CVE-2016-9637

HIGH

Citrix XenServer - Privilege Escalation via Out-of-Range I/O Port Access

Title source: llm
STIX 2.1

Description

The (1) ioport_read and (2) ioport_write functions in Xen, when qemu is used as a device model within Xen, might allow local x86 HVM guest OS administrators to gain qemu process privileges via vectors involving an out-of-range ioport access.

References (7)

Core 7
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/94699
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/201612-56
Mailing List mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2018/02/msg00005.html
Various Sources x_refsource_confirm
http://xenbits.xen.org/xsa/advisory-199.html
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1037397
Vendor Advisory vendor-advisory x_refsource_redhat
http://rhn.redhat.com/errata/RHSA-2016-2963.html
Vendor Advisory x_refsource_confirm
https://support.citrix.com/article/CTX219136

Scores

CVSS v3 7.5
EPSS 0.0009
EPSS Percentile 24.8%
Attack Vector LOCAL
CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Details

CWE
CWE-264
Status published
Products (4)
citrix/xenserver 6.0.2
citrix/xenserver 6.2.0 sp1
citrix/xenserver 6.5 sp1
citrix/xenserver 7.0
Published Feb 17, 2017
Tracked Since Feb 18, 2026