XML External Entity vulnerability in libexpat 2.2.0 and earlier (Expat XML Parser Library) allows attackers to put the parser in an infinite loop using a malformed external entity definition from an external DTD.
www.debian.org/security/2017/dsa-3898
www.openwall.com/lists/oss-security/2017/06/17/7
www.securityfocus.com/bid/99276
www.securitytracker.com/id/1039427
github.com/libexpat/libexpat/blob/master/expat/Changes
libexpat.github.io/doc/cve-2017-9233/
lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
support.apple.com/HT208112
support.apple.com/HT208113
support.apple.com/HT208115
support.apple.com/HT208144
support.f5.com/csp/article/K03244804