FreeBSD : xen-kernel -- x86 PV guests may be able to mask interrupts (3ae078ca-c7eb-11e6-ae1b-002590263bf5)

This script is Copyright (C) 2016-2017 Tenable Network Security, Inc.

Synopsis :

The remote FreeBSD host is missing a security-related update.

Description :

The Xen Project reports :

Certain PV guest kernel operations (page table writes in particular)
need emulation, and use Xen's general x86 instruction emulator. This
allows a malicious guest kernel which asynchronously modifies its
instruction stream to effect the clearing of EFLAGS.IF from the state
used to return to guest context.

A malicious guest kernel administrator can cause a host hang or crash,
resulting in a Denial of Service.

See also :

Solution :

Update the affected package.

Risk factor :

Medium / CVSS Base Score : 4.9

Family: FreeBSD Local Security Checks

Nessus Plugin ID: 96058 ()

Bugtraq ID:

CVE ID: CVE-2016-10024

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