VULNERABILITY INTELLIGENCE
CVE-2013-4073
CVSS score6.8 MEDIUM
EPSS probability2.76%
CISA KEVNot currently listed
Published2013-08-18
Last modified2026-06-16
CVSS vectorAV:N/AC:M/Au:N/C:P/I:P/A:P
Description
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.