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CentOS 6 : libvirt (CESA-2014:0103)
medium Nessus Plugin ID 72205
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Synopsis
The remote CentOS host is missing one or more security updates.Description
Updated libvirt packages that fix two security issues and one bug are now available for Red Hat Enterprise Linux 6.The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links 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 use-after-free flaw was found in the way several libvirt block APIs handled domain jobs. A remote attacker able to establish a read-only connection to libvirtd could use this flaw to crash libvirtd or, potentially, execute arbitrary code with the privileges of the libvirtd process (usually root). (CVE-2013-6458)
A race condition was found in the way libvirtd handled keepalive initialization requests when the connection was closed prior to establishing connection credentials. An attacker able to establish a read-only connection to libvirtd could use this flaw to crash libvirtd, resulting in a denial of service. (CVE-2014-1447)
This update also fixes the following bug :
* A race condition was possible between a thread starting a virtual machine with a guest agent configured (regular start-up or while migrating) and a thread that was killing the VM process (or the process crashing). The race could cause the monitor object to be freed by the thread that killed the VM process, which was later accessed by the thread that was attempting to start the VM, resulting in a crash.
This issue was fixed by checking the state of the VM after the attempted connection to the guest agent; if the VM in the meantime exited, no other operations are attempted. (BZ#1055578)
All libvirt users 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.See Also
Plugin Details
Severity: Medium
ID: 72205
File Name: centos_RHSA-2014-0103.nasl
Version: 1.11
Type: local
Agent: unix
Family: CentOS Local Security Checks
Published: 1/30/2014
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: 6.8
Temporal Score: 5
Vector: CVSS2#AV:A/AC:H/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2013-6458
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: 1/29/2014
Vulnerability Publication Date: 1/24/2014
Reference Information
CVE: CVE-2013-6458, CVE-2014-1447
RHSA: 2014:0103