Improper input validation in Citrix Xenserver

CVE-2016-9385

The x86 segment base write emulation functionality in Xen 4.4.x through 4.7.x allows local x86 PV guest OS administrators to cause a denial of service (host crash) by leveraging lack of canonical address checks.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.004 (35.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.0 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H.

Affected products

  • Citrix Xenserver — versions 6.0.2, 6.2.0, 6.5
  • Xen — versions 4.4.0, 4.4.1, 4.4.2
  • N/a — versions n/a

Weakness classification (CWE)

References

  • cve@mitre.org (vendor-advisory, x_refsource_GENTOO)
  • cve@mitre.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
  • cve@mitre.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_SECTRACK)
  • cve@mitre.org (x_refsource_CONFIRM, Patch, VDB Entry, Third Party Advisory)
  • cve@mitre.org (x_refsource_CONFIRM, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2016-9385?
CVE-2016-9385 is a medium-severity vulnerability in Citrix Xenserver, classified under Improper Input Validation. CVSS score: 6.0/10. Published 2017-01-23.
How severe is CVE-2016-9385?
Medium severity. CVSS v3 base score is 6.0 out of 10.