FreeBSD: VID-4f8665d0-0465-11e9-b77a-6cc21735f730: shibboleth-sp -- crashes on malformed date/time content

The Shibboleth Consortium reports: SAML messages, assertions, and metadata all commonly contain date/time information in a standard XML format. Invalid formatted data in such fields cause an exception of a type that was not handled properly in the V3 software and causes a crash (usually to the shibd daemon process, but possibly to Apache in rare cases). Note that the crash occurs prior to evaluation of a message's authenticity, so can be exploited by an untrusted attacker. The problem is believed to be specific to the V3 software and would not cause a crash in the older, now unsupported, V2 software.