CVE-2015-8555
high
CVSS v3
8.6
CVSS v2
5.0
VIR risk
8.6
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.
Predictions
Exploit likelihood
91%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2015-8555
Vendor advisory: cve@mitre.org — http://xenbits.xen.org/xsa/advisory-165.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 4.8.0~rc3-1 |
| debian | bullseye | fixed | 4.8.0~rc3-1 |
| debian | forky | fixed | 4.8.0~rc3-1 |
| debian | sid | fixed | 4.8.0~rc3-1 |
| debian | trixie | fixed | 4.8.0~rc3-1 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| citrix | xenserver | 6.0 | |
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
- https://security-tracker.debian.org/tracker/CVE-2015-8555
CWEs
CWE-200
Verify integrity in audit chain (admin only). AS-IS.