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Fencer Intel
medium 4.0

CVE-2013-6437 json

OpenStack Nova DoS through ephemeral disk backing files

published 12y ago modified 4mo ago also GHSA-hrv9-4x4c-9jc8 , PYSEC-2026-874 , EUVD-2022-4213

cvss
4.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 81%
public exploits
0
none known

Summary

The libvirt driver in OpenStack Compute (Nova) before 2013.2.2 and icehouse before icehouse-2 allows remote authenticated users to cause a denial of service (disk consumption) by creating and deleting instances with unique os_type settings, which triggers the creation of a new ephemeral disk backing file.

Patch / fix

  • pypi nova 12.0.0a0
  • openstack nova 2013.1.5, 2013.2.2
  • nova Debian 14, Debian 13, Debian 12 2013.2.2

debian advisories DEBIAN-CVE-2013-6437

  • openstack-nova openstack 4 2013.2.2-2.el6ost
  • python-nova openstack 4 2013.2.2-2.el6ost
  • openstack-nova-api openstack 4 2013.2.2-2.el6ost
  • openstack-nova-cert openstack 4 2013.2.2-2.el6ost
  • openstack-nova-cells openstack 4 2013.2.2-2.el6ost
  • openstack-nova-common openstack 4 2013.2.2-2.el6ost
  • openstack-nova-compute openstack 4 2013.2.2-2.el6ost
  • openstack-nova-console openstack 4 2013.2.2-2.el6ost

red hat advisories RHSA-2014:0231

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2013-6437 updated cvss 4.0

openstack-nova: DoS through ephemeral disk backing files

  • Red Hat OpenStack Platform 3 openstack-nova
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux OpenStack Platform 4.0 python-nova 2013.2.2-2.el6ost, openstack-nova 2013.2.2-2.el6ost, openstack-nova-api 2013.2.2-2.el6ost, openstack-nova-cert 2013.2.2-2.el6ost, openstack-nova-cells 2013.2.2-2.el6ost, openstack-nova-common 2013.2.2-2.el6ost, +7 more
    fixed: vendor fix RHSA-2014:0231

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.04% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 4.0 AV:N/AC:L/Au:S/C:N/I:N/A:P

Affected packages

ecosystem package affected fixed in
pypi nova
<12.0.0a0
12.0.0a0

Classification

Weakness
  • CWE-399 Resource Management Errors

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.