CVE-2019-14821 (GCVE-0-2019-14821)

Vulnerability from cvelistv5 – Published: 2019-09-19 17:37 – Updated: 2024-08-05 00:26
VLAI?
Summary
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.
Severity ?
7.5 (High)
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H
CWE
Assigner
References
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2… x_refsource_CONFIRM
http://www.openwall.com/lists/oss-security/2019/09/20/1 mailing-listx_refsource_MLIST
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.debian.org/debian-lts-announce/2019… mailing-listx_refsource_MLIST
https://seclists.org/bugtraq/2019/Sep/41 mailing-listx_refsource_BUGTRAQ
https://www.debian.org/security/2019/dsa-4531 vendor-advisoryx_refsource_DEBIAN
https://lists.debian.org/debian-lts-announce/2019… mailing-listx_refsource_MLIST
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://security.netapp.com/advisory/ntap-2019100… x_refsource_CONFIRM
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://usn.ubuntu.com/4157-1/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4162-1/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4157-2/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4163-1/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4163-2/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4162-2/ vendor-advisoryx_refsource_UBUNTU
http://packetstormsecurity.com/files/154951/Kerne… x_refsource_MISC
https://access.redhat.com/errata/RHSA-2019:3309 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:3517 vendor-advisoryx_refsource_REDHAT
https://seclists.org/bugtraq/2019/Nov/11 mailing-listx_refsource_BUGTRAQ
http://packetstormsecurity.com/files/155212/Slack… x_refsource_MISC
https://access.redhat.com/errata/RHSA-2019:3978 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:3979 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:4154 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:4256 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2020:0027 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2020:0204 vendor-advisoryx_refsource_REDHAT
https://www.oracle.com/security-alerts/cpuapr2020.html x_refsource_MISC
Impacted products
Vendor Product Version
Linux Kernel Affected: all through 5.3
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      "descriptions": "[{\"lang\": \"en\", \"value\": \"An out-of-bounds access issue was found in the Linux kernel, all versions through 5.3, in the way Linux kernel\u0027s KVM hypervisor implements the Coalesced MMIO write operation. It operates on an MMIO ring buffer \u0027struct kvm_coalesced_mmio\u0027 object, wherein write indices \u0027ring-\u003efirst\u0027 and \u0027ring-\u003elast\u0027 value could be supplied by a host user-space process. An unprivileged host user or process with access to \u0027/dev/kvm\u0027 device could use this flaw to crash the host kernel, resulting in a denial of service or potentially escalating privileges on the system.\"}, {\"lang\": \"es\", \"value\": \"Se encontr\\u00f3 un problema de acceso fuera de l\\u00edmites en el kernel de Linux, todas las versiones hasta 5.3, en la manera en que el hipervisor KVM del kernel de Linux implementa la operaci\\u00f3n de escritura MMIO Coalesced. Opera en un objeto MMIO ring buffer \\\"struct kvm_coalesced_mmio\\\", en donde los \\u00edndices de escritura \\\"ring-)first\\\" y \\\"ring-)last\\\" podr\\u00edan ser suministrados por un proceso de espacio de usuario del host. Un usuario o proceso host no privilegiado con acceso al dispositivo \\\"/dev/kvm\\\" podr\\u00eda usar esta falla para bloquear el kernel host, resultando en una denegaci\\u00f3n de servicio o la escalada de manera potencial de los privilegios en el sistema.\"}]",
      "id": "CVE-2019-14821",
      "lastModified": "2024-11-21T04:27:25.990",
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      "published": "2019-09-19T18:15:10.700",
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  }
}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.