Improper Access Control Affecting xen package, versions <4.6.0-1ubuntu2
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-UBUNTU1604-XEN-365829
- published14 Apr 2016
- disclosed14 Apr 2016
Introduced: 14 Apr 2016
CVE-2015-8550 (opens in a new tab)How to fix?
Upgrade Ubuntu:16.04 xen to version 4.6.0-1ubuntu2 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:16.04 relevant fixed versions and status.
Xen, when used on a system providing PV backends, allows local guest OS administrators to cause a denial of service (host OS crash) or gain privileges by writing to memory shared between the frontend and backend, aka a double fetch vulnerability.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2015-8550
- http://www.debian.org/security/2016/dsa-3434
- http://www.debian.org/security/2016/dsa-3471
- http://www.debian.org/security/2016/dsa-3519
- https://security-tracker.debian.org/tracker/CVE-2015-8550
- https://security.gentoo.org/glsa/201604-03
- http://xenbits.xen.org/xsa/advisory-155.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html
- http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00005.html
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- http://www.securityfocus.com/bid/79592
- http://www.securitytracker.com/id/1034479