Vulnerability Monitor

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CVE-2013-4073

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.

Security Impact Summary

CVE-2013-4073 is a security vulnerability that . Impacting 1 product from ruby-lang organizations running these solutions should prioritize assessment and patching.

Historical Context

Documented in 2013, this vulnerability occurred amid the cloud computing expansion era, where traditional network perimeter security models were being reevaluated. Organizations were transitioning from isolated infrastructure to interconnected systems, creating new attack surfaces that vulnerabilities like this could exploit.

Published

2013-08-18T02:52:22.917

Last Modified

2025-04-11T00:51:21.963

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 6.8 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

8.6

Impact Score

6.4

Weaknesses

Type: Primary
CWE-310

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	ruby-lang	ruby	1.8.6-26	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.8.7	Yes
Application	ruby-lang	ruby	1.9.3	Yes
Application	ruby-lang	ruby	1.9.3	Yes
Application	ruby-lang	ruby	1.9.3	Yes
Application	ruby-lang	ruby	1.9.3	Yes
Application	ruby-lang	ruby	1.9.3	Yes
Application	ruby-lang	ruby	1.9.3	Yes
Application	ruby-lang	ruby	1.9.3	Yes
Application	ruby-lang	ruby	1.9.3	Yes
Application	ruby-lang	ruby	1.9.3	Yes
Application	ruby-lang	ruby	1.9.3	Yes
Application	ruby-lang	ruby	2.0.0	Yes
Application	ruby-lang	ruby	2.0.0	Yes
Application	ruby-lang	ruby	2.0.0	Yes
Application	ruby-lang	ruby	2.0.0	Yes
Application	ruby-lang	ruby	2.0.0	Yes
Application	ruby-lang	ruby	2.0.0	Yes

References

http://forums.interworx.com/threads/8000-InterWorx-Version-5-0-14-Released-on-Beta-Channel%21 ([email protected])
http://lists.apple.com/archives/security-announce/2013/Oct/msg00004.html ([email protected])
http://lists.opensuse.org/opensuse-updates/2013-07/msg00042.html ([email protected])
http://lists.opensuse.org/opensuse-updates/2013-07/msg00044.html ([email protected])
http://rhn.redhat.com/errata/RHSA-2013-1090.html ([email protected])
http://rhn.redhat.com/errata/RHSA-2013-1103.html ([email protected])
http://rhn.redhat.com/errata/RHSA-2013-1137.html ([email protected])
http://support.apple.com/kb/HT6150 ([email protected])
http://www.debian.org/security/2013/dsa-2738 ([email protected])
http://www.debian.org/security/2013/dsa-2809 ([email protected])
http://www.ruby-lang.org/en/news/2013/06/27/hostname-check-bypassing-vulnerability-in-openssl-client-cve-2013-4073/ Vendor Advisory ([email protected])
http://www.ubuntu.com/usn/USN-1902-1 ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=979251 ([email protected])
https://puppet.com/security/cve/cve-2013-4073 ([email protected])
http://forums.interworx.com/threads/8000-InterWorx-Version-5-0-14-Released-on-Beta-Channel%21 (af854a3a-2127-422b-91ae-364da2661108)
http://lists.apple.com/archives/security-announce/2013/Oct/msg00004.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-updates/2013-07/msg00042.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-updates/2013-07/msg00044.html (af854a3a-2127-422b-91ae-364da2661108)
http://rhn.redhat.com/errata/RHSA-2013-1090.html (af854a3a-2127-422b-91ae-364da2661108)
http://rhn.redhat.com/errata/RHSA-2013-1103.html (af854a3a-2127-422b-91ae-364da2661108)
http://rhn.redhat.com/errata/RHSA-2013-1137.html (af854a3a-2127-422b-91ae-364da2661108)
http://support.apple.com/kb/HT6150 (af854a3a-2127-422b-91ae-364da2661108)
http://www.debian.org/security/2013/dsa-2738 (af854a3a-2127-422b-91ae-364da2661108)
http://www.debian.org/security/2013/dsa-2809 (af854a3a-2127-422b-91ae-364da2661108)
http://www.ruby-lang.org/en/news/2013/06/27/hostname-check-bypassing-vulnerability-in-openssl-client-cve-2013-4073/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.ubuntu.com/usn/USN-1902-1 (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=979251 (af854a3a-2127-422b-91ae-364da2661108)
https://puppet.com/security/cve/cve-2013-4073 (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For ruby-lang's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.