The recv_msg_userauth_request function in svr-auth.c in Dropbear through 2018.76 is prone…
Priority LOW 29CWE-200Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-200.
Summary
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.
Why it matters now
EPSS 0.02686 85th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Debian |
| cpe:2.3:a:dropbear_ssh_project:dropbear_ssh:*:*:*:*:*:*:*:* | up to 2018.76 | Vulnerable | Dropbear SSH Project |
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
- cpe:2.3:a:dropbear_ssh_project:dropbear_ssh:*:*:*:*:*:*:*:* Versions up to 2018.76 Vulnerable ·Dropbear SSH Project
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2018-15599
- 2026-10-03 Alias added: GHSA-g4h3-rm2q-r287
References
Advisory 4
- http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002109.html
- http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002108.html
- [debian-lts-announce] 20180827 [SECURITY] [DLA 1476-1] dropbear security update
- https://old.reddit.com/r/blackhat/comments/97ywnm/openssh_username_enumeration/e4e05n2/
Sources
- CVE-2018-15599 · CVE Program
- CVE-2018-15599 · NVD
- FIRST EPSS
- GHSA-g4h3-rm2q-r287 · GitHub Advisory Database · CC BY 4.0
- CVE-2018-15599 · Red Hat security data · CC BY 4.0
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