Access Restriction Bypass Affecting xen package, versions <4.4.0-1
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-DEBIAN11-XEN-517860
- published17 Feb 2017
- disclosed17 Feb 2017
Introduced: 17 Feb 2017
CVE-2016-9637 (opens in a new tab)How to fix?
Upgrade Debian:11 xen to version 4.4.0-1 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 Debian.
See How to fix? for Debian:11 relevant fixed versions and status.
The (1) ioport_read and (2) ioport_write functions in Xen, when qemu is used as a device model within Xen, might allow local x86 HVM guest OS administrators to gain qemu process privileges via vectors involving an out-of-range ioport access.
References
- https://security-tracker.debian.org/tracker/CVE-2016-9637
- https://lists.debian.org/debian-lts-announce/2018/02/msg00005.html
- https://security.gentoo.org/glsa/201612-56
- https://support.citrix.com/article/CTX219136
- http://xenbits.xen.org/xsa/advisory-199.html
- http://rhn.redhat.com/errata/RHSA-2016-2963.html
- http://www.securityfocus.com/bid/94699
- http://www.securitytracker.com/id/1037397
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2016-9637