Executive Summary

Summary
Title pyOpenSSL vulnerability
Informations
Name USN-1965-1 First vendor Publication 2013-09-23
Vendor Ubuntu Last vendor Modification 2013-09-23
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:N/I:P/A:N)
Cvss Base Score 4.3 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 13.04 - Ubuntu 12.10 - Ubuntu 12.04 LTS - Ubuntu 10.04 LTS

Summary:

Fraudulent security certificates could allow sensitive information to be exposed when accessing the Internet.

Software Description: - pyopenssl: Python wrapper around the OpenSSL library

Details:

It was discovered that pyOpenSSL did not properly handle certificates with NULL characters in the Subject Alternative Name field. An attacker could exploit this to perform a man in the middle attack to view sensitive information or alter encrypted communications.

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 13.04:
python-openssl 0.13-2ubuntu3.1
python3-openssl 0.13-2ubuntu3.1

Ubuntu 12.10:
python-openssl 0.13-2ubuntu1.1
python3-openssl 0.13-2ubuntu1.1

Ubuntu 12.04 LTS:
python-openssl 0.12-1ubuntu2.1

Ubuntu 10.04 LTS:
python-openssl 0.10-1ubuntu0.1

In general, a standard system update will make all the necessary changes.

References:
http://www.ubuntu.com/usn/usn-1965-1
CVE-2013-4314

Package Information:
https://launchpad.net/ubuntu/+source/pyopenssl/0.13-2ubuntu3.1
https://launchpad.net/ubuntu/+source/pyopenssl/0.13-2ubuntu1.1
https://launchpad.net/ubuntu/+source/pyopenssl/0.12-1ubuntu2.1
https://launchpad.net/ubuntu/+source/pyopenssl/0.10-1ubuntu0.1

Original Source

Url : http://www.ubuntu.com/usn/USN-1965-1

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-20 Improper Input Validation

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:19204
 
Oval ID: oval:org.mitre.oval:def:19204
Title: USN-1965-1 -- pyopenssl vulnerability
Description: Fraudulent security certificates could allow sensitive information to be exposed when accessing the Internet.
Family: unix Class: patch
Reference(s): USN-1965-1
CVE-2013-4314
Version: 5
Platform(s): Ubuntu 13.04
Ubuntu 12.10
Ubuntu 12.04
Ubuntu 10.04
Product(s): pyopenssl
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:19756
 
Oval ID: oval:org.mitre.oval:def:19756
Title: DSA-2763-1 pyopenssl - hostname check bypassing
Description: It was discovered that PyOpenSSL, a Python wrapper around the OpenSSL library, does not properly handle certificates with NULL characters in the Subject Alternative Name field.
Family: unix Class: patch
Reference(s): DSA-2763-1
CVE-2013-4314
Version: 5
Platform(s): Debian GNU/Linux 6.0
Debian GNU/Linux 7
Debian GNU/kFreeBSD 6.0
Debian GNU/kFreeBSD 7
Product(s): pyopenssl
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 8
Os 4

Nessus® Vulnerability Scanner

Date Description
2014-06-13 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2013-822.nasl - Type : ACT_GATHER_INFO
2013-09-25 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-2763.nasl - Type : ACT_GATHER_INFO
2013-09-24 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-1965-1.nasl - Type : ACT_GATHER_INFO
2013-09-14 Name : The remote Mandriva Linux host is missing a security update.
File : mandriva_MDVSA-2013-233.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
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3
Date Informations
2014-02-17 12:02:31
  • Multiple Updates
2013-10-01 21:23:31
  • Multiple Updates
2013-10-01 17:23:15
  • Multiple Updates
2013-09-23 21:18:55
  • First insertion