Home/CVE/The recv_msg_userauth_request function in svr-auth.c in Dropbear through 2018.76 is prone to a user enumeration vulnerab
CVE

CVE-2018-15599

The recv_msg_userauth_request function in svr-auth.c in Dropbear through 2018.76 is prone to a user enumeration vulnerab

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.

MEDIUM · CVSS 5.3 EPSS 0.00524
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
▤

Affected Products & Versions

2
debian linuxall versions
dropbear ssh project dropbear ssh<= 2018.76
▣

Scoring & Timeline

5.3
MEDIUM · CVSS v3.0 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD21 Aug 2018 · 01:29 AM
CVSS VectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
⚑

Vendor Advisories

1
suse-csafopenSUSE-SU-2024:11383-1
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002108.htmlMailing ListThird Party Advisory
http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002109.htmlMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/08/msg00026.htmlMailing ListThird Party Advisory
https://matt.ucc.asn.au/dropbear/CHANGES
https://old.reddit.com/r/blackhat/comments/97ywnm/openssh_username_enumeration/e4e05n2/Third Party Advisory
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