7.5
CWE
20
Advisory Published
CVE Published
Advisory Published
Updated

CVE-2013-4314: Input Validation

First published: Fri Sep 06 2013(Updated: )

The pyOpenSSL module implements hostname identity checks but it did not properly handle hostnames in the certificate that contain null bytes. In all releases prior to 0.13.1, the string formatting of subjectAltName X509Extension instances incorrectly truncated fields of the name when encountering the null byte. When a CA than an SSL client trusts issues a server certificate that has a null byte in the subjectAltName, remote attackers can obtain a certifcate for 'www.foo.org\0.example.com' from the CA to spoof 'www.foo.org' and conduct man-in-the-middle attacks between the pyOpenSSL-using client and SSL servers. [1] <a href="https://mail.python.org/pipermail/pyopenssl-users/2013-September/000478.html">https://mail.python.org/pipermail/pyopenssl-users/2013-September/000478.html</a>

Credit: secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
Jean-paul Calderone Pyopenssl<=0.13
Jean-paul Calderone Pyopenssl=0.7
Jean-paul Calderone Pyopenssl=0.8-a1
Jean-paul Calderone Pyopenssl=0.9
Jean-paul Calderone Pyopenssl=0.10
Jean-paul Calderone Pyopenssl=0.11
Jean-paul Calderone Pyopenssl=0.11-a1
Jean-paul Calderone Pyopenssl=0.11-a2
Jean-paul Calderone Pyopenssl=0.12
Canonical Ubuntu Linux=10.04
Canonical Ubuntu Linux=12.04
Canonical Ubuntu Linux=12.10
Canonical Ubuntu Linux=13.04
pip/pyOpenSSL<0.13.1
0.13.1
redhat/pyOpenSSL<0.13.1
0.13.1
<=0.13
=0.7
=0.8-a1
=0.9
=0.10
=0.11
=0.11-a1
=0.11-a2
=0.12
=10.04
=12.04
=12.10
=13.04

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2024 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203