MyBB Multiple Security Bypass and Cross Site Scripting Vulnerabilities


Description   Multiple vulnerabilities have been identified in MyBB, which could allow attackers or malicious users to bypass security restrictions, gain knowledge of sensitive information.
The first issue is caused by an input validation error in the "moderation.php" script when processing the "url" parameter while "action" is set to "removesubscriptions" and "ajax" is set to "1", which could be exploited by attackers to cause arbitrary scripting code to be executed by the administrator's or moderator's browser in the security context of an affected site.
The second vulnerability is caused due to attachments being stored on the server with filenames generated in an insecure manner, which could allow attackers to guess the filenames and disclose sensitive information.
The third issue is caused by unspecified errors with an unknown impact and unknown attack vectors.
     
Vulnerable Products   Vulnerable Software:
MyBB versions prior to 1.4.3
     
Solution   Upgrade to MyBB version 1.4.3 : http://www.mybboard.net/downloads
     
CVE   CVE-2008-4929
CVE-2008-4928
     
References   http://community.mybboard.net/thread-39705.html
     
Vulnerability Manager Detection   No
     
IPS Protection  
ASQ Engine alarm Available Since
XSS - Prevention - GET : suspicious 'iframe' tag found in URL
3.2.0
XSS - Prevention - POST : suspicious tag with event found in data
3.2.0
XSS - Prevention - GET : suspicious tag with event found in URL
3.2.0
XSS - Prevention - POST : suspicious 'object' tag found in data
3.2.0
XSS - Prevention - GET : suspicious 'applet' tag found in URL
3.2.0
XSS - Prevention - POST : suspicious 'applet' tag found in data
3.2.0
XSS - Prevention - POST : 'location' javascript object found in data
3.2.0
XSS - Phishing : suspicious 'div' tag found in URL
3.2.0
XSS - Prevention - GET : suspicious 'style' attribute found in URL
3.2.0
XSS - Prevention - POST : javascript code found in data
3.2.0
XSS - Prevention - POST : suspicious 'iframe' tag found in data
3.2.0
XSS - Prevention - POST : code allowing cookie access found in data
3.2.0
XSS - Phishing : suspicious 'a' tag found in URL
3.2.0
XSS - Prevention - GET : cookie access attempt using script language found in URL
3.2.0
XSS - Prevention - GET : suspicious 'embed' tag found in URL
3.2.0
XSS - Prevention - GET : suspicious 'object' tag found in URL
3.2.0
XSS - Phishing : suspicious 'form' tag found in URL
3.2.0
XSS - Prevention - POST : suspicious 'embed' tag found in data
3.2.0
XSS - Prevention - POST : suspicious 'style' tag found in data
3.2.0
XSS - Prevention - GET : javascript code found in URL
3.2.0
XSS - Prevention - POST : suspicious 'div' tag found in data
3.2.0
XSS - Prevention - GET : evasion attempt using tag characters encoding in URL
3.2.0
XSS - Prevention - GET : suspicious 'style' tag found in URL
3.2.0
XSS - Phishing : suspicious 'link' tag found in URL
3.2.0
XSS - Prevention - GET : 'script' tag found in URL
3.2.0
XSS - Prevention - POST : 'script' tag found in data
3.2.0
XSS - Prevention - POST : suspicious 'style' attribute found in data
3.2.0
XSS - Prevention - GET : 'location' javascript object found in URL
3.2.0
XSS - Prevention - GET : suspicious 'div' tag found in URL
3.2.0
     


 
 
 
 
 Risk level 
Moderate 

 Vulnerability First Public Report Date 
2008-10-30 

 Target Type 
Client 

 Possible exploit 
Local & Remote