The recv_msg_userauth_request function in svr-auth.c in Dropbear through 2018.76 is prone to a user enumeration vulnerability because username validity affects how fields in SSH_MSG_USERAUTH messages are handled, a similar issue to CVE-2018-15473 in an unrelated codebase.
CVE: (none) => CVE-2018-15599
Already reported and FIXED!!! *** This bug has been marked as a duplicate of bug 23493 ***
Resolution: (none) => DUPLICATEStatus: NEW => RESOLVED