Improper Access Control Affecting xen package, versions <4.6.0-1ubuntu4.2
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-366986
- published2 Aug 2016
- disclosed2 Aug 2016
Introduced: 2 Aug 2016
CVE-2016-6258 (opens in a new tab)How to fix?
Upgrade Ubuntu:16.04 xen to version 4.6.0-1ubuntu4.2 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.
The PV pagetable code in arch/x86/mm.c in Xen 4.7.x and earlier allows local 32-bit PV guest OS administrators to gain host OS privileges by leveraging fast-paths for updating pagetable entries.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2016-6258
- http://www.debian.org/security/2016/dsa-3633
- https://security-tracker.debian.org/tracker/CVE-2016-6258
- https://security.gentoo.org/glsa/201611-09
- http://support.citrix.com/article/CTX214954
- http://xenbits.xen.org/xsa/advisory-182.html
- http://xenbits.xen.org/xsa/xsa182-4.5.patch
- http://xenbits.xen.org/xsa/xsa182-4.6.patch
- http://xenbits.xen.org/xsa/xsa182-unstable.patch
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- http://www.securityfocus.com/bid/92131
- http://www.securitytracker.com/id/1036446