CVE-2017-18594 Information

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.

CVSS Vector

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

Reference

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/Nmap26libsshDF https://github.com/nmap/nmap/commit/350bbe0597d37ad67abe5fef8fba984707b4e9ad https://github.com/nmap/nmap/issues/1077 https://github.com/nmap/nmap/issues/1227 https://seclists.org/nmap-announce/2019/0 https://seclists.org/nmap-dev/2018/q2/45

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5