CVE-2018-15473
OpenSSH through 7.7 is prone to a user enumeration vulnerability due to not delaying bailout for an invalid authenticating user until…
- 5.9MediumCVSS base score
- 98.7%Exploitation in 30 daysEPSS · top 0.1% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 4Public exploitsMetasploit, Nuclei and Exploit-DB
Description
OpenSSH through 7.7 is prone to a user enumeration vulnerability due to not delaying bailout for an invalid authenticating user until after the packet containing the request has been fully parsed, related to auth2-gss.c, auth2-hostbased.c, and auth2-pubkey.c.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list a Metasploit module and 3 Exploit-DB entries for it. 3 references of the record are tagged as an exploit. CISA's SSVC rates its exploitation: a proof of concept is public.
Show the exploits7
Metasploit modules1 module
- SSH Username Enumeration (Metasploit module) (opens in a new tab)
auxiliary/scanner/ssh/ssh_enumusersRank normal
Exploit-DB3 entries
- OpenSSH < 7.7 - User Enumeration (2) (Exploit-DB entry) (opens in a new tab)
EDB-ID 45939remote, linuxpublished 4 Dec 2018Not verified
- OpenSSH 2.3 < 7.7 - Username Enumeration (Exploit-DB entry) (opens in a new tab)
EDB-ID 45233remote, linuxpublished 21 Aug 2018Verified
- OpenSSH 2.3 < 7.7 - Username Enumeration (PoC) (Exploit-DB entry) (opens in a new tab)
EDB-ID 45210remote, linuxpublished 16 Aug 2018Verified
References tagged exploit3 references
- 45233 (opens in a new tab)exploitx_transferred
- 45210 (opens in a new tab)exploitx_transferred
- 45939 (opens in a new tab)exploitx_transferred
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
Published
- 7 years later
· 7 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVDNVD · Modified | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
- EPSS (exploitation in 30 days)
- 98.7% · top 0.1% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.9.
Affected products
n/a
- affected n/a
References
References18
- GLSA-201810-03 (opens in a new tab)vendor-advisoryx_transferred
- 1041487 (opens in a new tab)vdb-entryx_transferred
- 45233 (opens in a new tab)exploitx_transferred
- https://bugs.debian.org/906236 (opens in a new tab)x_transferred
- 45210 (opens in a new tab)exploitx_transferred
- https://security.netapp.com/advisory/ntap-20181101-0001/ (opens in a new tab)x_transferred
- https://github.com/openbsd/src/commit/779974d35b4859c07bc3cb8a12c74b43b0a7d1e0 (opens in a new tab)x_transferred
- USN-3809-1 (opens in a new tab)vendor-advisoryx_transferred
- [debian-lts-announce] 20180821 [SECURITY] [DLA-1474-1] openssh security update (opens in a new tab)mailing-listx_transferred
- 105140 (opens in a new tab)vdb-entryx_transferred
- DSA-4280 (opens in a new tab)vendor-advisoryx_transferred
- 45939 (opens in a new tab)exploitx_transferred
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0011 (opens in a new tab)x_transferred
- http://www.openwall.com/lists/oss-security/2018/08/15/5 (opens in a new tab)x_transferred
- RHSA-2019:0711 (opens in a new tab)vendor-advisoryx_transferred
- RHSA-2019:2143 (opens in a new tab)vendor-advisoryx_transferred
- https://www.oracle.com/security-alerts/cpujan2020.html (opens in a new tab)x_transferred
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2018-7351 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2018-15473)Record last updated .