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CVE-2013-4238

Date: August 17, 2013

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.

Language: C

Severity Score

3.7

Related Resources (21)

Url: http://lists.opensuse.org/opensuse-updates/2013-09/msg00027.html

Url: http://seclists.org/fulldisclosure/2014/Dec/23

Url: http://www.ubuntu.com/usn/USN-1982-1

Url: http://lists.opensuse.org/opensuse-updates/2013-09/msg00028.html

Url: http://www.vmware.com/security/advisories/VMSA-2014-0012.html

Url: https://security-tracker.debian.org/tracker/CVE-2013-4238

Url: http://lists.opensuse.org/opensuse-updates/2013-09/msg00043.html

Url: http://www.securityfocus.com/archive/1/534161/100/0/threaded

Url: http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html

Url: http://rhn.redhat.com/errata/RHSA-2013-1582.html

Url: https://access.redhat.com/security/cve/CVE-2013-4238

Url: http://lists.opensuse.org/opensuse-updates/2013-09/msg00029.html

Url: https://people.canonical.com/~ubuntu-security/cve/CVE-2013-4238

Url: http://www.debian.org/security/2014/dsa-2880

Url: https://bugzilla.redhat.com/show_bug.cgi?id=996381

Url: http://bugs.python.org/issue18709

Url: https://nvd.nist.gov/vuln/detail/CVE-2013-4238

Url: https://bugs.python.org/issue18709

Url: http://lists.opensuse.org/opensuse-updates/2013-09/msg00026.html

Url: http://lists.opensuse.org/opensuse-updates/2013-09/msg00042.html

Url: https://www.mend.io/vulnerability-database/CVE-2013-4238

Severity Score

3.7

Weakness Type (CWE)

Improper Input Validation

CWE-20

CVSS v3.1

Base Score:	3.7
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	HIGH
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	NONE
Integrity (I):	LOW
Availability (A):	NONE

CVSS v2

Base Score:	4.3
Access Vector (AV):	NETWORK
Access Complexity (AC):	MEDIUM
Authentication (AU):	NONE
Confidentiality (C):	NONE
Integrity (I):	PARTIAL
Availability (A):	NONE
Additional information:

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CVE-2013-4238

Date: August 17, 2013

Language: C

Severity Score

Related Resources (21)

Severity Score

Weakness Type (CWE)

CVSS v3.1

CVSS v2

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