Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Canonical | Ubuntu Linux | 10.04 |
| Python | Python | 2.6.1 |
| Opensuse | Opensuse | 11.4 |
Related Weaknesses (CWE)
References
- http://bugs.python.org/issue18709Patch
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html
- http://lists.opensuse.org/opensuse-updates/2013-09/msg00026.htmlVendor Advisory
- http://lists.opensuse.org/opensuse-updates/2013-09/msg00027.htmlVendor Advisory
- http://lists.opensuse.org/opensuse-updates/2013-09/msg00028.htmlVendor Advisory
- http://lists.opensuse.org/opensuse-updates/2013-09/msg00029.htmlVendor Advisory
- http://lists.opensuse.org/opensuse-updates/2013-09/msg00042.htmlVendor Advisory
- http://lists.opensuse.org/opensuse-updates/2013-09/msg00043.htmlVendor Advisory
- http://rhn.redhat.com/errata/RHSA-2013-1582.html
- http://seclists.org/fulldisclosure/2014/Dec/23
- http://www.debian.org/security/2014/dsa-2880
- http://www.securityfocus.com/archive/1/534161/100/0/threaded
- http://www.ubuntu.com/usn/USN-1982-1Vendor Advisory
- http://www.vmware.com/security/advisories/VMSA-2014-0012.html
- https://bugzilla.redhat.com/show_bug.cgi?id=996381Patch
FAQ
What is CVE-2013-4238?
CVE-2013-4238 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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, wh...
How severe is CVE-2013-4238?
CVE-2013-4238 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2013-4238?
Check the references section above for vendor advisories and patch information. Affected products include: Canonical Ubuntu Linux, Python Python, Opensuse Opensuse.