CVE-2018-15599: Debian Linux

Medium severity, CVSS 5.3. EPSS: 2.7% chance of exploitation in the next 30 days.

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.

Affected products

• Debian Debian Linux: version 8.0 only
• Dropbear SSH Project Dropbear SSH: up to and including 2018.76

Published 2018-08-21. Last modified 2026-06-17.