low
2.1
CWE
264 476
Advisory Published
Updated

CVE-2013-6436: Null Pointer Dereference

First published: Tue Jan 07 2014(Updated: )

The lxcDomainGetMemoryParameters method in lxc/lxc_driver.c in libvirt 1.0.5 through 1.2.0 does not properly check the status of LXC guests when reading memory tunables, which allows local users to cause a denial of service (NULL pointer dereference and libvirtd crash) via a guest in the shutdown status, as demonstrated by the "virsh memtune" command.

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
Red Hat Libvirt-daemon-driver-storage-iscsi-direct=1.0.5
Red Hat Libvirt-daemon-driver-storage-iscsi-direct=1.0.5.1
Red Hat Libvirt-daemon-driver-storage-iscsi-direct=1.0.5.2
Red Hat Libvirt-daemon-driver-storage-iscsi-direct=1.0.5.3
Red Hat Libvirt-daemon-driver-storage-iscsi-direct=1.0.5.4
Red Hat Libvirt-daemon-driver-storage-iscsi-direct=1.0.5.5
Red Hat Libvirt-daemon-driver-storage-iscsi-direct=1.0.5.6
Red Hat Libvirt-daemon-driver-storage-iscsi-direct=1.0.6
Red Hat Libvirt-daemon-driver-storage-iscsi-direct=1.1.0
Red Hat Libvirt-daemon-driver-storage-iscsi-direct=1.1.1
Red Hat Libvirt-daemon-driver-storage-iscsi-direct=1.1.2
Red Hat Libvirt-daemon-driver-storage-iscsi-direct=1.1.3
Red Hat Libvirt-daemon-driver-storage-iscsi-direct=1.1.4
Red Hat Libvirt-daemon-driver-storage-iscsi-direct=1.2.0

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2013-6436?

    CVE-2013-6436 has a medium severity rating due to its potential to cause a denial of service by crashing the libvirtd process.

  • How do I fix CVE-2013-6436?

    To fix CVE-2013-6436, update libvirt to a version later than 1.2.0 where the vulnerability has been addressed.

  • Which versions of libvirt are affected by CVE-2013-6436?

    CVE-2013-6436 affects libvirt versions 1.0.5 through 1.2.0.

  • What type of attack does CVE-2013-6436 enable?

    CVE-2013-6436 enables local users to launch a denial of service attack by causing a NULL pointer dereference.

  • Who is impacted by CVE-2013-6436?

    CVE-2013-6436 impacts local users who can interact with LXC guests in a libvirt environment, potentially allowing them to crash the libvirtd service.

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