CVE-2013-7440

22

FAUCET Score

CVE-2013-7440 describes a vulnerability in the ssl.match_hostname function of CPython (Python) versions prior to 2.7.9 and 3.x prior to 3.3.3. This flaw allows man-in-the-middle attackers to spoof servers by exploiting improper wildcard handling in hostnames within crafted certificates. With a CVSS score of 5.9 (Medium), this vulnerability has a high impact on integrity, requiring high attack complexity but no user interaction. There is no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed in CISA's KEV catalog.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		<= 2.7.8CPE matchmatch criteria	cpe:2.3:a:python:python::::::::
		3.0CPE matchmatch criteria	cpe:2.3:a:python:python:3.0:::::::*
		3.0.1CPE matchmatch criteria	cpe:2.3:a:python:python:3.0.1:::::::*
		3.1CPE matchmatch criteria	cpe:2.3:a:python:python:3.1:::::::*
		3.1.1CPE matchmatch criteria	cpe:2.3:a:python:python:3.1.1:::::::*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

Exploitability Score

2.2

Impact Score

3.6

CvssVersion

3.0

Exploit Intelligence

EPSS Score

1.88%

Probability of exploitation in next 30 days

EPSS Percentile

77.2%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0188 is in the 59th percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 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 (69)

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUSFixed in: python27-python-virtualenv-0:13.1.0-1.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: python27-0:1.1-25.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: python27-numpy-1:1.7.1-10.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: python27-python-0:2.7.8-16.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: python27-python-docutils-0:0.11-2.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: python27-python-pip-0:7.1.0-2.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: python27-python-pymongo-0:3.2.1-1.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: python27-python-virtualenv-0:13.1.0-1.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: python27-PyYAML-0:3.10-14.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: python27-scipy-0:0.12.1-3.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUSFixed in: python27-0:1.1-25.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUSFixed in: python27-numpy-1:1.7.1-10.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUSFixed in: python27-python-0:2.7.8-16.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUSFixed in: python27-python-docutils-0:0.11-2.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUSFixed in: python27-python-pip-0:7.1.0-2.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUSFixed in: python27-python-pymongo-0:3.2.1-1.el6

redhatpatch availablevia redhat_api

Product: Red Hat Satellite 6.0Fixed in: python-httplib2-0:0.6.0-6.el7sat

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUSFixed in: python27-PyYAML-0:3.10-14.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUSFixed in: python27-scipy-0:0.12.1-3.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUSFixed in: python27-0:1.1-25.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUSFixed in: python27-numpy-1:1.7.1-10.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUSFixed in: python27-python-0:2.7.8-16.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUSFixed in: python27-python-docutils-0:0.11-2.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUSFixed in: python27-python-pip-0:7.1.0-2.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUSFixed in: python27-python-pymongo-0:3.2.1-1.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUSFixed in: python27-python-virtualenv-0:13.1.0-1.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUSFixed in: python27-PyYAML-0:3.10-14.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUSFixed in: python27-scipy-0:0.12.1-3.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: python27-0:1.1-25.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: python27-numpy-1:1.7.1-10.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: python27-python-0:2.7.8-14.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: python27-python-pip-0:7.1.0-2.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: python27-python-pymongo-0:3.2.1-1.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: python27-python-virtualenv-0:13.1.0-1.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: python27-PyYAML-0:3.10-14.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: python27-scipy-0:0.12.1-4.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.1 EUSFixed in: python27-0:1.1-25.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.1 EUSFixed in: python27-numpy-1:1.7.1-10.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.1 EUSFixed in: python27-python-0:2.7.8-14.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.1 EUSFixed in: python27-python-pip-0:7.1.0-2.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.1 EUSFixed in: python27-python-pymongo-0:3.2.1-1.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.1 EUSFixed in: python27-python-virtualenv-0:13.1.0-1.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.1 EUSFixed in: python27-PyYAML-0:3.10-14.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.1 EUSFixed in: python27-scipy-0:0.12.1-4.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUSFixed in: python27-0:1.1-25.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUSFixed in: python27-numpy-1:1.7.1-10.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUSFixed in: python27-python-0:2.7.8-14.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUSFixed in: python27-python-pip-0:7.1.0-2.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUSFixed in: python27-python-pymongo-0:3.2.1-1.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUSFixed in: python27-python-virtualenv-0:13.1.0-1.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUSFixed in: python27-PyYAML-0:3.10-14.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUSFixed in: python27-scipy-0:0.12.1-4.el7

redhatvendor investigatingvia redhat_api

Product: Red Hat Enterprise Linux OpenStack Platform 7 (Kilo)Fixed in: python-pymongo

redhatvendor investigatingvia redhat_api

Product: Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse)Fixed in: python-pymongo

redhatvendor investigatingvia redhat_api

Product: Red Hat Enterprise Linux OpenStack Platform 6 (Juno)Fixed in: python-pymongo

redhatend of lifevia redhat_api

Product: Red Hat OpenShift Enterprise 2Fixed in: python27-python-pip

redhatend of lifevia redhat_api

Product: Red Hat OpenShift Enterprise 2Fixed in: python-pymongo

redhatend of lifevia redhat_api

Product: Red Hat OpenShift Enterprise 2Fixed in: python-virtualenv

redhatend of lifevia redhat_api

Product: Red Hat OpenStack Platform 4Fixed in: python-backports-ssl_match_hostname

redhatend of lifevia redhat_api

Product: Red Hat OpenStack Platform 4Fixed in: python-pymongo

redhatend of lifevia redhat_api

Product: Red Hat Software CollectionsFixed in: python33-python

redhatend of lifevia redhat_api

Product: Red Hat Software CollectionsFixed in: python33-python-pymongo

redhatend of lifevia redhat_api

Product: Red Hat Software CollectionsFixed in: python33-python-virtualenv

redhatend of lifevia redhat_api

Product: Red Hat Software CollectionsFixed in: rh-python34-python-pip

redhatend of lifevia redhat_api

Product: Red Hat Software CollectionsFixed in: rh-python34-python-virtualenv

redhatend of lifevia redhat_api

Product: Red Hat Enterprise Linux 7Fixed in: bzr

redhatend of lifevia redhat_api

Product: Red Hat Storage 2Fixed in: python-backports-ssl_match_hostname

redhatend of lifevia redhat_api

Product: Red Hat Enterprise Linux 7Fixed in: python-virtualenv

redhatend of lifevia redhat_api

Product: Red Hat Enterprise Linux OpenStack Platform 6 (Juno)Fixed in: python-pip

Vendor Advisories (1)

redhatCVE-2013-7440Low

python: wildcard matching rules do not follow RFC 6125

References

access.redhat.com / errata/RHSA-2016:1166

bugs.python.org / issue17997

bugzilla.redhat.com / show_bug.cgi

seclists.org / oss-sec/2015/q2/483

seclists.org / oss-sec/2015/q2/523

hg.python.org / cpython/rev/10d0edadbcdd

securityfocus.com / bid/74707