FreeBSD : qemu -- code execution on host machine (aea8d90e-b0c1-11e5-8d13-bc5ff45d0f28)

medium Nessus Plugin ID 87702

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Synopsis

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

Description

Petr Matousek of Red Hat Inc. reports :

Due converting PIO to the new memory read/write api we no longer provide separate I/O region lenghts for read and write operations. As a result, reading from PIT Mode/Command register will end with accessing pit->channels with invalid index and potentially cause memory corruption and/or minor information leak.

A privileged guest user in a guest with QEMU PIT emulation enabled could potentially (tough unlikely) use this flaw to execute arbitrary code on the host with the privileges of the hosting QEMU process.

Please note that by default QEMU/KVM guests use in-kernel (KVM) PIT emulation and are thus not vulnerable to this issue.

Solution

Update the affected packages.

Plugin Details

Severity: Medium

ID: 87702

File Name: freebsd_pkg_aea8d90eb0c111e58d13bc5ff45d0f28.nasl

Version: 2.6

Type: local

Family: FreeBSD Local Security Checks

Published: 1/4/2016

Updated: 1/4/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.8

CVSS v2

Risk Factor: Medium

Base Score: 6.9

Temporal Score: 5.4

Vector: CVSS2#AV:L/AC:M/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, cpe:/o:freebsd:freebsd

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/1/2016

Vulnerability Publication Date: 6/17/2015

Reference Information

CVE: CVE-2015-3214

Detections

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