Home/CVE/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
CVE

CVE-2015-8555

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

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.

HIGH · CVSS 8.6 EPSS 0.00551
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
▤

Affected Products & Versions

2
citrix xenserverall versions
xenall versions
▣

Scoring & Timeline

8.6
HIGH · CVSS v3.0 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD13 Apr 2016 · 03:59 PM
CVSS VectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
⚑

Vendor Advisories

6
suse-csafopenSUSE-SU-2024:10196-1
suse-csafSUSE-SU-2016:1745-1
suse-csafSUSE-SU-2016:1318-1
suse-csafSUSE-SU-2016:1154-1
suse-csafSUSE-SU-2016:0955-1
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
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.htmlPatchVendor Advisory
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