CVE-2016-7093

HIGH
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

Xen 4.5.3, 4.6.3, and 4.7.x allow local HVM guest OS administrators to overwrite hypervisor memory and consequently gain host OS privileges by leveraging mishandling of instruction pointer truncation during emulation.

References

http://support.citrix.com/article/CTX216071

http://www.securityfocus.com/bid/92865

http://www.securitytracker.com/id/1036752

http://xenbits.xen.org/xsa/advisory-186.html

http://xenbits.xen.org/xsa/xsa186-0001-x86-emulate-Correct-boundary-interactions-of-emulate.patch

https://security.gentoo.org/glsa/201611-09

Details

Source: MITRE

Published: 2016-09-21

Updated: 2017-07-01

Type: CWE-264

Risk Information

CVSS v2

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

CVSS v3

Base Score: 8.2

Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Impact Score: 6

Exploitability Score: 1.5

Severity: HIGH

Tenable Plugins

View all (12 total)

IDNameProductFamilySeverity
95501FreeBSD : xen-kernel -- x86: Mishandling of instruction pointer truncation during emulation (49211361-ba4d-11e6-ae1b-002590263bf5)NessusFreeBSD Local Security Checks
high
94893GLSA-201611-09 : Xen: Multiple vulnerabilities (Bunker Buster)NessusGentoo Local Security Checks
high
94780Fedora 25 : xen (2016-1d8429b89f)NessusFedora Local Security Checks
high
94269SUSE SLES12 Security Update : xen (SUSE-SU-2016:2533-1) (Bunker Buster)NessusSuSE Local Security Checks
critical
94038SUSE SLES11 Security Update : xen (SUSE-SU-2016:2507-1) (Bunker Buster)NessusSuSE Local Security Checks
high
94000openSUSE Security Update : xen (openSUSE-2016-1170) (Bunker Buster)NessusSuSE Local Security Checks
critical
93999openSUSE Security Update : xen (openSUSE-2016-1169) (Bunker Buster)NessusSuSE Local Security Checks
critical
93935SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2016:2473-1) (Bunker Buster)NessusSuSE Local Security Checks
high
93802Xen Multiple Vulnerabilities (XSA-186, XSA-187)NessusMisc.
high
93623Fedora 23 : xen (2016-1c3374bcb9)NessusFedora Local Security Checks
high
93608Citrix XenServer Multiple Vulnerabilities (CTX216071)NessusMisc.
medium
93491Fedora 24 : xen (2016-7d2c67d1f5)NessusFedora Local Security Checks
high