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Questions about plugin design
From: hdm at metasploit.com (H D Moore)
Date: Fri, 9 Sep 2005 00:54:21 -0500

You should be able to use all of the cmd payloads, it just takes a bit 
more work on the module side. Just spawn a subshell to work around perl 
open() restrictions, use ${IFS} to replace spaces, and fun things like 
that. In your case, something like the following might work:

$cmd = "sh -c '$rawshellcode'|"

For instance, the following code works:

$ perl -e 'open (X, shift()); while(<X>) { print "READ: $_\n" }'  \
 "sh -c 'cat /etc/passwd|grep root'|"
READ: root:x:0:0:root:/root:/bin/bash

On Thursday 08 September 2005 08:59, Nicolas Gregoire wrote:

I'm actually writing a plugin exploiting a vulnerable Perl open(), and
I've some design questions :

- should the Check() function test that the HTTP return code is 200,
that the right headers are present or try to read a file ?
- as the vuln is a Perl open(), there's no way to directly use shell
tricks (like "telnet|sh|telnet"). How to tell the plugin that
'cmd_generic' is the only usuable payload ?


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