Home/CVE/The x86 emulator in Xen does not properly treat x86 NULL segments as unusable when accessing memory, which might allow l
CVE

CVE-2016-9386

The x86 emulator in Xen does not properly treat x86 NULL segments as unusable when accessing memory, which might allow l

The 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.

HIGH · CVSS 7.8 EPSS 0.001
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
▤

Affected Products & Versions

2
citrix xenserverall versions
xenall versions
▣

Scoring & Timeline

7.8
HIGH · CVSS v3.0 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD23 Jan 2017 · 09:59 PM
CVSS VectorCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

7
suse-csafopenSUSE-SU-2024:11520-1
suse-csafSUSE-SU-2016:3273-1
suse-csafSUSE-SU-2016:3174-1
suse-csafSUSE-SU-2016:3156-1
suse-csafSUSE-SU-2016:3083-1
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.securityfocus.com/bid/94471Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1037340Third Party AdvisoryVDB Entry
http://xenbits.xen.org/xsa/advisory-191.htmlPatchVendor Advisory
https://security.gentoo.org/glsa/201612-56
https://support.citrix.com/article/CTX218775PatchThird Party Advisory
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