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CVE-2017-18594
nse_libssh2.cc in Nmap 7.70 is subject to a denial of service condition due to a double free when an SSH connection fails, as demonstrated…
- 7.5HighCVSS base score
- 3.2%Exploitation in 30 daysEPSS · top 12% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
nse_libssh2.cc in Nmap 7.70 is subject to a denial of service condition due to a double free when an SSH connection fails, as demonstrated by a leading \n character to ssh-brute.nse or ssh-auth-methods.nse.
Timeline
ID reserved
By mitre
Published
- 5 years later
· 5 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 |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | High7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 3.2% · top 12% of all CVEs (10 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
n/a
- affected n/a
References
8
- https://seclists.org/nmap-dev/2018/q2/45 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/nmap/nmap/issues/1227 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/nmap/nmap/commit/350bbe0597d37ad67abe5fef8fba984707b4e9ad (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/nmap/nmap/issues/1077 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/AMatchandaHaystack/Research/blob/master/Nmap%26libsshDF (opens in a new tab)x_refsource_MISCx_transferred
- https://seclists.org/nmap-announce/2019/0 (opens in a new tab)x_refsource_MISCx_transferred
- openSUSE-SU-2019:2198 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- openSUSE-SU-2019:2200 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_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-2017-9707 (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-2017-18594)Record last updated .