Information Exposure Affecting xen package, versions <4.5.0-1ubuntu4.4
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1504-XEN-366002
- published13 Apr 2016
- disclosed13 Apr 2016
Introduced: 13 Apr 2016
CVE-2015-8555 (opens in a new tab)How to fix?
Upgrade Ubuntu:15.04 xen to version 4.5.0-1ubuntu4.4 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream xen package and not the xen package as distributed by Ubuntu.
See How to fix? for Ubuntu:15.04 relevant fixed versions and status.
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://people.ubuntu.com/~ubuntu-security/cve/CVE-2015-8555
- http://www.debian.org/security/2016/dsa-3519
- https://security-tracker.debian.org/tracker/CVE-2015-8555
- https://security.gentoo.org/glsa/201604-03
- http://support.citrix.com/article/CTX203879
- http://xenbits.xen.org/xsa/advisory-165.html
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- http://www.securityfocus.com/bid/79543
- http://www.securitytracker.com/id/1034477