CVE-2016-7094

MEDIUM
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

Buffer overflow in Xen 4.7.x and earlier allows local x86 HVM guest OS administrators on guests running with shadow paging to cause a denial of service via a pagetable update.

References

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

http://www.debian.org/security/2016/dsa-3663

http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html

http://www.securityfocus.com/bid/92864

http://www.securitytracker.com/id/1036753

http://xenbits.xen.org/xsa/advisory-187.html

http://xenbits.xen.org/xsa/xsa187-0001-x86-shadow-Avoid-overflowing-sh_ctxt-seg_reg.patch

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

Details

Source: MITRE

Published: 2016-09-21

Updated: 2017-07-01

Type: CWE-119

Risk Information

CVSS v2

Base Score: 1.5

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

Impact Score: 2.9

Exploitability Score: 2.7

Severity: LOW

CVSS v3

Base Score: 4.1

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

Impact Score: 3.6

Exploitability Score: 0.5

Severity: MEDIUM

Vulnerable Software

Configuration 1

OR

cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* versions up to 4.7.0 (inclusive)

Tenable Plugins

View all (19 total)

IDNameProductFamilySeverity
95502FreeBSD : xen-kernel -- x86 HVM: Overflow of sh_ctxt->seg_reg[] (4aae54be-ba4d-11e6-ae1b-002590263bf5)NessusFreeBSD Local Security Checks
medium
94893GLSA-201611-09 : Xen: Multiple vulnerabilities (Bunker Buster)NessusGentoo Local Security Checks
high
94780Fedora 25 : xen (2016-1d8429b89f)NessusFedora Local Security Checks
high
94608SUSE SLES11 Security Update : xen (SUSE-SU-2016:2725-1) (Bunker Buster)NessusSuSE Local Security Checks
critical
94269SUSE SLES12 Security Update : xen (SUSE-SU-2016:2533-1) (Bunker Buster)NessusSuSE Local Security Checks
critical
94267SUSE SLES11 Security Update : xen (SUSE-SU-2016:2528-1) (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
93418Debian DSA-3663-1 : xen - security updateNessusDebian Local Security Checks
high
93413Debian DLA-614-1 : xen security updateNessusDebian Local Security Checks
high
93397OracleVM 3.2 : xen (OVMSA-2016-0104)NessusOracleVM Local Security Checks
high
93396OracleVM 3.3 : xen (OVMSA-2016-0103)NessusOracleVM Local Security Checks
high
93395OracleVM 3.4 : xen (OVMSA-2016-0102)NessusOracleVM Local Security Checks
high