CVE-2017-17718: No validation of hostname certificate

December 17, 2017 (updated January 5, 2018)

Net-ldap does not validate the hostname certificate. Ruby is relying on OpenSSL, and one common mistake made by users of OpenSSL is to assume that OpenSSL will validate the hostname in the server’s certificate. did not perform hostname validation. and up contain support for hostname validation, but they still require the user to call a few functions to set it up.

References

openwall.com/lists/oss-security/2017/12/17/10
ruby-doc.org/stdlib-1.9.3/libdoc/openssl/rdoc/OpenSSL/SSL.html
github.com/ruby-ldap/ruby-net-ldap/issues/258
github.com/ruby-ldap/ruby-net-ldap/pull/279

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