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CVE-2013-6437

17
FAUCET Score

CVE-2013-6437 describes a denial-of-service vulnerability in the libvirt driver of OpenStack Compute (Nova) versions prior to 2013.2.2 and icehouse-2. Authenticated remote attackers can exploit this by repeatedly creating and deleting instances with unique os_type settings, leading to excessive disk consumption due to the creation of new ephemeral disk backing files. The vulnerability has a CVSS score of 4.0, indicating a low severity, with an attack vector over the network, low attack complexity, and potential for partial availability impact. There is no evidence of active exploitation, no known public exploit code (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2013.1, < 2013.1.5CPE matchmatch criteria
cpe:2.3:a:openstack:nova:*:*:*:*:*:*:*:*
>= 2013.2, < 2013.2.2CPE matchmatch criteria
cpe:2.3:a:openstack:nova:*:*:*:*:*:*:*:*
2014.1CPE matchmatch criteria
cpe:2.3:a:openstack:nova:2014.1:milestone1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.0MEDIUM

AV:N/AC:L/Au:S/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
SINGLE
Exploitability Score
8.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.02%
Probability of exploitation in next 30 days
EPSS Percentile
78.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0202 is in the 91st percentile among its peer group of 21,977 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

pippatch availablevia ghsa
Product: novaFixed in: 12.0.0a0
redhatpatch availablevia redhat_api
Product: OpenStack 4 for RHEL 6Fixed in: openstack-nova-0:2013.2.2-2.el6ost
View patch
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 3Fixed in: openstack-nova

Vendor Advisories (2)

pipGHSA-hrv9-4x4c-9jc8medium

OpenStack Nova DoS through ephemeral disk backing files

May 14, 2022
redhatCVE-2013-6437Moderate

openstack-nova: DoS through ephemeral disk backing files

Dec 18, 2013

References

lists.openstack.org / pipermail/openstack-announce/2013-December/000179.html
PatchVendor Advisory
rhn.redhat.com / errata/RHSA-2014-0231.html
Third Party Advisory
bugs.launchpad.net / nova/+bug/1253980
Third Party Advisory