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No exploitation reportedFix available

CVE-2018-15599

No exploitation reported by the sources we read.

  • Published2018-08-21
  • WeaknessCWE-200

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2018-08-2101:29CVE publishedNVD

Versions per branch

NVD
Debian debian linux
BranchAffectedFixed in
8.0= 8.0no fix published
Dropbear ssh project dropbear ssh
BranchAffectedFixed in
2018.76≤ 2018.76no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • dropbearUbuntu:Pro:18.04:LTSall versions · no fixed version listed
  • dropbearUbuntu:16.04:LTSall versions · no fixed version listed
  • dropbearMageia:6all versions · fixed in 2017.75-1.1.mga6
  • dropbearDebian:14all versions · fixed in 2018.76-4
  • dropbearDebian:13all versions · fixed in 2018.76-4
  • dropbearDebian:12all versions · fixed in 2018.76-4
  • dropbearDebian:8all versions · fixed in 2014.65-1+deb8u3
  • dropbearCleanStartall versions · fixed in 2018.76-r2

21 more package ranges on OSV.dev

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Published
2018-08-21
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-g4h3-rm2q-r287

Frequently asked questions

What is CVE-2018-15599?

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.

Is CVE-2018-15599 actively exploited?

Active exploitation of CVE-2018-15599 has not been confirmed. Its EPSS score was 2.7% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-15599?

CVE-2018-15599 has a CVSS v3 base score of 5.3 (MEDIUM severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

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