CentOS Update for libvirt CESA-2013:0831 centos6

Published: 2013-05-17 04:23:55
CVE Author: NIST National Vulnerability Database

Affected Versions:
libvirt on CentOS 6

Please install the updated Linux Distribution Packages.

Technical Details:
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. It was found that libvirtd leaked file descriptors when listing all volumes for a particular pool. A remote attacker able to establish a read-only connection to libvirtd could use this flaw to cause libvirtd to consume all available file descriptors, preventing other users from using libvirtd services (such as starting a new guest) until libvirtd is restarted. (CVE-2013-1962) Red Hat would like to thank Edoardo Comar of IBM for reporting this issue. This update also fixes the following bugs: * Previously, libvirt made control group (cgroup) requests on files that it should not have. With older kernels, such nonsensical cgroup requests were ignored. However, newer kernels are stricter, resulting in libvirt logging spurious warnings and failures to the libvirtd and audit logs. The audit log failures displayed by the ausearch tool were similar to the following: root [date] - failed cgroup allow path rw /dev/kqemu With this update, libvirt no longer attempts the nonsensical cgroup actions, leaving only valid attempts in the libvirtd and audit logs (making it easier to search for real cases of failure). (BZ#958837) * Previously, libvirt used the wrong variable when constructing audit messages. This led to invalid audit messages, causing ausearch to format certain entries as having path=(null)' instead of the correct path. This could prevent ausearch from locating events related to cgroup device ACL modifications for guests managed by libvirt. With this update, the audit messages are generated correctly, preventing loss of audit coverage. (BZ#958839) All users of libvirt are advised to upgrade to these updated Linux Distribution Packages, which contain backported patches to correct these issues. After installing the updated Linux Distribution Packages, libvirtd will be restarted automatically.

CVSS Base Vector:

Detection Type:
Linux Distribution Package

Solution Type:
Vendor Patch

The remote host is missing an update for the 'libvirt' Linux Distribution Package(s) announced via the referenced advisory.

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)




CVSS Score
CentOS Local Security Checks

Free Vulnerability Scanning, Assessment and Management

Mageni's Platform is packed with all the features you need to scan, assess and manage vulnerabilities like this - it is free, open source, lightning fast, reliable and scalable.


Frequently Asked Questions

No, you can scan concurrently as many assets as you want. Please note that you must be aware of the hardware requeriments of the platform to ensure a good performance.

No, you can add as many assest as you want. It doesn't matters if you have millions of assets, we won't charge you for that.

No. The software is completely free. We have no intention to charge you to use the software, in fact - it completely goes against our beliefs and business model.

A vulnerability is defined in the ISO 27002 standard as “A weakness of an asset or group of assets that can be exploited by one or more threats” (International Organization for Standardization, 2005)

We generate revenue by providing support and other services for customers that require a subscription so they get guaranteed support and enterprise services. To use Mageni's Platform is completely free, with no limits at all.

Yes. Mageni understands that there are professionals and businesses that need commercial support so Mageni provides an active support subscription with everything needed to run Mageni's Platform reliably and securely. More than software, it's access to security experts, knowledge resources, security updates, and support tools you can't get anywhere else. The subscription includes:

  • Ongoing delivery
    • Patches
    • Bug fixes
    • Updates
    • Upgrades
  • Technical support
    • 24/7 availability
    • Unlimited Incidents
    • Specialty-based routing
    • Multi-Channel
  • Commitments
    • Software certifications
    • Software assurance
    • SLA

No, we don't store the information of your vulnerabilities in our servers.

Vulnerability management is the process in which vulnerabilities in IT are identified and the risks of these vulnerabilities are evaluated. This evaluation leads to correcting the vulnerabilities and removing the risk or a formal risk acceptance by the management of an organization. The term vulnerability management is often confused with vulnerability scanning. Despite the fact both are related, there is an important difference between the two. Vulnerability scanning consists of using a computer program to identify vulnerabilities in networks, computer infrastructure or applications. Vulnerability management is the process surrounding vulnerability scanning, also taking into account other aspects such as risk acceptance, remediation etc. Source: "Implementing a Vulnerability Management Process". SANS Institute.

I am ready to start scanning for vulnerabilities