Search for vulnerabilities
Vulnerability details: VCID-7xbm-w19j-jfb9
Vulnerability ID VCID-7xbm-w19j-jfb9
Aliases CVE-2018-15599
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.
Status Published
Exploitability 0.5
Weighted Severity 4.8
Risk 2.4
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
System Score Found at
epss 0.00524 https://api.first.org/data/v1/epss?cve=CVE-2018-15599
epss 0.00524 https://api.first.org/data/v1/epss?cve=CVE-2018-15599
epss 0.00524 https://api.first.org/data/v1/epss?cve=CVE-2018-15599
epss 0.00524 https://api.first.org/data/v1/epss?cve=CVE-2018-15599
epss 0.00524 https://api.first.org/data/v1/epss?cve=CVE-2018-15599
epss 0.00524 https://api.first.org/data/v1/epss?cve=CVE-2018-15599
epss 0.00524 https://api.first.org/data/v1/epss?cve=CVE-2018-15599
epss 0.00524 https://api.first.org/data/v1/epss?cve=CVE-2018-15599
epss 0.00524 https://api.first.org/data/v1/epss?cve=CVE-2018-15599
epss 0.00524 https://api.first.org/data/v1/epss?cve=CVE-2018-15599
epss 0.00524 https://api.first.org/data/v1/epss?cve=CVE-2018-15599
epss 0.00524 https://api.first.org/data/v1/epss?cve=CVE-2018-15599
epss 0.00524 https://api.first.org/data/v1/epss?cve=CVE-2018-15599
epss 0.00524 https://api.first.org/data/v1/epss?cve=CVE-2018-15599
epss 0.00524 https://api.first.org/data/v1/epss?cve=CVE-2018-15599
epss 0.00524 https://api.first.org/data/v1/epss?cve=CVE-2018-15599
epss 0.00539 https://api.first.org/data/v1/epss?cve=CVE-2018-15599
epss 0.00539 https://api.first.org/data/v1/epss?cve=CVE-2018-15599
cvssv2 5.0 https://nvd.nist.gov/vuln/detail/CVE-2018-15599
cvssv3 5.3 https://nvd.nist.gov/vuln/detail/CVE-2018-15599
Reference id Reference type URL
http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002108.html
http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002109.html
https://api.first.org/data/v1/epss?cve=CVE-2018-15599
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15599
https://lists.debian.org/debian-lts-announce/2018/08/msg00026.html
https://matt.ucc.asn.au/dropbear/CHANGES
https://old.reddit.com/r/blackhat/comments/97ywnm/openssh_username_enumeration/e4e05n2/
906890 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=906890
cpe:2.3:a:dropbear_ssh_project:dropbear_ssh:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:dropbear_ssh_project:dropbear_ssh:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
CVE-2018-15599 https://nvd.nist.gov/vuln/detail/CVE-2018-15599
No exploits are available.
Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2018-15599
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2018-15599
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.65969
EPSS Score 0.00524
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:33:10.618538+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.21/main.json 37.0.0