CVE-2017-18594

Name	CVE-2017-18594
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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
nmap (PTS)	stretch	7.40-1	vulnerable
	buster	7.70+dfsg1-6+deb10u2	vulnerable
	bullseye	7.91+dfsg1+really7.80+dfsg1-2	fixed
	sid, bookworm	7.92+dfsg2-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
nmap	source	(unstable)	7.80+dfsg1-1	unimportant

Notes

https://github.com/nmap/nmap/commit/350bbe0597d37ad67abe5fef8fba984707b4e9ad
https://github.com/nmap/nmap/issues/1077
https://github.com/nmap/nmap/issues/1227
Crash in CLI tool, no security impact