Bypassing of web filters by using ASCII

Thursday, 22 June 2006, 12:45 AM EST

Of the tested browsers Firefox 1.5, Opera 8.5 and InternetExplorer 6, only the InternetExplorer does this correctly, the others evaluate the bit and display the characters as if they were from the character set ISO-8859-1. Although the behaviour of the InternetExplorer is the correct one, this creates a security risk: the author of a web page can set the bit on arbitraty characters without changing the look of the page. But virus scanners and content filters see completely different characters, so that there programs cannot detect viruses or spam.

At iKu.

[ Read more ]




Spotlight

Fake "Online Ebola Alert Tool" delivers Trojan

Posted on 29 October 2014.  |  Cyber scammers continue to take advantage of the fear and apprehension surrounding the proliferation of the Ebola virus.


Weekly newsletter

Reading our newsletter every Monday will keep you up-to-date with security news.
  



Daily digest

Receive a daily digest of the latest security news.
  

DON'T
MISS

Thu, Oct 30th
    COPYRIGHT 1998-2014 BY HELP NET SECURITY.   // READ OUR PRIVACY POLICY // ABOUT US // ADVERTISE //