CVE-2018-18021
CVE-2018-18021, security advisory, novell, suse linux, suse, security, cve

CVE-2018-18021

Common Vulnerabilities and Exposures

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Upstream information

CVE-2018-18021 at MITRE

Description

arch/arm64/kvm/guest.c in KVM in the Linux kernel before 4.18.12 on the arm64 platform mishandles the KVM_SET_ON_REG ioctl. This is exploitable by attackers who can create virtual machines. An attacker can arbitrarily redirect the hypervisor flow of control (with full register control). An attacker can also cause a denial of service (hypervisor panic) via an illegal exception return. This occurs because of insufficient restrictions on userspace access to the core register file, and because PSTATE.M validation does not prevent unintended execution modes.

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 3.6
Vector AV:L/AC:L/Au:N/C:N/I:P/A:P
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact Partial
Availability Impact Partial
CVSS v3 Scores
  National Vulnerability Database SUSE
Base Score 7.1 3.9
Vector AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L
Access Vector Local Local
Access Complexity Low High
Privileges Required Low High
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact None Low
Integrity Impact High Low
Availability Impact High Low
SUSE Bugzilla entry: 1110998 [RESOLVED / FIXED]

No SUSE Security Announcements cross referenced.


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Please note that this evaluation state might be work in progress, incomplete or outdated.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 Already fixed
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 Basesystem 15 SP1 kernel-source Analysis
SUSE Linux Enterprise Module for Development Tools 15 GA kernel-source Released
SUSE Linux Enterprise Module for Development Tools 15 SP1 kernel-source Analysis
SUSE Linux Enterprise Server 11 SP3 LTSS kernel-source Not affected
SUSE Linux Enterprise Server 11 SP4 kernel-source Not affected
SUSE Linux Enterprise Server 11 SP4 LTSS kernel-source Not affected
SUSE Linux Enterprise Server 12 GA LTSS kernel-source Not affected
SUSE Linux Enterprise Server 12 SP1 LTSS kernel-source Analysis
SUSE Linux Enterprise Server 12 SP2 LTSS kernel-source Not affected
SUSE Linux Enterprise Server 12 SP3 kernel-source Already fixed
SUSE Linux Enterprise Server 12 SP3 LTSS kernel-source Analysis
SUSE Linux Enterprise Server 12 SP4 kernel-source Released
SUSE Linux Enterprise Server for SAP Applications 11 SP3 kernel-source Not affected
SUSE Linux Enterprise Server for SAP Applications 12 GA kernel-source 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-source Already fixed
SUSE Linux Enterprise Server for SAP Applications 12 SP4 kernel-source Released