HnTool is an open source (GPLv2) hardening tool for Unix. It scans your system for vulnerabilities or problems in configuration files allowing you to get a quick overview of the security status of your system.
To use HnTool download it and run: ::
# ./hntool
HnTool was already tested and is working on:
- Arch Linux
- CentOS
- Debian
- Fedora
- Gentoo
- Ubuntu
If you are using HnTool on a system that is not listed above, please, let us know.
To install HnTool run the following command, as root:
# python setup.py install --prefix /usr/ --root /
Run HnTool with:
# ./hntool
You can also see the hntool(1) manual by typing 'man hntool' at the command line or see the usage help:
$ hntool -h
There are 5 types of results:
-
OK : Means that the item checked is fine and that you do not need to worry
-
INFO: Means that you should know the item status, but probably it is fine. A port opened, for example.
-
LOW: Means that a security problem was found, but it does not provides a high risk for your system.
-
MEDIUM: Things are getting worse and you should start to worry about these itens.
-
HIGH: You have an important security hole/problem on your system and you should fix it NOW or run and save your life.
There are several ways that you can contribute and help HnTool's development. You can contribute with code, patchs, bugs and feature requests.
To report a bug or a feature request for HnTool, file a issue in our Google Code page: https://github.com/hdoria/HnTool
If you're reporting a bug, please give concrete examples of how and where the problem occurs.
If you've a patch (fixing a bug or a new HnTool module), then you can file an issue on Google Code too: http://code.google.com/p/hntool/issues/list
HnTool's source is available on:
https://github.com/hdoria/HnTool
This section documents the innards of HnTool and specifies how to create a new module.
The main HnTool program (hntool.py) runs a list of rules defined in __files__
and __services__.
-
files : defines the rules which process simple files and configs.
-
services : defines the rules which checks the security on services and daemons.
Once your module is finalized, remember to add it to the appropriate array
(__files__ or __services__) defined in hntool/__init__.py
A sample HnTool module is like this (hntool/ssh.py):
import os
import HnTool.modules.util
from HnTool.modules.rule import Rule as MasterRule
class Rule(MasterRule):
def __init__(self, options):
MasterRule.__init__(self, options)
self.short_name="ssh"
self.long_name="Checks security problems on sshd config file"
self.type="config"
self.required_files = ['/etc/ssh/sshd_config', '/etc/sshd_config']
def requires(self):
return self.required_files
def analyze(self, options):
check_results = self.check_results
ssh_conf_file = self.required_files
for sshd_conf in ssh_conf_file:
if os.path.isfile(sshd_conf):
# dict with all the lines
lines = HnTool.modules.util.hntool_conf_parser(sshd_conf)
# Checking if SSH is using the default port
if 'Port' in lines:
if int(lines['Port']) == 22:
check_results['low'].append('SSH is using the default port')
else:
check_results['ok'].append('SSH is not using the default port')
else:
check_results['low'].append('SSH is using the default port')
return check_results
Mostly, the code is self-explanatory. The following are the list of the attributes and methods that each HnTool module must have:
-
self.short_name String containing a short name of the module. Usually,this is the same as the basename of the module file.
-
self.long_name String containing a concise description of the module. This description is used when listing all the rules using hntool -l.
-
analyze(self) Should return a list comprising in turn of five lists: ok, low, medium, high and info.
-
self.type "files" or "config" for a module processing simple files and configs "services" for a module processing services and daemons