Vulnerability in Citrix Xenserver
CVE-2016-9637
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (27.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 27.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Citrix Xenserver — versions 6.0.2, 6.2.0, 6.5
Weakness classification (CWE)
References
- www.securityfocus.com/bid/94699 (vdb-entry)
- security.gentoo.org/glsa/201612-56 (vendor-advisory)
- support.citrix.com/article/CTX219136
- lists.debian.org/debian-lts-announce/2018/02/msg00005.html (mailing-list)
- xenbits.xen.org/xsa/advisory-199.html
- www.securitytracker.com/id/1037397 (vdb-entry)
- rhn.redhat.com/errata/RHSA-2016-2963.html (vendor-advisory)
Frequently asked questions
- What is CVE-2016-9637?
- CVE-2016-9637 is a high-severity vulnerability in Citrix Xenserver, classified under CWE-264. CVSS score: 7.5/10. Published 2017-02-17.
- How severe is CVE-2016-9637?
- High severity. CVSS v3 base score is 7.5 out of 10.