CVE Database


Impact: Moderate
Public: 2013-06-27
Bugzilla: 979251: CVE-2013-4073 ruby: hostname check bypassing vulnerability in SSL client
IAVA: 2014-A-0030


The MITRE CVE dictionary describes this issue as:

The OpenSSL::SSL.verify_certificate_identity function in lib/openssl/ssl.rb in Ruby 1.8 before 1.8.7-p374, 1.9 before 1.9.3-p448, and 2.0 before 2.0.0-p247 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.

Find out more about CVE-2013-4073 from the MITRE CVE dictionary and NIST NVD.

CVSS v2 metrics

Base Score: 4.3
Base Metrics: AV:N/AC:M/Au:N/C:N/I:P/A:N
Access Vector: Network
Access Complexity: Medium
Authentication: None
Confidentiality Impact: None
Integrity Impact: Partial
Availability Impact: None

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat security errata

Platform Errata Release Date
RHOSE Client 1.2 (ruby193-ruby) RHSA-2013:1137 August 05, 2013
Red Hat Enterprise Linux OpenStack Platform 3.0 (ruby193-ruby) RHSA-2013:1103 July 23, 2013
Red Hat Enterprise Linux version 5 (ruby) RHSA-2013:1090 July 17, 2013
Red Hat Enterprise Linux version 6 (ruby) RHSA-2013:1090 July 17, 2013

External References

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For clarification or corrections please contact the Red Hat Security Response Team.