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Prado TJavaScript::encode() script injection vulnerability
From: gabor.berczi () devworx hu
Date: Thu, 22 Mar 2012 12:25:29 GMT

Prado TJavaScript::encode() script injection vulnerability

Vulnerability severity                  : medium
Vulnerability type                      : cross-site script injection attack
                                          cookie theft
                                          session hijacking
                                          stealing of sensitive information
Remotely exploitable                    : yes

Vulnerability discovery date            : 2012/03/07
Vulnerability discovered by             : Gabor Berczi <gabor.berczi () devworx hu>

Proof of concept exploit created        : 2012/03/11
Proof of concept exploit developed by   : Gabor Berczi <gabor.berczi () devworx hu>

Fix created                             : 2012/03/07
Fix developed by                        : Gabor Berczi <gabor.berczi () devworx hu>

Vulnerability reported to vendor        : 2011/03/07

Affected products                       : PRADO (PHP Framework) 3.x


The vulnerability allows injection of arbitrary JavaScript snippets into some of the 
standard controls built into PRADO, if the latter try to display or use string type 
information that begins with user-supplied data fragments. This can be used by a remote
attacker to hijack a victim's session and steal sensitive information.

The vulnerability exists because the affected standard controls do not escape user-supplied
textual information properly when rendering the JavaScript code for their client-side wrappers, 
and because the PRADO Framework provides currently no way for the application or component 
developers to supply textual information to said controls in an XSS-safe way. The latter also
means that several 3rd party components or application might be also affected by the issue,
even if they don't use any of the vulnerable standard controls, but pass information the same
way to the client-side as the former do.

A fix has been already provided for the vulnerability, alongside with a PoC exploit.


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