#!/usr/bin/python -tO

# freewvs 0.1 - the free web vulnerability scanner
#
# http://source.schokokeks.org/freewvs/
#
# Copyright 2007 Hanno Boeck, schokokeks.org <hanno@schokokeks.org>
#
# Contributions by
# Fabian Fingerle <fabian@datensalat.eu>
#
# 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 3 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, see <http://www.gnu.org/licenses/>.

import ConfigParser, os, glob, pprint, re, optparse, sys


def versioncompare(safe_version,find_version):
  if safe_version==[""]: return True
  for i in range(min(len(find_version),len(safe_version))):
    if int(find_version[i])<int(safe_version[i]):
      return True
    if int(find_version[i])>int(safe_version[i]):
      return False
  return (len(find_version)<len(safe_version))

def vulnprint(appname,version,safeversion,vuln,filename,subdir):
  appdir='/'.join(os.path.abspath(filename).split('/')[:-1-subdir])
  print "%(appname)s %(version)s (%(safeversion)s) %(vuln)s %(appdir)s" % vars()

pp = pprint.PrettyPrinter(indent=4)

# Command-line options
parser = optparse.OptionParser()
parser.add_option("-a", "--all", action="store_true", dest="ALL",
                  help="Show all webapps found, not just vulnerable")
parser.add_option("-d", "--debug", action="store_true", dest="DEBUG",
                  help="Show lots of debugging output, mainly useful for development")
opts, args = parser.parse_args()

# Parse vulnerability database
config = ConfigParser.ConfigParser()
config.read(glob.glob('/usr/share/freewvs/*.freewvs'))
config.read(glob.glob('/usr/local/share/freewvs/*.freewvs'))
config.read(glob.glob(os.path.dirname(sys.argv[0])+'/freewvsdb/*.freewvs'))

vdb = []
for sect in config.sections():
  item={}

  # base options
  item['name']=sect
  item['safe']=config.get(sect,'safe')
  item['file']=config.get(sect,'file')
  item['vuln']=config.get(sect,'vuln')
  item['subdir']=int(config.get(sect,'subdir'))

  # match magic
  item['variable']=[]
  for var in config.get(sect,'variable').split(","):
        item['variable'].append(re.compile(re.escape(var)+r"[^0-9.]*[.]*([0-9.]*[0-9])[^0-9.]"))

  # optional options
  if config.has_option(sect,'extra_match'): item['extra_match']=config.get(sect,'extra_match')
  else: item['extra_match']=False
  if config.has_option(sect,'add_minor'): item['add_minor']=config.get(sect,'add_minor')
  else: item['add_minor']=False
  if config.has_option(sect,'old_safe'): item['old_safe']=config.get(sect,'old_safe').split(",")
  else: item['old_safe']=[]

  vdb.append(item)
if opts.DEBUG: pp.pprint(vdb)


# start the search

for dir in args:
  for root,NULL,files in os.walk(dir):
    for filename in files:
      for item in vdb:
        if filename == item['file']:
          mfile=os.path.join(root,filename)
          file=open(mfile)
          filestr=file.read()
          file.close()

          if item['extra_match']: ematch=(filestr.find(item['extra_match'])!=-1)
          else: ematch=True

          findversion=[]
          for var in item['variable']:
            var = var.search(filestr)
            if not var:
              findversion=False
              break
            else:
              findversion.append(var.group(1))

          if findversion and ematch:
            findversion='.'.join(findversion)

            # Very ugly phpbb workaround
            if item['add_minor']:
              findversion=findversion.split('.')
              findversion[-1]=str(int(findversion[-1])+int(item['add_minor']))
              findversion='.'.join(findversion)

            if not (versioncompare(item['safe'].split('.'),findversion.split('.'))) or item['old_safe'].count(findversion)>0:
              if opts.ALL:
                print "File "+mfile
                vulnprint(item['name'],findversion,"ok","",mfile,item['subdir'])
            else:
              print "File "+mfile
              vulnprint (item['name'],findversion,item['safe'],item['vuln'],mfile,item['subdir'])

          else:
            if opts.DEBUG: print "regexp failed for "+item['name']+" on "+mfile