CVE-2013-7440

Description

The ssl.match_hostname function in CPython (aka Python) before 2.7.9 and 3.x before 3.3.3 does not properly handle wildcards in hostnames, which might allow man-in-the-middle attackers to spoof servers via a crafted certificate.

Category

5.9
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.32%
Vendor Advisory redhat.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://seclists.org/oss-sec/2015/q2/483 mailing list
https://access.redhat.com/errata/RHSA-2016:1166 vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1224999
https://hg.python.org/cpython/rev/10d0edadbcdd
https://bugs.python.org/issue17997
http://www.securityfocus.com/bid/74707 vdb entry
http://seclists.org/oss-sec/2015/q2/523 mailing list

Frequently Asked Questions

What is the severity of CVE-2013-7440?
CVE-2013-7440 has been scored as a medium severity vulnerability.
How to fix CVE-2013-7440?
To fix CVE-2013-7440, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2013-7440 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2013-7440 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.