Vulnerability CVE-2013-4238
Published: 2013-08-17   Modified: 2013-08-20

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.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
Python SSL not handle certificates hostnames with NULL bytes
Murray McAlliste...
13.08.2013

Type:

CWE-20

 (Improper Input Validation)

CVSS2 => (AV:N/AC:M/Au:N/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
Python -> Python 
Opensuse -> Opensuse 
Novell -> Opensuse 
Canonical -> Ubuntu linux 

 References:
http://bugs.python.org/issue18709
http://lists.opensuse.org/opensuse-updates/2013-09/msg00026.html
http://lists.opensuse.org/opensuse-updates/2013-09/msg00027.html
http://lists.opensuse.org/opensuse-updates/2013-09/msg00028.html
http://lists.opensuse.org/opensuse-updates/2013-09/msg00029.html
http://lists.opensuse.org/opensuse-updates/2013-09/msg00042.html
http://lists.opensuse.org/opensuse-updates/2013-09/msg00043.html
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-1982-1
http://www.vmware.com/security/advisories/VMSA-2014-0012.html
https://bugzilla.redhat.com/show_bug.cgi?id=996381
Copyright 2024, cxsecurity.com

 

Back to Top