CVE-2016-9382

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 4.0.x through 4.7.x mishandle x86 task switches to VM86 mode, which allows local 32-bit x86 HVM guest OS users to gain privileges or cause a denial of service (guest OS crash) by leveraging a guest operating system that uses hardware task switching and allows a new task to start in VM86 mode.

References

http://www.securityfocus.com/bid/94470

http://www.securitytracker.com/id/1037341

http://xenbits.xen.org/xsa/advisory-192.html

https://security.gentoo.org/glsa/201612-56

https://support.citrix.com/article/CTX218775

Details

Source: MITRE

Published: 2017-01-23

Updated: 2017-07-01

Type: CWE-264

Risk Information

CVSS v2

Base Score: 4.6

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

Impact Score: 6.4

Exploitability Score: 3.9

Severity: MEDIUM

CVSS v3

Base Score: 7.8

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

Impact Score: 5.9

Exploitability Score: 1.8

Severity: HIGH

Vulnerable Software

Configuration 1

OR

cpe:2.3:o:xen:xen:4.0.0:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.0.1:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.0.2:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.0.3:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.0.4:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.1.0:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.1.1:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.1.2:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.1.3:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.1.4:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.1.5:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.1.6.1:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.2.0:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.2.1:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.2.2:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.2.3:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.2.4:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.2.5:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.3.0:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.3.1:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.3.2:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.3.3:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.3.4:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.4.0:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.4.1:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.4.2:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.4.3:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.4.4:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.5.0:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.5.1:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.5.2:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.5.3:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.5.5:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.6.0:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.6.1:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.6.3:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.6.4:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.7.0:*:*:*:*:*:*:*

cpe:2.3:o:xen:xen:4.7.1:*:*:*:*:*:*:*

Configuration 2

OR

cpe:2.3:a:citrix:xenserver:6.0.2:*:*:*:*:*:*:*

cpe:2.3:a:citrix:xenserver:6.2.0:*:*:*:*:*:*:*

cpe:2.3:a:citrix:xenserver:6.5:*:*:*:*:*:*:*

cpe:2.3:a:citrix:xenserver:7.0:*:*:*:*:*:*:*

Tenable Plugins

View all (22 total)

IDNameProductFamilySeverity
103830OracleVM 3.4 : xen (OVMSA-2017-0153)NessusOracleVM Local Security Checks
critical
96253openSUSE Security Update : xen (openSUSE-2017-5)NessusSuSE Local Security Checks
high
96252openSUSE Security Update : xen (openSUSE-2017-4)NessusSuSE Local Security Checks
high
96231GLSA-201612-56 : Xen: Multiple vulnerabilitiesNessusGentoo Local Security Checks
high
96150SUSE SLES11 Security Update : xen (SUSE-SU-2016:3273-1)NessusSuSE Local Security Checks
high
96032SUSE SLES11 Security Update : xen (SUSE-SU-2016:3174-1)NessusSuSE Local Security Checks
high
95910openSUSE Security Update : xen (openSUSE-2016-1477)NessusSuSE Local Security Checks
high
95822SUSE SLES12 Security Update : xen (SUSE-SU-2016:3156-1)NessusSuSE Local Security Checks
high
95761SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2016:3083-1)NessusSuSE Local Security Checks
high
95709SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2016:3067-1)NessusSuSE Local Security Checks
high
95630Xen Multiple Vulnerabilities (XSA-191 - XSA-198)NessusMisc.
high
95624SUSE SLES11 Security Update : xen (SUSE-SU-2016:3044-1)NessusSuSE Local Security Checks
high
95610Debian DSA-3729-1 : xen - security updateNessusDebian Local Security Checks
high
95539Citrix XenServer Multiple Vulnerabilities (CTX218775)NessusMisc.
high
95506FreeBSD : xen-kernel -- x86 task switch to VM86 mode mis-handled (523bb0b7-ba4d-11e6-ae1b-002590263bf5)NessusFreeBSD Local Security Checks
high
95493Fedora 25 : xen (2016-999e1a6927)NessusFedora Local Security Checks
high
95492Fedora 24 : xen (2016-95c104a4c6)NessusFedora Local Security Checks
high
95491Fedora 23 : xen (2016-68b71978a1)NessusFedora Local Security Checks
high
95296Debian DLA-720-1 : xen security updateNessusDebian Local Security Checks
high
95280OracleVM 3.2 : xen (OVMSA-2016-0166)NessusOracleVM Local Security Checks
high
95279OracleVM 3.3 : xen (OVMSA-2016-0165)NessusOracleVM Local Security Checks
high
95278OracleVM 3.4 : xen (OVMSA-2016-0164)NessusOracleVM Local Security Checks
high