{"id":"CVE-2018-15599","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-15599","generatedAt":"2026-10-29T01:49:15.586Z","title":"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…","description":"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.","published":"2018-08-21T01:29:00.000Z","lastModified":"2026-06-17T01:42:49.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":5.3,"severity":"MEDIUM","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},"cwe":["CWE-200"],"affected":["debian/debian linux","dropbear ssh project/dropbear ssh"],"epss":{"score":0.02686,"percentile":0.85772,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (2.69%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002108.html","tags":["Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002109.html","tags":["Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2018/08/msg00026.html","tags":["Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://matt.ucc.asn.au/dropbear/CHANGES","source":"cve@mitre.org"},{"url":"https://old.reddit.com/r/blackhat/comments/97ywnm/openssh_username_enumeration/e4e05n2/","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002108.html","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002109.html","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2018/08/msg00026.html","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://matt.ucc.asn.au/dropbear/CHANGES","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://old.reddit.com/r/blackhat/comments/97ywnm/openssh_username_enumeration/e4e05n2/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-15599","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}