Vulnerability Details : CVE-2016-6258
The PV pagetable code in arch/x86/mm.c in Xen 4.7.x and earlier allows local 32-bit PV guest OS administrators to gain host OS privileges by leveraging fast-paths for updating pagetable entries.
Vulnerability category: BypassGain privilege
Products affected by CVE-2016-6258
- cpe:2.3:a:citrix:xenserver:6.0:*:*:*:*:*:*:*
- cpe:2.3:a:citrix:xenserver:6.2.0:sp1:*:*:*:*:*:*
- cpe:2.3:a:citrix:xenserver:6.0.2:*:*:*:*:*:*:*
- cpe:2.3:a:citrix:xenserver:7.0:*:*:*:*:*:*:*
- cpe:2.3:a:citrix:xenserver:6.1:*:*:*:*:*:*:*
- cpe:2.3:a:citrix:xenserver:6.5.0:sp1:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:3.4.3:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:3.4.4:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:4.0.0:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:3.4.0:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:3.4.2:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:4.0.4:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:4.1.0:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:4.0.3:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:4.1.1:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:4.0.1:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:4.2.0:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:4.1.2:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:4.1.3:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:4.1.4:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:4.2.1:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:4.2.2:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:4.1.5:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:4.2.3:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:4.3.0:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:4.3.1:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:4.4.0:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:4.4.1:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:4.5.0:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:4.6.0:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:4.6.1:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:4.6.3:*:*:*:*:*:*:*
- cpe:2.3:o:xen:xen:4.7.0:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2016-6258
0.06%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 25 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2016-6258
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.2
|
HIGH | AV:L/AC:L/Au:N/C:C/I:C/A:C |
3.9
|
10.0
|
NIST | |
|
8.8
|
HIGH | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
2.0
|
6.0
|
NIST |
CWE ids for CVE-2016-6258
-
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.Assigned by: nvd@nist.gov (Primary)
References for CVE-2016-6258
-
http://xenbits.xen.org/xsa/xsa182-unstable.patch
Patch
-
http://xenbits.xen.org/xsa/xsa182-4.5.patch
Patch
-
https://security.gentoo.org/glsa/201611-09
Xen: Multiple vulnerabilities (GLSA 201611-09) — Gentoo security
-
http://www.securitytracker.com/id/1036446
Xen PV Pagetable Update Flaw Lets Local Users on an X86 PV Guest System Gain Elevated Privileges on the Host System - SecurityTrackerThird Party Advisory
-
http://www.securityfocus.com/bid/92131
Xen CVE-2016-6258 Privilege Escalation VulnerabilityThird Party Advisory
-
http://www.debian.org/security/2016/dsa-3633
Debian -- Security Information -- DSA-3633-1 xen
-
http://xenbits.xen.org/xsa/advisory-182.html
XSA-182 - Xen Security AdvisoriesMitigation;Patch;Vendor Advisory
-
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
Oracle VM Server for x86 Bulletin - July 2016Release Notes
-
http://support.citrix.com/article/CTX214954
Citrix XenServer Multiple Security UpdatesVendor Advisory
-
http://xenbits.xen.org/xsa/xsa182-4.6.patch
Patch
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