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CVE-2013-4314

Good to know:

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Date: September 30, 2013

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.

Language: Python

Severity Score

Related Resources (11)

https://github.com/pyca/pyopenssl/commit/6bbf44a00b35fb28df1f66aa194b2fe95eab1ab2
http://lists.opensuse.org/opensuse-updates/2013-11/msg00015.html
https://github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2013-31.yaml
http://www.ubuntu.com/usn/USN-1965-1
https://github.com/pyca/pyopenssl
http://www.debian.org/security/2013/dsa-2763
http://www.openwall.com/lists/oss-security/2013/09/06/2
https://bugzilla.redhat.com/show_bug.cgi?id=1005325
https://mail.python.org/pipermail/pyopenssl-users/2013-September/000478.html
https://nvd.nist.gov/vuln/detail/CVE-2013-4314
https://www.mend.io/vulnerability-database/CVE-2013-4314

Severity Score

Weakness Type (CWE)

Improper Input Validation

CWE-20

Top Fix

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Upgrade to version pyOpenSSL - 0.13.1

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CVSS v3.1

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

CVSS v2

Base Score:
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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