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CVE-2013-1664

16
FAUCET Score

CVE-2013-1664 describes a denial-of-service vulnerability affecting the XML libraries in various Python versions (2.6-3.4) and several OpenStack components, including Keystone, Nova, and Cinder. This flaw allows remote attackers to trigger resource exhaustion and system crashes through an XML Entity Expansion (XEE) attack. With a CVSS score of 5.0, this vulnerability is considered medium severity, requiring no authentication and having low attack complexity, but only resulting in partial availability impact. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:openstack:cinder_folsom:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:openstack:compute_\(nova\)_essex:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:openstack:compute_\(nova\)_folsom:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:openstack:folsom:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:openstack:grizzly:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.86%
Probability of exploitation in next 30 days
EPSS Percentile
91.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0486 is in the 88th percentile among its peer group of 23,684 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 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 (9)

pippatch availablevia ghsa
Product: DjangoFixed in: 1.3.6
pippatch availablevia ghsa
Product: DjangoFixed in: 1.4.4
redhatpatch availablevia redhat_api
Product: OpenStack Folsom for RHEL 6Fixed in: openstack-keystone-0:2012.2.3-3.el6ost
View patch
redhatpatch availablevia redhat_api
Product: OpenStack Folsom for RHEL 6Fixed in: openstack-nova-0:2012.2.3-4.el6ost
View patch
redhatpatch availablevia redhat_api
Product: OpenStack Folsom for RHEL 6Fixed in: openstack-cinder-0:2012.2.3-4.el6ost
View patch
redhatpatch availablevia redhat_api
Product: OpenStack Folsom for RHEL 6Fixed in: Django14-0:1.4.4-1.el6ost
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: python
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: python
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: python

Vendor Advisories (2)

pipGHSA-qrh7-x6fp-c2mpmedium

XML Entity Expansion (XEE) in Django

May 17, 2022
redhatCVE-2013-1664Moderate

bindings: Internal entity expansion in Python XML libraries inflicts DoS vulnerabilities

Feb 19, 2013

References

blog.python.org / 2013/02/announcing-defusedxml-fixes-for-xml.html
bugs.python.org / issue17239
lists.openstack.org / pipermail/openstack-announce/2013-February/000078.html
Vendor Advisory
rhn.redhat.com / errata/RHSA-2013-0657.html
rhn.redhat.com / errata/RHSA-2013-0658.html
rhn.redhat.com / errata/RHSA-2013-0670.html
bugs.launchpad.net / nova/+bug/1100282
Exploit
ubuntu.com / usn/usn-1757-1
openwall.com / lists/oss-security/2013/02/19/2
openwall.com / lists/oss-security/2013/02/19/4