National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2019-14821 Detail

Current Description

An out-of-bounds access issue was found in the Linux kernel, all versions through 5.3, in the way Linux kernel's KVM hypervisor implements the Coalesced MMIO write operation. It operates on an MMIO ring buffer 'struct kvm_coalesced_mmio' object, wherein write indices 'ring->first' and 'ring->last' value could be supplied by a host user-space process. An unprivileged host user or process with access to '/dev/kvm' device could use this flaw to crash the host kernel, resulting in a denial of service or potentially escalating privileges on the system.

Source:  MITRE
View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score: 8.8 HIGH
Vector:  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Nist CVSS score does not match with CNA score
CNA:  Red Hat, Inc.
Base Score: 7.5 HIGH
Vector:  CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00036.html
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00037.html
http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html
http://packetstormsecurity.com/files/155212/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html
http://www.openwall.com/lists/oss-security/2019/09/20/1 Patch Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3309
https://access.redhat.com/errata/RHSA-2019:3517
https://access.redhat.com/errata/RHSA-2019:3978
https://access.redhat.com/errata/RHSA-2019:3979
https://access.redhat.com/errata/RHSA-2019:4154
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14821 Issue Tracking Mitigation Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/09/msg00025.html
https://lists.debian.org/debian-lts-announce/2019/10/msg00000.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TRZQQQANZWQMPILZV7OTS3RGGRLLE2Q7/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YW3QNMPENPFEGVTOFPSNOBL7JEIJS25P/
https://seclists.org/bugtraq/2019/Nov/11
https://seclists.org/bugtraq/2019/Sep/41
https://security.netapp.com/advisory/ntap-20191004-0001/
https://usn.ubuntu.com/4157-1/
https://usn.ubuntu.com/4157-2/
https://usn.ubuntu.com/4162-1/
https://usn.ubuntu.com/4162-2/
https://usn.ubuntu.com/4163-1/
https://usn.ubuntu.com/4163-2/
https://www.debian.org/security/2019/dsa-4531

Weakness Enumeration

CWE-ID CWE Name Source
CWE-787 Out-of-bounds Write NIST   Red Hat, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
5.3

Configuration 2 ( hide )
 cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

19 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-14821
NVD Published Date:
09/19/2019
NVD Last Modified:
09/23/2019