FreeBSD : qemu, xen-tools -- use-after-free in QEMU/Xen block unplug protocol (ee99899d-4347-11e5-93ad-002590263bf5)

High Nessus Plugin ID 85485


The remote FreeBSD host is missing one or more security-related updates.


The Xen Project reports :

When unplugging an emulated block device the device was not fully unplugged, meaning a second unplug attempt would attempt to unplug the device a second time using a previously freed pointer.

An HVM guest which has access to an emulated IDE disk device may be able to exploit this vulnerability in order to take over the qemu process elevating its privilege to that of the qemu process.


Update the affected packages.

See Also

Plugin Details

Severity: High

ID: 85485

File Name: freebsd_pkg_ee99899d434711e593ad002590263bf5.nasl

Version: $Revision: 2.3 $

Type: local

Published: 2015/08/18

Modified: 2015/09/18

Dependencies: 12634

Risk Information

Risk Factor: High


Base Score: 7.2

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:qemu, p-cpe:/a:freebsd:freebsd:qemu-devel, p-cpe:/a:freebsd:freebsd:qemu-sbruno, p-cpe:/a:freebsd:freebsd:qemu-user-static, p-cpe:/a:freebsd:freebsd:xen-tools, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Patch Publication Date: 2015/08/17

Vulnerability Publication Date: 2015/08/03

Reference Information

CVE: CVE-2015-5166