CVE-2013-4238
MEDIUM severity · CVSS 4.3 · Improper input validation
4.3CVSS MEDIUM
Summary
The ssl.match_hostname function in the SSL module in Python 2.6 through 3.4 does not properly handle a '\0' character in a domain name in the Subject Alternative Name field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.
Impact & exploitability
Attack vectorNetwork
Attack complexity—
Privileges required—
User interaction—
Confidentiality impactNone
Integrity impact—
Availability impactNone
Exploit probability (EPSS)1%
AV:N/AC:M/Au:N/C:N/I:P/A:N
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: http://bugs.python.org/issue18709 ↗
Additional information
- NVD record
- http://bugs.python.org/issue18709Patch
- http://lists.opensuse.org/opensuse-updates/2013-09/msg00026.htmlAdvisory
- http://lists.opensuse.org/opensuse-updates/2013-09/msg00027.htmlAdvisory
- http://lists.opensuse.org/opensuse-updates/2013-09/msg00028.htmlAdvisory
- http://lists.opensuse.org/opensuse-updates/2013-09/msg00029.htmlAdvisory
- http://lists.opensuse.org/opensuse-updates/2013-09/msg00042.htmlAdvisory
- http://lists.opensuse.org/opensuse-updates/2013-09/msg00043.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html