Fedora 12 : libvirt-0.8.2-1.fc12 (2010-11021)

medium Nessus Plugin ID 47839

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Synopsis

The remote Fedora host is missing a security update.

Description

A reboot is required to update the iptables rules for the default virtual network to address the CVE-2010-2242 All disk format probing is now disabled in a default installation of libvirt. This change may prevent KVM guests using qcow2 disks from booting successfully. If this occurs verify that the guest XML <disk> element has explicitly requested use of the qcow2 data format via the <driver> element:
<driver name='qemu' type='qcow2'/> If the qcow2 is using an external backing file, it may be necessary to re-create the qcow2 file, explicitly specifying the backing store format with the '-o' option.
qemu- img create -f qcow2 -b master.qcow2 -o backing_fmt=qcow2 newdisk.qcow2 If this is not possible, disk format probing can be re-enabled via /etc/libvirt/qemu.conf allow_disk_format_probing = 1 NB, enabling disk format probing has security consequences as per the linked CVEs.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected libvirt package.

Plugin Details

Severity: Medium

ID: 47839

File Name: fedora_2010-11021.nasl

Version: 1.11

Type: local

Agent: unix

Family: Fedora Local Security Checks

Published: 7/27/2010

Updated: 1/11/2021

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.7

CVSS v2

Risk Factor: Medium

Base Score: 4.4

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

Vulnerability Information

CPE: cpe:/o:fedoraproject:fedora:12, p-cpe:/a:fedoraproject:fedora:libvirt

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Patch Publication Date: 7/13/2010

Reference Information

CVE: CVE-2010-2237, CVE-2010-2238, CVE-2010-2239, CVE-2010-2242

FEDORA: 2010-11021

Detections

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