Fix issue #732
mpgn
parent
ce1293b12c
commit
60a7d8bdc0
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@ -4,8 +4,13 @@
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import ldap3
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import ssl
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import asyncio
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from msldap.connection import MSLDAPClientConnection
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from msldap.commons.factory import LDAPConnectionFactory
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from msldap.commons.target import MSLDAPTarget
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from asyauth.common.constants import asyauthProtocol, asyauthSecret
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from asyauth.common.credentials.ntlm import NTLMCredential
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from asyauth.common.credentials.kerberos import KerberosCredential
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class CMEModule:
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'''
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@ -17,7 +22,7 @@ class CMEModule:
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name = 'ldap-checker'
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description = 'Checks whether LDAP signing and binding are required and / or enforced'
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supported_protocols = ['ldap']
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opsec_safe= True
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opsec_safe = True
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multiple_hosts = True
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def options(self, context, module_options):
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@ -67,28 +72,27 @@ class CMEModule:
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#you can determine whether the policy is set to "never" or
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#if it's set to "when supported" based on the potential
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#error recieved from the bind attempt.
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async def run_ldaps_withEPA(inputUser, inputPassword, dcTarget):
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try:
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url = 'ldaps+ntlm-password://'+inputUser + ':' + inputPassword +'@' + dcTarget
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conn_url = LDAPConnectionFactory.from_url(url)
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ldaps_client = conn_url.get_client()
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ldapsClientConn = MSLDAPClientConnection(ldaps_client.target, ldaps_client.creds)
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_, err = await ldapsClientConn.connect()
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if err is not None:
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context.log.error("ERROR while connecting to " + dcTarget + ": " + err)
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#forcing a miscalculation of the "Channel Bindings" av pair in Type 3 NTLM message
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ldapsClientConn.cb_data = b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
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_, err = await ldapsClientConn.bind()
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if "data 80090346" in str(err):
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return True
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elif "data 52e" in str(err):
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return False
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elif err is not None:
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context.log.error("ERROR while connecting to " + dcTarget + ": " + err)
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elif err is None:
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return False
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except Exception as e:
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context.log.error("something went wrong during ldaps_withEPA bind:" + str(e))
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async def run_ldaps_withEPA(inputUser, inputPassword, dcTarget):
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target = MSLDAPTarget(ip=connection.host, hostname=connection.hostname, domain=connection.domain, dc_ip=connection.domain)
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stype = asyauthSecret.PASS if not connection.nthash else asyauthSecret.NT
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secret = connection.password if not connection.nthash else connection.nthash
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credential = NTLMCredential(secret=secret, username=connection.username, domain=connection.domain, stype=stype)
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ldapsClientConn = MSLDAPClientConnection(target, credential)
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_, err = await ldapsClientConn.connect()
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if err is not None:
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context.log.error("ERROR while connecting to " + dcTarget + ": " + err)
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#forcing a miscalculation of the "Channel Bindings" av pair in Type 3 NTLM message
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ldapsClientConn.cb_data = b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
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_, err = await ldapsClientConn.bind()
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if "data 80090346" in str(err):
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return True
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elif "data 52e" in str(err):
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return False
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elif err is not None:
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context.log.error("ERROR while connecting to " + dcTarget + ": " + err)
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elif err is None:
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return False
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#Domain Controllers do not have a certificate setup for
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#LDAPS on port 636 by default. If this has not been setup,
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@ -142,27 +146,24 @@ class CMEModule:
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exit()
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#Run trough all our code blocks to determine LDAP signing and channel binding settings.
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try:
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ldapIsProtected = run_ldap(inputUser, inputPassword, dcTarget)
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if ldapIsProtected == False:
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context.log.highlight("LDAP Signing NOT Enforced!")
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elif ldapIsProtected == True:
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context.log.error("LDAP Signing IS Enforced")
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if DoesLdapsCompleteHandshake(dcTarget) == True:
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ldapsChannelBindingAlwaysCheck = run_ldaps_noEPA(inputUser, inputPassword, dcTarget)
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ldapsChannelBindingWhenSupportedCheck = asyncio.run(run_ldaps_withEPA(inputUser, inputPassword, dcTarget))
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if ldapsChannelBindingAlwaysCheck == False and ldapsChannelBindingWhenSupportedCheck == True:
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context.log.highlight('Channel Binding is set to \"when supported\" - Success of Attacks depends on client settings')
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elif ldapsChannelBindingAlwaysCheck == False and ldapsChannelBindingWhenSupportedCheck == False:
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context.log.highlight('Channel Binding is set to \"NEVER\" - Time to PWN!')
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elif ldapsChannelBindingAlwaysCheck == True:
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context.log.error('Channel Binding is set to \"Required\" - Meeeehhhh :(')
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else:
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context.log.error("\nSomething went wrong...")
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exit()
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ldapIsProtected = run_ldap(inputUser, inputPassword, dcTarget)
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if ldapIsProtected == False:
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context.log.highlight("LDAP Signing NOT Enforced!")
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elif ldapIsProtected == True:
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context.log.error("LDAP Signing IS Enforced")
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if DoesLdapsCompleteHandshake(dcTarget) == True:
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ldapsChannelBindingAlwaysCheck = run_ldaps_noEPA(inputUser, inputPassword, dcTarget)
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ldapsChannelBindingWhenSupportedCheck = asyncio.run(run_ldaps_withEPA(inputUser, inputPassword, dcTarget))
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if ldapsChannelBindingAlwaysCheck == False and ldapsChannelBindingWhenSupportedCheck == True:
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context.log.highlight('Channel Binding is set to \"when supported\" - Success of Attacks depends on client settings')
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elif ldapsChannelBindingAlwaysCheck == False and ldapsChannelBindingWhenSupportedCheck == False:
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context.log.highlight('Channel Binding is set to \"NEVER\" - Time to PWN!')
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elif ldapsChannelBindingAlwaysCheck == True:
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context.log.error('Channel Binding is set to \"Required\" - Meeeehhhh :(')
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else:
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context.log.error(dcTarget + " - cannot complete TLS handshake, cert likely not configured")
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except Exception as e:
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context.log.error("ERROR: " + str(e))
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context.log.error("\nSomething went wrong...")
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exit()
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else:
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context.log.error(dcTarget + " - cannot complete TLS handshake, cert likely not configured")
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