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htmltitle.txt

htmltitle.txt
Posted Jan 2, 2005
Authored by Bipin Gautam

There is a weird denial of service issue with Internet Explorer and Mozilla Firefox when they attempt to render html files with long titles.

tags | advisory, denial of service
MD5 | 3357dc5d3a06a4e2bac7976e80e693c9

htmltitle.txt

Change Mirror Download
There is an issue with these browser rendering html's
with long titles.
Only Tested on:
--------------
Internet Explorer(SP2): 6.0.2900.2180
Mozilla firefox: 1.0

Not affected:
-------------
Mozilla Browser

Have a look at,
___________________
<html>
<head> <title> ....(put)3.5 MB OF data.......

</html>
___________________


For IE beyond 1 Mb will just do fine. On execution,
Mozilla Firefox starts filling up all the available
system memory with 100% CPU use.

Internet explorer renders 100% CPU use, but no system
instability. (O;
I've tested it on Windows XP SP2.

Both Firefox & IE supports decompression method 'gzip'
ie. an extended request header named
HTTP_ACCEPT_ENCODING like
HTTP_ACCEPT_ENCODING=gzip,deflate

By this way, the file can be kept around few kilobytes
in the server and delivered easily. I wonder, why
such... simple issue went un-noticed to everyone for
years...



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