CVE-2015-8555

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 4.6.x, 4.5.x, 4.4.x, 4.3.x, and earlier do not initialize x86 FPU stack and XMM registers when XSAVE/XRSTOR are not used to manage guest extended register state, which allows local guest domains to obtain sensitive information from other domains via unspecified vectors.

References

http://support.citrix.com/article/CTX203879

http://www.debian.org/security/2016/dsa-3519

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

http://www.securityfocus.com/bid/79543

http://www.securitytracker.com/id/1034477

http://xenbits.xen.org/xsa/advisory-165.html

https://security.gentoo.org/glsa/201604-03

Details

Source: MITRE

Published: 2016-04-13

Updated: 2017-07-01

Type: CWE-200

Risk Information

CVSS v2

Base Score: 5

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

Impact Score: 2.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3

Base Score: 8.6

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

Impact Score: 4

Exploitability Score: 3.9

Severity: HIGH

Vulnerable Software

Configuration 1

OR

cpe:2.3:a:citrix:xenserver:6.0:*:*:*:*:*:*:*

Configuration 2

OR

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:4.6.0:*:*:*:*:*:*:*

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

Tenable Plugins

View all (17 total)

IDNameProductFamilySeverity
93177SUSE SLES11 Security Update : xen (SUSE-SU-2016:1745-1)NessusSuSE Local Security Checks
critical
91756OracleVM 3.2 : xen (OVMSA-2016-0081)NessusOracleVM Local Security Checks
high
91249SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2016:1318-1)NessusSuSE Local Security Checks
critical
91198Debian DLA-479-1 : xen security updateNessusDebian Local Security Checks
high
90759SUSE SLES11 Security Update : xen (SUSE-SU-2016:1154-1)NessusSuSE Local Security Checks
critical
90396SUSE SLED11 / SLES11 Security Update : xen (SUSE-SU-2016:0955-1)NessusSuSE Local Security Checks
critical
90380GLSA-201604-03 : Xen: Multiple vulnerabilities (Venom)NessusGentoo Local Security Checks
critical
90186SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2016:0873-1)NessusSuSE Local Security Checks
critical
90030Debian DSA-3519-1 : xen - security updateNessusDebian Local Security Checks
high
89723SUSE SLES10 Security Update : Xen (SUSE-SU-2016:0658-1)NessusSuSE Local Security Checks
critical
89429Fedora 23 : xen-4.5.2-6.fc23 (2015-d8253e2b1d)NessusFedora Local Security Checks
high
89398Fedora 22 : xen-4.5.2-6.fc22 (2015-c44bd3e0fa)NessusFedora Local Security Checks
high
88170OracleVM 3.3 : xen (OVMSA-2016-0007)NessusOracleVM Local Security Checks
high
88126openSUSE Security Update : xen (openSUSE-2016-36)NessusSuSE Local Security Checks
high
88125openSUSE Security Update : xen (openSUSE-2016-35)NessusSuSE Local Security Checks
high
88124openSUSE Security Update : xen (openSUSE-2016-34)NessusSuSE Local Security Checks
high
87752FreeBSD : xen-kernel -- information leak in legacy x86 FPU/XMM initialization (e839ca04-b40d-11e5-9728-002590263bf5)NessusFreeBSD Local Security Checks
high