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

high Nessus Plugin ID 85485
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Synopsis

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

Description

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.

Solution

Update the affected packages.

See Also

http://xenbits.xen.org/xsa/advisory-139.html

http://www.nessus.org/u?6741fea1

http://www.nessus.org/u?4e731674

Plugin Details

Severity: High

ID: 85485

File Name: freebsd_pkg_ee99899d434711e593ad002590263bf5.nasl

Version: 2.7

Type: local

Published: 8/18/2015

Updated: 1/6/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 6

CVSS v2

Risk Factor: High

Base Score: 7.2

Vector: 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: 8/17/2015

Vulnerability Publication Date: 8/3/2015

Reference Information

CVE: CVE-2015-5166