Brother MFC Administration Reflected Cross-Site Scripting

[vulns@xxxxxxxxxxx]

Class   Cross-Site Scripting
Remote  Yes
Disclosed       9th October 2014
Published       7th January 2015
Credit  Dave Daly of Dionach (vulns@xxxxxxxxxxx)
Confirmed Vulnerable    Brother MFC-J4410DW with F/W Versions J and K

The printer administration web application on Brother MFC-J4410DW model 
printers with firmware versions older than version L (released 18th December 
2014) are susceptible to a reflected cross-site scripting (XSS) vulnerability 
due to inadequately sanitised user input. An attacker may leverage this issue 
to run JavaScript in the context of a victim's browser.

F/W Versions J and K have been confirmed as vulnerable. Other versions may also 
be vulnerable.

The vulnerability affects all pages which accept the "url" querystring 
parameter. The following proof-of-concept example demonstrates this, using the 
"status" web page.

http://[printer]/general/status.html?url="/><script>alert("XSS!")</script><input
 type="hidden" value="

The vendor was notified of this issue in October 2014, and has reported that 
the vulnerability is addressed in the latest firmware version.