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Filename : bind_ports.py
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#
# Copyright (C) 2006-2010 Red Hat, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#

import gettext
translation=gettext.translation('setroubleshoot-plugins', fallback=True)
_=translation.gettext

from setroubleshoot.util import *
from setroubleshoot.Plugin import Plugin

class plugin(Plugin):
    summary =_('''
    SELinux is preventing $SOURCE_PATH from binding to port $PORT_NUMBER.
    ''')

    problem_description = _('''
    SELinux has denied the $SOURCE from binding to a network port $PORT_NUMBER which does not have an SELinux type associated with it.
    If $SOURCE should be allowed to listen on $PORT_NUMBER, use the <i>semanage</i> command to assign $PORT_NUMBER to a port type that $SOURCE_TYPE can bind to (%s).
    \n\nIf $SOURCE is not supposed
    to bind to $PORT_NUMBER, this could signal an intrusion attempt.
    ''')

    fix_description = _('''
    If you want to allow $SOURCE to bind to port $PORT_NUMBER, you can execute \n
    # semanage port -a -t PORT_TYPE -p %s $PORT_NUMBER
    \nwhere PORT_TYPE is one of the following: %s.

    \n\nIf this system is running as an NIS Client, turning on the allow_ypbind boolean may fix the problem.  setsebool -P allow_ypbind=1.
    ''')

    fix_cmd = ''
    if_text = _('If you want to allow $SOURCE_PATH to bind to network port $PORT_NUMBER')
    then_text = 'you need to modify the port type.'

    def get_do_text(self, avc, options):
        ports = options[1].split(",")
        if len(ports) > 1:
            return _("""# semanage port -a -t PORT_TYPE -p %s $PORT_NUMBER
    where PORT_TYPE is one of the following: %s.""") % options
        else:
            return _("# semanage port -a -t %s -p %s $PORT_NUMBER") % (options[1], options[0])

    def __init__(self):
        Plugin.__init__(self, __name__)
        self.set_priority(100)

    def analyze(self, avc):
        if (avc.matches_target_types(['hi_reserved_port_t','reserved_port_t', 'port_t', 'unreserved_port_t', ]) and
                avc.has_any_access_in(['name_bind'])):
            # MATCH
            allowed_types = avc.allowed_target_types()
            if allowed_types:
                return self.report((avc.tclass.split("_")[0], ", ".join(allowed_types)))

        return None