CVE-2018-18021

CVSS V2 Low 3.6 CVSS V3 High 7.1
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.
Overview
  • CVE ID
  • CVE-2018-18021
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Modified
  • Published Version
  • 2018-10-07T06:29:00
  • Last Modified Date
  • 2019-04-03T01:29:03
Weakness Enumerations
CWE URL
CWE-20 http://cwe.mitre.org/data/definitions/20.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 1 OR 4.18.12
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:L/Au:N/C:N/I:P/A:P
  • Access Vector
  • LOCAL
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • PARTIAL
  • Base Score
  • 3.6
  • Severity
  • LOW
  • Exploitability Score
  • 3.9
  • Impact Score
  • 4.9
CVSS Version 3
  • Version
  • 3.0
  • Vector String
  • CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 7.1
  • Base Severity
  • HIGH
  • Exploitability Score
  • 1.8
  • Impact Score
  • 5.2
References
Reference URL Reference Tags
https://www.openwall.com/lists/oss-security/2018/10/02/2 Mailing List Patch Third Party Advisory
https://github.com/torvalds/linux/commit/d26c25a9d19b5976b319af528886f89cf455692d Patch
https://github.com/torvalds/linux/commit/2a3f93459d689d990b3ecfbe782fec89b97d3279 Patch
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.12 Patch
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d26c25a9d19b5976b319af528886f89cf455692d Patch
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2a3f93459d689d990b3ecfbe782fec89b97d3279 Patch
https://www.debian.org/security/2018/dsa-4313 Third Party Advisory
http://www.securityfocus.com/bid/105550 Third Party Advisory VDB Entry
https://usn.ubuntu.com/3821-2/ Third Party Advisory
https://usn.ubuntu.com/3821-1/ Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3656 Third Party Advisory
https://usn.ubuntu.com/3931-2/
https://usn.ubuntu.com/3931-1/
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2018-18021
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18021
History
Created Old Value New Value Data Type Notes
2022-05-10 17:44:43 Added to TrackCVE
2022-12-03 13:00:13 2018-10-07T06:29Z 2018-10-07T06:29:00 CVE Published Date updated
2022-12-03 13:00:13 2019-04-03T01:29:03 CVE Modified Date updated
2022-12-03 13:00:13 Modified Vulnerability Status updated