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How do we crash systems, browsers, or otherwise bring things to a halt, and how do we protect those things? 
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Opera and ports
Posted by: Kyran
Date: November 29, 2006 08:40PM

Opera seems to die if you send a request to a server that doesn't accept connections on a specific port. If a webserver/proxy/etc runs on port 8080, Opera will work fine since it accepts it. But say you use port 21, or in this case 22. http://jeremiahgrossman.blogspot.com:22/ Opera suddenly takes near 100% CPU. Any ideas why? I haven't done much testing like if the rest of the page loads or not, but it's interesting.

- Kyran

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Re: Opera and ports
Posted by: Kyran
Date: November 29, 2006 08:47PM

<iframe src="http://jeremiahgrossman.blogspot.com:22/"></iframe>
<script>alert('Die!');</script>
<meta http-equiv="refresh" content="0">

That pretty much destroys Opera unless the user is smart enough to turn off javascript from the alert box. Even then, if the iframe is hidden it could take awhile to find the source of the problem. Especially if they have saved sessions that Opera uses as default.

- Kyran

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Re: Opera and ports
Posted by: id
Date: November 29, 2006 08:52PM

On freebsd it took up 13% of the cpu for about 30 seconds.

Version
9.02
Build
434
Platform
FreeBSD
System
i386, 6.2-PRERELEASE
Qt library
3.3.5
Java
No Java Runtime Environment installed

-id

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Re: Opera and ports
Posted by: id
Date: November 29, 2006 08:56PM

I take that back, with nothing else running it might, I had other high priority things going on at the time. Seems to take up 40% and just sits there now.

-id

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Re: Opera and ports
Posted by: Kyran
Date: November 29, 2006 09:05PM

Version
9.02
Build
8585
Platform
Win32
System
Windows XP
Java
Sun Java Runtime Environment version 1.5


Java is never enabled unless a site needs it specially.

- Kyran

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Re: Opera and ports
Posted by: rsnake
Date: November 29, 2006 09:20PM

Interesting. It spiked to 100% for me sustained as well. But it never became unresponsive. Very odd.

- RSnake
Gotta love it. http://ha.ckers.org

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Re: Opera and ports
Posted by: maluc
Date: November 29, 2006 09:28PM

45% for me.. but if i right click on the page.. or click one of the browser menus (File,View,Tools,etc) it pauses down to 8% .. then back up to 45 if i un-right click

weird. and multiple iframes of different links doesn't seem to make it worse. and what's weirder, multiple tabs of operacrash.html seems to lowwwer the CPU percentage. which doesn't even make sense .-.

-maluc

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Re: Opera and ports
Posted by: Kyran
Date: November 29, 2006 09:31PM

Hmm. The first time I did this, everything ELSE became slow/unresponsive but Opera stayed normal. Now everything works fine. I'll try doing something a tad more cpu intensive while testing.

- Kyran

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Re: Opera and ports
Posted by: hackathology
Date: March 28, 2007 07:19AM

hmz mine spiked about 13%. Have anyone tried on Epiphany?

http://hackathology.blogspot.com

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Re: Opera and ports
Posted by: Kyran
Date: June 06, 2007 12:52AM

It was fixed in the last version apparently for Opera.
What is Epiphany?

- Kyran

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Re: Opera and ports
Posted by: id
Date: June 06, 2007 01:09AM

Gnome browser
http://www.gnome.org/projects/epiphany/

-id

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