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FreeBSD: xen-kernel -- PV superpage functionality missing sanity checks (CVE-2016-1570)

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FreeBSD: xen-kernel -- PV superpage functionality missing sanity checks (CVE-2016-1570)

Severity
7
CVSS
(AV:L/AC:M/Au:N/C:C/I:C/A:C)
Published
01/22/2016
Created
07/25/2018
Added
02/29/2016
Modified
10/30/2017

Description

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.

Solution(s)

  • freebsd-upgrade-package-xen-kernel

References

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