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.


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


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: It is possible that the NVD CVSS may not match that of the CNA. The most common reason for this is that publicly available information does not provide sufficient detail or that information simply was not available at the time the CVSS vector string was assigned.

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://access.redhat.com/errata/RHSA-2019:4256
https://access.redhat.com/errata/RHSA-2020:0027
https://access.redhat.com/errata/RHSA-2020:0204
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
https://www.oracle.com/security-alerts/cpuapr2020.html

Weakness Enumeration

CWE-ID CWE Name Source
CWE-787 Out-of-bounds Write cwe source acceptance level NIST   Reference acceptance level Red Hat, Inc.  

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Change History

23 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
Source:
Red Hat, Inc.