CVE-2016-3159

LOW
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

The fpu_fxrstor function in arch/x86/i387.c in Xen 4.x does not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allows local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits. NOTE: this vulnerability exists because of an incorrect fix for CVE-2013-2076.

References

http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181699.html

http://lists.fedoraproject.org/pipermail/package-announce/2016-April/181729.html

http://support.citrix.com/article/CTX209443

http://www.debian.org/security/2016/dsa-3554

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

http://www.securityfocus.com/bid/85716

http://www.securitytracker.com/id/1035435

http://xenbits.xen.org/xsa/advisory-172.html

http://xenbits.xen.org/xsa/xsa172.patch

Details

Source: MITRE

Published: 2016-04-13

Updated: 2019-02-21

Type: CWE-200

Risk Information

CVSS v2

Base Score: 1.7

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

Impact Score: 2.9

Exploitability Score: 3.1

Severity: LOW

CVSS v3

Base Score: 3.8

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

Impact Score: 1.4

Exploitability Score: 2

Severity: LOW

Vulnerable Software

Configuration 1

OR

cpe:2.3:o:oracle:vm_server:3.3:*:*:*:*:*:*:*

cpe:2.3:o:oracle:vm_server:3.4:*:*:*:*:*:*:*

Configuration 2

OR

cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* versions from 4.3.0 to 4.3.4 (inclusive)

cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* versions from 4.4.0 to 4.4.4 (inclusive)

cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* versions from 4.5.0 to 4.5.3 (inclusive)

cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* versions from 4.6.0 to 4.6.1 (inclusive)

Configuration 3

OR

cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*

cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:*

Configuration 4

OR

cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

Tenable Plugins

View all (14 total)

IDNameProductFamilySeverity
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
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
93298SUSE SLES11 Security Update : xen (SUSE-SU-2016:2100-1) (Bunker Buster)NessusSuSE Local Security Checks
critical
93296SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2016:2093-1) (Bunker Buster)NessusSuSE Local Security Checks
critical
92635Debian DLA-571-1 : xen security update (Bunker Buster)NessusDebian Local Security Checks
high
92601OracleVM 3.3 : xen (OVMSA-2016-0089)NessusOracleVM Local Security Checks
high
92600OracleVM 3.4 : xen (OVMSA-2016-0088) (Bunker Buster)NessusOracleVM Local Security Checks
high
91756OracleVM 3.2 : xen (OVMSA-2016-0081)NessusOracleVM Local Security Checks
high
90638Debian DSA-3554-1 : xen - security updateNessusDebian Local Security Checks
high
90470Fedora 23 : xen-4.5.3-1.fc23 (2016-e5432ca977)NessusFedora Local Security Checks
low
90460Fedora 22 : xen-4.5.3-1.fc22 (2016-5f196e4e4a)NessusFedora Local Security Checks
low