CentOS 6 : libvirt (CESA-2012:1359)

medium Nessus Plugin ID 62520

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Synopsis

The remote CentOS host is missing one or more security updates.

Description

Updated libvirt packages that fix one security issue and multiple bugs are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

The libvirt library is a C API for managing and interacting with the virtualization capabilities of Linux and other operating systems. In addition, libvirt provides tools for remote management of virtualized systems.

A flaw was found in libvirtd's RPC call handling. An attacker able to establish a read-only connection to libvirtd could use this flaw to crash libvirtd by sending an RPC message that has an event as the RPC number, or an RPC number that falls into a gap in the RPC dispatch table. (CVE-2012-4423)

This issue was discovered by Wenlong Huang of the Red Hat Virtualization QE Team.

This update also fixes the following bugs :

* When the host_uuid option was present in the libvirtd.conf file, the augeas libvirt lens was unable to parse the file. This bug has been fixed and the augeas libvirt lens now parses libvirtd.conf as expected in the described scenario. (BZ#858988)

* Disk hot plug is a two-part action: the qemuMonitorAddDrive() call is followed by the qemuMonitorAddDevice() call. When the first part succeeded but the second one failed, libvirt failed to roll back the first part and the device remained in use even though the disk hot plug failed. With this update, the rollback for the drive addition is properly performed in the described scenario and disk hot plug now works as expected. (BZ#859376)

* When a virtual machine was started with an image chain using block devices and a block rebase operation was issued, the operation failed on completion in the blockJobAbort() function. This update relabels and configures cgroups for the backing files and the rebase operation now succeeds. (BZ#860720)

All users of libvirt are advised to upgrade to these updated packages, which contain backported patches to correct these issues. After installing the updated packages, libvirtd will be restarted automatically.

Solution

Update the affected libvirt packages.

Plugin Details

Severity: Medium

ID: 62520

File Name: centos_RHSA-2012-1359.nasl

Version: 1.11

Type: local

Agent: unix

Family: CentOS Local Security Checks

Published: 10/15/2012

Updated: 1/4/2021

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2012-4423

Vulnerability Information

CPE: p-cpe:/a:centos:centos:libvirt-client, p-cpe:/a:centos:centos:libvirt-python, cpe:/o:centos:centos:6, p-cpe:/a:centos:centos:libvirt, p-cpe:/a:centos:centos:libvirt-devel, p-cpe:/a:centos:centos:libvirt-lock-sanlock

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

Exploit Ease: No known exploits are available

Patch Publication Date: 10/11/2012

Vulnerability Publication Date: 11/19/2012

Reference Information

CVE: CVE-2012-4423

BID: 55541

RHSA: 2012:1359

Detections

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