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1) #!/usr/bin/python -tO
2) 
3) # freewvs 0.1 - the free web vulnerability scanner
4) #
5) # http://source.schokokeks.org/freewvs/
6) #
7) # Copyright 2007 Hanno Boeck, schokokeks.org <hanno@schokokeks.org>
8) #
9) # Contributions by
10) # Fabian Fingerle <fabian@datensalat.eu>
11) #
12) # This program is free software: you can redistribute it and/or modify
13) # it under the terms of the GNU General Public License as published by
14) # the Free Software Foundation, either version 3 of the License, or
15) # (at your option) any later version.
16) #
17) # This program is distributed in the hope that it will be useful,
18) # but WITHOUT ANY WARRANTY; without even the implied warranty of
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19) # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.    See the
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20) # GNU General Public License for more details.
21) #
22) # You should have received a copy of the GNU General Public License
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23) # along with this program.    If not, see <http://www.gnu.org/licenses/>.
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24) 
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25) import ConfigParser, os, glob, pprint, re, optparse, sys, gettext
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26) from xml.sax.saxutils import escape
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27) 
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28) gettext.textdomain('freewvs')
29) _ = gettext.gettext
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30) 
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31) def versioncompare(safe_version, find_version):
32)     if safe_version == [""]:
33)         return True
34)     for i in range(min(len(find_version), len(safe_version))):
35)         if int(find_version[i])<int(safe_version[i]):
36)             return True
37)         if int(find_version[i])>int(safe_version[i]):
38)             return False
39)     return (len(find_version)<len(safe_version))
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40) 
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41) def vulnprint(appname, version, safeversion, vuln, vfilename, subdir, style = None):
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42)     appdir = '/'.join(os.path.abspath(vfilename).split('/')[:-1-subdir])
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43)     if not style:
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44)         print ("%(appname)s %(version)s (%(safeversion)s) %(vuln)s %(appdir)s" \
45)               % vars())
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46)     elif style=='fancy':
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47)         print _("Directory: %(appdir)s") % vars()
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48)         if safeversion!="ok":
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49)             if safeversion!="":
50)                 print _("Vulnerable %(appname)s %(version)s found, please update to " \
51)                         "%(safeversion)s or above.") % vars()
52)             else:
53)                 print _("Vulnerable %(appname)s %(version)s found, no fixed version available." \
54)                         ) % vars()
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55)             if vuln[:3] == "CVE":
56)                 print _("http://cve.mitre.org/cgi-bin/cvename.cgi?name=%(vuln)s") \
57)                         % vars()
58)             else:
59)                 print (vuln)
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60)         else:
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61)             print _("%(appname)s %(version)s found." ) % vars()
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62)         print
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63)     elif style=='xml':
64)         state = 'vulnerable'
65)         if safeversion == 'ok':
66)             state = 'ok'
67)         print '  <app state="%s">' % state
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68)         print '    <appname>%s</appname>' % escape(appname)
69)         print '    <version>%s</version>' % escape(version)
70)         print '    <directory>%s</directory>' % escape(appdir)
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71)         if state == 'vulnerable':
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72)             print '    <safeversion>%s</safeversion>' % escape(safeversion)
73)             print '    <vulninfo>%s</vulninfo>' % escape(vuln)
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74)         print '  </app>'
75) 
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76) 
77) pp = pprint.PrettyPrinter(indent=4)
78) 
79) # Command-line options
80) parser = optparse.OptionParser()
81) parser.add_option("-a", "--all", action="store_true", dest="ALL",
82)                   help="Show all webapps found, not just vulnerable")
83) parser.add_option("-d", "--debug", action="store_true", dest="DEBUG",
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84)                   help="Show lots of debugging output, mainly useful"+ \
85)                   "for development")
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86) parser.add_option("-f", "--fancy", action="store_const", dest="OUTPUT", const="fancy",
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87)                   help="Show more fancy output")
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88) parser.add_option("-x", "--xml", action="store_const", dest="OUTPUT", const="xml",
89)                   help="Output results as XML")
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90) opts, args = parser.parse_args()
91) 
92) # Parse vulnerability database
93) config = ConfigParser.ConfigParser()
94) config.read(glob.glob('/usr/share/freewvs/*.freewvs'))
95) config.read(glob.glob('/usr/local/share/freewvs/*.freewvs'))
96) config.read(glob.glob(os.path.dirname(sys.argv[0])+'/freewvsdb/*.freewvs'))
97) 
98) vdb = []
99) for sect in config.sections():
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100)     item = {}
101) 
102)     # base options
103)     item['name'] = sect
104)     item['safe'] = config.get(sect, 'safe')
105)     item['file'] = config.get(sect, 'file')
106)     item['vuln'] = config.get(sect, 'vuln')
107)     item['subdir'] = int(config.get(sect, 'subdir'))
108) 
109)     # match magic
110)     item['variable'] = []
111)     for var in config.get(sect,'variable').split(","):
112)         item['variable'].append(re.compile(re.escape(var)+
113)                                 r"[^0-9.]*[.]*([0-9.]*[0-9])[^0-9.]"))
114) 
115)     # optional options
116)     if config.has_option(sect,'extra_match'):
117)         item['extra_match'] = config.get(sect,'extra_match')
118)     else:
119)         item['extra_match'] = False
120)     if config.has_option(sect,'add_minor'):
121)         item['add_minor'] = config.get(sect,'add_minor')
122)     else:
123)         item['add_minor'] = False
124)     if config.has_option(sect,'old_safe'):
125)         item['old_safe'] = config.get(sect,'old_safe').split(",")
126)     else:
127)         item['old_safe'] = []
128) 
129)     vdb.append(item)
130) if opts.DEBUG:
131)     pp.pprint(vdb)
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132) 
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133) if opts.OUTPUT == 'xml':
134)   print '<?xml version="1.0" ?>'
135)   print '<freewvs>'
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136) 
137) # start the search
138) 
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139) for fdir in args:
140)     for root, NULL, files in os.walk(fdir):
141)         for filename in files:
142)             for item in vdb:
143)                 if filename == item['file']:
144)                     mfile = os.path.join(root, filename)
145)                     file = open(mfile)
146)                     filestr = file.read()
147)                     file.close()
148) 
149)                     if item['extra_match']:
150)                         ematch = (filestr.find(item['extra_match']) != -1)
151)                     else:
152)                         ematch = True
153) 
154)                     findversion = []
155)                     for var in item['variable']:
156)                         var = var.search(filestr)
157)                         if not var:
158)                             findversion = False
159)                             break
160)                         else:
161)                             findversion.append(var.group(1))
162) 
163)                     if findversion and ematch:
164)                         findversion = '.'.join(findversion)
165) 
166)                         # Very ugly phpbb workaround
167)                         if item['add_minor']:
168)                             findversion = findversion.split('.')
169)                             findversion[-1] = str(int(findversion[-1])+
170)                                             int(item['add_minor']))
171)                             findversion = '.'.join(findversion)
172) 
173)                         if not (versioncompare(item['safe'].split('.'), \
174)                                 findversion.split('.'))) or \
175)                                 item['old_safe'].count(findversion)>0:
176)                             if opts.ALL:
177)                                 if opts.DEBUG:
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178)                                     print ("File "+mfile)
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179)                                 vulnprint(item['name'], findversion, \
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180)                                           "ok", "", mfile, item['subdir'], \
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181)                                           opts.OUTPUT)
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182)                         else:
183)                             if opts.DEBUG:
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184)                                 print ("File "+mfile)
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185)                             safev="9999"
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186)                             for ver in item['old_safe']:
187)                                 if (versioncompare(ver.split('.'), \
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188)                                     findversion.split('.') ) and \
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189)                                     not versioncompare(ver.split('.'), \
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190)                                     safev.split('.')) ):
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191)                                     safev=ver
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192)                             if safev=="9999":
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193)                                 safev=item['safe']
194) 
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195)                             vulnprint (item['name'], findversion, \
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196)                                        safev, item['vuln'], \
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197)                                        mfile, item['subdir'], opts.OUTPUT)
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198) 
199)                     else:
200)                         if opts.DEBUG:
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201)                             print ("regexp failed for " + \
202)                                   item['name'] + " on " + mfile)