CVE-2013-4314

Description

The X509Extension in pyOpenSSL before 0.13.1 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.

Category

4.3
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 0.25%
Vendor Advisory debian.org Vendor Advisory opensuse.org Vendor Advisory ubuntu.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.debian.org/security/2013/dsa-2763 vendor advisory
https://mail.python.org/pipermail/pyopenssl-users/2013-September/000478.html mailing list
https://bugzilla.redhat.com/show_bug.cgi?id=1005325
http://lists.opensuse.org/opensuse-updates/2013-11/msg00015.html vendor advisory
http://www.openwall.com/lists/oss-security/2013/09/06/2 mailing list
http://www.ubuntu.com/usn/USN-1965-1 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2013-4314?
CVE-2013-4314 has been scored as a medium severity vulnerability.
How to fix CVE-2013-4314?
To fix CVE-2013-4314, 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-2013-4314 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2013-4314 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.
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