Vulnerability CVE-2019-14835


Published: 2019-09-17

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.

Type:

CWE-120

(Buffer Copy without Checking Size of Input ('Classic Buffer Overflow'))

CVSS2 => (AV:L/AC:L/Au:N/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.2/10
10/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
Redhat -> Enterprise linux 
Redhat -> Virtualization 
Linux -> Linux kernel 
Canonical -> Ubuntu linux 

 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/package-announce@lists.fedoraproject.org/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

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