CVE-2017-18594

HighCVSS 7.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.0 7.5/10CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-415

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00073.html
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00075.html
https://github.com/AMatchandaHaystack/Research/blob/master/Nmap%26libsshDFThird Party Advisory
https://github.com/nmap/nmap/commit/350bbe0597d37ad67abe5fef8fba984707b4e9adPatch, Third Party Advisory
https://github.com/nmap/nmap/issues/1077Patch, Third Party Advisory
https://github.com/nmap/nmap/issues/1227Exploit, Third Party Advisory
https://seclists.org/nmap-announce/2019/0Mailing List, Third Party Advisory
https://seclists.org/nmap-dev/2018/q2/45Mailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00073.html
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00075.html
https://github.com/AMatchandaHaystack/Research/blob/master/Nmap%26libsshDFThird Party Advisory
https://github.com/nmap/nmap/commit/350bbe0597d37ad67abe5fef8fba984707b4e9adPatch, Third Party Advisory
https://github.com/nmap/nmap/issues/1077Patch, Third Party Advisory
https://github.com/nmap/nmap/issues/1227Exploit, Third Party Advisory
https://seclists.org/nmap-announce/2019/0Mailing List, Third Party Advisory
https://seclists.org/nmap-dev/2018/q2/45Mailing List, Third Party Advisory

Timeline

Published: Aug 29, 2019
Last modified: Jun 17, 2026
NVD status: Modified

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