HRG008.txt

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[]   
[] HRG - Hackerlounge Research Group   
[] Release: HRG008   
[] Monday 03/01/05   
[] Software PBLang 4.63 sendpm.php reply file read   
[]   
[] The author can't be held responsible for any   
damage   
[] done by a reader. You have your own resonsibility   
[] Please use this document like it's meant to.   
[]   
[][][][][][][][][][][][][][][][][][][][][][][][][][]  
[][][]   
  
Vulnerable: PBLang 4.63 (and earlier?)   
  
  
---   
  
General information:   
  
PBLang is an international BBS-software based on   
PHP. It does not require any database but bases on a   
flatfile system. Many professional features. More   
info on the project website.   
  
  
---   
  
Description:   
  
This is bad. sendpm.php contains a flaw that allows   
a registered (and logged in) user to view other users   
password hashes, as well as their PM's and other   
files on the forum (and outside of the forum   
directory even). An attacker can compromise the   
target system without any trouble using this.   
  
  
---   
  
Proof Of Concept:   
  
http://localhost/pblang/sendpm.php?to=[username]&subj=[doesnt   
matter]&num=1&orig=/home/public_html/pblang/db/members/[username]   
will load [username]'s entire account information   
including the MD5'ed password hash and maybe hidden   
email information. It will be shown in webpages   
source code, not in the page itself, so right click   
and view page source.   
  
Including /etc/passwd is possible aswell, as is any   
file on the server.   
  
  
---   
  
Fix and Vendor status:   
  
Vendor has been notified, expect official patch   
soon.   
  
  
---   
  
Greetz:   
  
All the people at hackerlounge.com, JWT,   
TGS-Security.com and JWT-Security.net.   
Specifically:   
  
Th3_R@v3n (me), Dlab, Riddick, Enjoi, Blademaster,   
Modzilla, Pingu, Jake Johnson, Afterburn, airo,   
cardiaC, chis, ComputerGeek, deep_phreeze, dudley,   
evasion, eXtacy, Mattewan, Afterburn,   
Thanatos_Starfire, Roz, Sirross, UmInAsHoE, Infinite,   
Slarty, NoUse, Snake (I hate you), Surreal (I hate   
you), -=Vanguard=-, The_IRS, puNKiey, driedice,   
Carnuss, oKiDaN, Mr.Mind, dementis, net-RIDER,   
voteforpedro, Cryptic_Override, kodaxx,   
~CreEpy~NoDquE~, Brainscan, the_exode,   
phillysteak12345, DerrtyJake, =>HeX<=, m0rk, and   
anyone else I forgot.   
  
  
---   
  
Credit:   
  
HRG - Hackerlounge Research Group   
http://www.Hackerlounge.com   
  
  
[][][][][][][][][][][][][][][][][][][][][][][][][][]  
[][][]   
[]   
[] HRG - Hackerlounge Research Group   
[] Release: HRG008   
[] Monday 03/01/05   
[] Software PBLang 4.63 sendpm.php reply file read   
[]   
[] The author can't be held responsible for any   
damage   
[] done by a reader. You have your own resonsibility   
[] Please use this document like it's meant to.   
[]   
[][][][][][][][][][][][][][][][][][][][][][][][][][]  
[][][]   
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