The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2013:1272 advisory.

    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.

    libvirt invokes the PolicyKit pkcheck utility to handle authorization. A     race condition was found in the way libvirt used this utility, allowing a     local user to bypass intended PolicyKit authorizations or execute arbitrary     commands with root privileges. (CVE-2013-4311)

    Note: With this update, libvirt has been rebuilt to communicate with     PolicyKit via a different API that is not vulnerable to the race condition.
    The polkit RHSA-2013:1270 advisory must also be installed to fix the     CVE-2013-4311 issue.

    An invalid free flaw was found in libvirtd's     remoteDispatchDomainMemoryStats function. An attacker able to establish a     read-only connection to libvirtd could use this flaw to crash libvirtd.
    (CVE-2013-4296)

    The CVE-2013-4296 issue was discovered by Daniel P. Berrange of Red Hat.

    This update also fixes the following bugs:

    * Prior to this update, the libvirtd daemon leaked memory in the     virCgroupMoveTask() function. A fix has been provided which prevents     libvirtd from incorrect management of memory allocations. (BZ#984556)

    * Previously, the libvirtd daemon was accessing one byte before the array     in the virCgroupGetValueStr() function. This bug has been fixed and     libvirtd now stays within the array bounds. (BZ#984561)

    * When migrating, libvirtd leaked the migration URI (Uniform Resource     Identifier) on destination. A patch has been provided to fix this bug and     the migration URI is now freed correctly. (BZ#984578)

    * Updating a network interface using virDomainUpdateDeviceFlags API failed     when a boot order was set for that interface. The update failed even if the     boot order was set in the provided device XML. The     virDomainUpdateDeviceFlags API has been fixed to correctly parse the boot     order specification from the provided device XML and updating network     interfaces with boot orders now works as expected. (BZ#1003934)

    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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

Analytics

RHEL 6 : libvirt (RHSA-2013:1272)

high Nessus Plugin ID 70011

Version 1.17