CVE-2016-9386

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Summary

CVECVE-2016-9386
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2017-01-23 21:59:02 UTC
Updated2025-04-20 01:37:25 UTC
DescriptionThe x86 emulator in Xen does not properly treat x86 NULL segments as unusable when accessing memory, which might allow local HVM guest users to gain privileges via vectors involving "unexpected" base/limit values.

Risk And Classification

Primary CVSS: v3.0 7.8 HIGH from [email protected]

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem Types: CWE-264 | n/a

VersionSourceTypeScoreSeverityVector
3.0[email protected]Primary7.8HIGHCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
2.0[email protected]Primary4.6AV:L/AC:L/Au:N/C:P/I:P/A:P

CVSS v3.0 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0 Breakdown

Access Vector
Local
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial

AV:L/AC:L/Au:N/C:P/I:P/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Citrix Xenserver 6.0.2 All All All
Application Citrix Xenserver 6.2.0 All All All
Application Citrix Xenserver 6.5 All All All
Application Citrix Xenserver 7.0 All All All
Operating System Xen Xen All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
Xen: Multiple vulnerabilities (GLSA 201612-56) — Gentoo security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org
Xen x86 Null Segment Access Control Bug Lets Local Users on a Guest System Gain Elevated Privileges on the Guest System - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com Third Party Advisory, VDB Entry
Citrix XenServer Multiple Security Updates af854a3a-2127-422b-91ae-364da2661108 support.citrix.com Patch, Third Party Advisory
XSA-191 - Xen Security Advisories af854a3a-2127-422b-91ae-364da2661108 xenbits.xen.org Patch, Vendor Advisory
Xen CVE-2016-9386 Privilege Escalation Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com Third Party Advisory, VDB Entry
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 500810 Alpine Linux Security Update for xen
  • 504553 Alpine Linux Security Update for xen

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