Information disclosure in Citrix Xenserver
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 used to manage guest extended register state, which allows local guest domains to obtain sensitive information from other domains via unspecified vectors.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.023 (82.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 82.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000
Affected products
- Citrix Xenserver — versions 6.0
- Xen — versions 4.3.0, 4.3.1, 4.3.2
Weakness classification (CWE)
References
- www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- www.debian.org/security/2016/dsa-3519 (vendor-advisory)
- www.securitytracker.com/id/1034477 (vdb-entry)
- www.securityfocus.com/bid/79543 (vdb-entry)
- xenbits.xen.org/xsa/advisory-165.html (Patch, Vendor Advisory)
- security.gentoo.org/glsa/201604-03 (vendor-advisory)
- support.citrix.com/article/CTX203879
Frequently asked questions
- What is CVE-2015-8555?
- CVE-2015-8555 is a high-severity vulnerability in Citrix Xenserver, classified under Information Disclosure. CVSS score: 8.6/10. Published 2016-04-13.
- How severe is CVE-2015-8555?
- High severity. CVSS v3 base score is 8.6 out of 10.