Open-Xchange: Multiple buffer over reads in mbox_from_parse

Vulnerabilities were found fuzzing mboxfromparse Different inputs reproducing the behavior are 0xe7,0xdf,0x1,0x0,0x30,0x3f,0x20,0x32,0x20,0x30,0x3a,0x32,0x39,0x20,0x3f,0x3f,0x3f,0x20,0x34,0x39,0x30,0x34,0xdb,0x32,0x32,0x3a,0x32,0x36,...