CVE-2016-6258 - Improper Access Control

Severity

72%

Complexity

39%

Confidentiality

165%

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.

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.

CVSS 3.0 Base Score 8.8. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H).

CVSS 2.0 Base Score 7.2. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (AV:L/AC:L/Au:N/C:C/I:C/A:C).

Overview

Type

Xen

First reported 8 years ago

2016-08-02 16:59:00

Last updated 7 years ago

2017-07-01 01:29:00

Affected Software

Xen 3.4.0

3.4.0

Xen 3.4.2

3.4.2

Xen 3.4.3

3.4.3

Xen 3.4.4

3.4.4

Xen 4.0.0

4.0.0

Xen 4.0.1

4.0.1

Xen 4.0.3

4.0.3

Xen 4.0.4

4.0.4

Xen 4.1.0

4.1.0

Xen 4.1.1

4.1.1

Xen 4.1.2

4.1.2

Xen 4.1.3

4.1.3

Xen 4.1.4

4.1.4

Xen 4.1.5

4.1.5

Xen 4.2.0

4.2.0

Xen 4.2.1

4.2.1

Xen 4.2.2

4.2.2

Xen 4.2.3

4.2.3

Xen Xen 4.3.0

4.3.0

Xen 4.3.1

4.3.1

Xen Xen 4.4.0

4.4.0

Xen Xen 4.4.1

4.4.1

Xen Xen 4.5.0

4.5.0

Xen Xen 4.6.0

4.6.0

Xen Xen 4.6.1

4.6.1

Xen 4.6.3

4.6.3

Xen 4.7.0

4.7.0

Citrix XenServer 6.0

6.0

Citrix XenServer 6.0.2

6.0.2

Citrix XenServer 6.2.0 Service Pack 1

6.2.0

Citrix XenServer 7.0

7.0

References

http://support.citrix.com/article/CTX214954

Vendor Advisory

DSA-3633

http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html

Release Notes

92131

Third Party Advisory

1036446

Third Party Advisory

http://xenbits.xen.org/xsa/advisory-182.html

Mitigation, Patch, Vendor Advisory

http://xenbits.xen.org/xsa/xsa182-4.5.patch

Patch

http://xenbits.xen.org/xsa/xsa182-4.6.patch

Patch

http://xenbits.xen.org/xsa/xsa182-unstable.patch

Patch

GLSA-201611-09

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