CVE-2019-14835

HIGH

Description

A buffer overflow flaw was found, in versions from 2.6.34 to 5.2.x, in the way Linux kernel's vhost functionality that translates virtqueue buffers to IOVs, logged the buffer descriptors during migration. A privileged guest user able to pass descriptors with invalid length to the host when migration is underway, could use this flaw to increase their privileges on the host.

References

http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html

http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html

http://packetstormsecurity.com/files/154572/Kernel-Live-Patch-Security-Notice-LSN-0056-1.html

http://www.openwall.com/lists/oss-security/2019/09/24/1

https://access.redhat.com/errata/RHSA-2019:2827

https://access.redhat.com/errata/RHSA-2019:2828

https://access.redhat.com/errata/RHSA-2019:2829

https://access.redhat.com/errata/RHSA-2019:2830

https://access.redhat.com/errata/RHSA-2019:2854

https://access.redhat.com/errata/RHSA-2019:2862

https://access.redhat.com/errata/RHSA-2019:2863

https://access.redhat.com/errata/RHSA-2019:2864

https://access.redhat.com/errata/RHSA-2019:2865

https://access.redhat.com/errata/RHSA-2019:2866

https://access.redhat.com/errata/RHSA-2019:2867

https://access.redhat.com/errata/RHSA-2019:2869

https://access.redhat.com/errata/RHSA-2019:2889

https://access.redhat.com/errata/RHSA-2019:2899

https://access.redhat.com/errata/RHSA-2019:2900

https://access.redhat.com/errata/RHSA-2019:2901

https://access.redhat.com/errata/RHSA-2019:2924

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14835

https://lists.debian.org/debian-lts-announce/2019/09/msg00025.html

https://lists.fedoraproject.org/archives/list/[email protected]/message/KQFY6JYFIQ2VFQ7QCSXPWTUL5ZDNCJL5/

https://seclists.org/bugtraq/2019/Sep/41

https://usn.ubuntu.com/4135-2/

https://www.debian.org/security/2019/dsa-4531

https://www.openwall.com/lists/oss-security/2019/09/17/1

Details

Source: MITRE

Published: 2019-09-17

Updated: 2019-09-19

Type: CWE-120

Risk Information

CVSS v2.0

Base Score: 7.2

Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Impact Score: 10

Exploitability Score: 3.9

Severity: HIGH