User Enumeration Vulnerability in Dropbear SSH Server

CVE-2018-15599 · MEDIUM Severity

AV:N/AC:L/AU:N/C:P/I:N/A:N

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.

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