CVE-2016-1570
Published: 22 January 2016
The PV superpage functionality in arch/x86/mm.c in Xen 3.4.0, 3.4.1, and 4.1.x through 4.6.x allows local PV guests to obtain sensitive information, cause a denial of service, gain privileges, or have unspecified other impact via a crafted page identifier (MFN) to the (1) MMUEXT_MARK_SUPER or (2) MMUEXT_UNMARK_SUPER sub-op in the HYPERVISOR_mmuext_op hypercall or (3) unknown vectors related to page table updates.
Notes
| Author | Note |
|---|---|
| mdeslaur | hypervisor packages are in universe. For issues in the hypervisor, add appropriate tags to each section, ex: Tags_xen: universe-binary |
| tyhicks | Feature disabled by default "Xen versions 3.4.0, 3.4.1, and from 4.1 onwards are affected." |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
xen Launchpad, Ubuntu, Debian |
precise |
Released
(4.1.6.1-0ubuntu0.12.04.10)
|
| trusty |
Released
(4.4.2-0ubuntu0.14.04.5)
|
|
| upstream |
Needed
|
|
| vivid |
Ignored
(end of life)
|
|
| wily |
Released
(4.5.1-0ubuntu1.3)
|
|
| Binaries built from this source package are in Universe and so are supported by the community. | ||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 8.5 |
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | Low |
| User interaction | None |
| Scope | Changed |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H |