CVE-2016-4480

Severity

72%

Complexity

39%

Confidentiality

165%

The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen 4.6.x and earlier does not properly handle the Page Size (PS) page table entry bit at the L4 and L3 page table levels, which might allow local guest OS users to gain privileges via a crafted mapping of memory.

The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen 4.6.x and earlier does not properly handle the Page Size (PS) page table entry bit at the L4 and L3 page table levels, which might allow local guest OS users to gain privileges via a crafted mapping of memory.

CVSS 3.0 Base Score 8.4. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/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

First reported 8 years ago

2016-05-18 14:59:00

Last updated 8 years ago

2016-12-01 03:10:00

Affected Software

Xen

References

DSA-3633

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

Vendor Advisory

90710

1035901

http://xenbits.xen.org/xsa/advisory-176.html

Vendor Advisory

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