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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade dropbear | Nov 9, 2018 | Aug 21, 2018 |
| Debian | — | Upgrade dropbear | Feb 19, 2019 | Aug 20, 2018 |
| Ubuntu | — | No solution exists | Jun 26, 2025 | Aug 21, 2018 |
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