CVE-2017-18594: denial of service condition due to a double free when SSH connection fails

A vulnerability was found in 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.

References:

https://nvd.nist.gov/vuln/detail/CVE-2017-18594

CVE-2018-15173: Stack exhausation when -sV option is used allows for DoS

Nmap through 7.70, when the -sV option is used, allows remote attackers to cause a denial of service (stack consumption and application crash) via a crafted TCP-based service.

References:

• https://nvd.nist.gov/vuln/detail/CVE-2018-15173
• http://code610.blogspot.com/2018/07/crashing-nmap-770.html

Affected branches:

• master (3861e35f)
• 3.10-stable
• 3.9-stable
• 3.8-stable
• 3.7-stable