php: Out-of-bounds read in base64_decode_xmlrpc in ext/xmlrpc/libxmlrpc/base64.c

An issue was discovered in PHP before 5.6.40, 7.x before 7.1.26, 7.2.x before 7.2.14, and 7.3.x before 7.3.1. xmlrpcdecode can allow a hostile XMLRPC server to cause PHP to read memory outside of allocated areas in base64decodexmlrpc in ext/xmlrpc/libxmlrpc/base64.c...