205
• microsoft/suse-sles-15-sp3-basic-v20210924
• microsoft/suse-sles-15-sp3-byos-v20210924
• microsoft/suse-sles-15-sp3-chost-byos-v20210729
• microsoft/suse-sles-15-sp3-chost-byos-v20210827
• microsoft/suse-sles-15-sp3-hpc-byos-v20210924
• microsoft/suse-sles-15-sp3-hpc-v20210924
• microsoft/suse-sles-15-sp3-v20210924
• microsoft/suse-sles-sap-15-sp2-byos-v20210216
• microsoft/suse-sles-sap-15-sp2-byos-v20210303
• microsoft/suse-sles-sap-15-sp2-v20210205
• microsoft/suse-sles-sap-15-sp3-byos-v20210924
• microsoft/suse-sles-sap-15-sp3-v20210924
• oracle/sles-15-sp2-byos-v20210303
• oracle/sles-15-sp2-sap-byos-v20210303

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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
HPE Helion OpenStack 8	kernel-default	Not affected
HPE Helion OpenStack 8	kernel-source	Not affected
SUSE Enterprise Storage 5	kernel-default	Not affected
SUSE Enterprise Storage 5	kernel-source	Not affected
SUSE Linux Enterprise High Performance Computing 12 SP5	kernel-default	Not affected
SUSE Linux Enterprise High Performance Computing 12 SP5	kernel-source	Not affected
SUSE Linux Enterprise High Performance Computing 15 LTSS	kernel-default	Not affected
SUSE Linux Enterprise High Performance Computing 15 LTSS	kernel-source	Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP1	kernel-default	Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP1	kernel-source	Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP2	kernel-default	Released
SUSE Linux Enterprise Module for Basesystem 15 SP2	kernel-source	Released
SUSE Linux Enterprise Module for Development Tools 15 SP1	kernel-default	Not affected
SUSE Linux Enterprise Module for Development Tools 15 SP1	kernel-source	Not affected
SUSE Linux Enterprise Module for Development Tools 15 SP2	kernel-default	Released
SUSE Linux Enterprise Module for Development Tools 15 SP2	kernel-source	Released
SUSE Linux Enterprise Module for Public Cloud 15 SP2	kernel-source-azure	Released
SUSE Linux Enterprise Point of Service 11 SP3	kernel-default	Not affected
SUSE Linux Enterprise Point of Service 11 SP3	kernel-source	Not affected
SUSE Linux Enterprise Point of Service Image Server 12 SP2	kernel-default	Not affected
SUSE Linux Enterprise Point of Service Image Server 12 SP2	kernel-source	Not affected
SUSE Linux Enterprise Server 11 SP4 LTSS	kernel-default	Not affected
SUSE Linux Enterprise Server 11 SP4 LTSS	kernel-source	Not affected
SUSE Linux Enterprise Server 12 SP2 ESPOS	kernel-default	Not affected
SUSE Linux Enterprise Server 12 SP2 ESPOS	kernel-source	Not affected
SUSE Linux Enterprise Server 12 SP2 LTSS	kernel-default	Not affected
SUSE Linux Enterprise Server 12 SP2 LTSS	kernel-source	Not affected
SUSE Linux Enterprise Server 12 SP3 ESPOS	kernel-default	Not affected
SUSE Linux Enterprise Server 12 SP3 ESPOS	kernel-source	Not affected
SUSE Linux Enterprise Server 12 SP3 LTSS	kernel-default	Not affected
SUSE Linux Enterprise Server 12 SP3 LTSS	kernel-source	Not affected
SUSE Linux Enterprise Server 12 SP4 ESPOS	kernel-default	Not affected
SUSE Linux Enterprise Server 12 SP4 ESPOS	kernel-source	Not affected
SUSE Linux Enterprise Server 12 SP4 LTSS	kernel-default	Not affected
SUSE Linux Enterprise Server 12 SP4 LTSS	kernel-source	Not affected
SUSE Linux Enterprise Server 12 SP5	kernel-default	Not affected
SUSE Linux Enterprise Server 12 SP5	kernel-source	Not affected
SUSE Linux Enterprise Server 15 ESPOS	kernel-default	Not affected
SUSE Linux Enterprise Server 15 ESPOS	kernel-source	Not affected
SUSE Linux Enterprise Server 15 LTSS	kernel-default	Not affected
SUSE Linux Enterprise Server 15 LTSS	kernel-source	Not affected
SUSE Linux Enterprise Server BCL 12 SP2	kernel-default	Not affected
SUSE Linux Enterprise Server BCL 12 SP2	kernel-source	Not affected
SUSE Linux Enterprise Server BCL 12 SP3	kernel-default	Not affected
SUSE Linux Enterprise Server BCL 12 SP3	kernel-source	Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP2	kernel-default	Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP2	kernel-source	Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP3	kernel-default	Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP3	kernel-source	Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP4	kernel-default	Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP4	kernel-source	Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP5	kernel-default	Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP5	kernel-source	Not affected
SUSE Linux Enterprise Server for SAP Applications 15	kernel-default	Not affected
SUSE Linux Enterprise Server for SAP Applications 15	kernel-source	Not affected
SUSE OpenStack Cloud 7	kernel-default	Not affected
SUSE OpenStack Cloud 7	kernel-source	Not affected
SUSE OpenStack Cloud 8	kernel-default	Not affected
SUSE OpenStack Cloud 8	kernel-source	Not affected
SUSE OpenStack Cloud 9	kernel-default	Not affected
SUSE OpenStack Cloud 9	kernel-source	Not affected
SUSE OpenStack Cloud Crowbar 8	kernel-default	Not affected
SUSE OpenStack Cloud Crowbar 8	kernel-source	Not affected
SUSE OpenStack Cloud Crowbar 9	kernel-default	Not affected
SUSE OpenStack Cloud Crowbar 9	kernel-source	Not affected
SUSE Real Time Module 15 SP2	kernel-source-rt	Released