Re: Importance of browser security (was: On Mozilla-* updates)

2005-08-03 Thread Jan Luehr
Greetings,

Am Dienstag, 2. August 2005 10:57 schrieb Ben Bucksch:
> Stefano Salvi wrote:
> > I prefer to have no X on the server and administer it from command
> > line or Web interfaces (command line is better).
>
> Let's say
>
>1. You use Mozilla from sarge
>2. Somebody cracks you through known holes in that old Mozilla,
>   either a mass exploit or an enemy of you specifically targetting
>   you. Which is probably the easiest way to attack you, through all
>   firewalls. So much for browser/email security.
>3. He controls your desktop
>4. He downloads all your local mail and photos/images, including your
>   confidental company mail, private mail and nude photos of your
>   girlfriend. He posts it on the Internet, your company's billboard,
>   and your supermarket's billboard.

Eh - no.
Linux allows you to start two different XServers on two different screens (or 
on the same) with two different user-id's on two virtually or physically 
seperated Systems. As you can see, only fools make this mistake.

>5. He also installs a keyboard sniffer and downloads your private SSH
>   keys.

Rubbish - if seperated correctly.

>6. He logs into all servers and other computers that you have access
>   to. Including those desktops of your friends, which you remote
>   administrate or use the password that they use for your server.
>   And the attacker goes on from there. So much for desktop/server
>   security.

You  are describing the general results of trojan attacks - but to be honest - 
if it's getting personal, there are other ways to comprise machines. I've 
done some test: Who on my instant messaging list will execute a signed 
Java-Applet without asking me for further information.
No one asked my what this applet was doing. Everyone got his c:\test.txt 
saying "This was foolish" (Or /home/usr/C:\test.txt).
Verify yourself.

But in order to make this a server issue, you have to be foolish.

Keep smiling
yanosz


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Importance of browser security (was: On Mozilla-* updates)

2005-08-02 Thread Ben Bucksch

Stefano Salvi wrote:

I prefer to have no X on the server and administer it from command 
line or Web interfaces (command line is better).


Let's say

  1. You use Mozilla from sarge
  2. Somebody cracks you through known holes in that old Mozilla,
 either a mass exploit or an enemy of you specifically targetting
 you. Which is probably the easiest way to attack you, through all
 firewalls. So much for browser/email security.
  3. He controls your desktop
  4. He downloads all your local mail and photos/images, including your
 confidental company mail, private mail and nude photos of your
 girlfriend. He posts it on the Internet, your company's billboard,
 and your supermarket's billboard.
  5. He also installs a keyboard sniffer and downloads your private SSH
 keys.
  6. He logs into all servers and other computers that you have access
 to. Including those desktops of your friends, which you remote
 administrate or use the password that they use for your server.
 And the attacker goes on from there. So much for desktop/server
 security.
  7. One of your friends did things which are strictly legal, but your
 boss didn't like it at all, and fired him. Another one happened to
 be a dissident and gets in jail or maybe shot. So much for
 efficiency (this has nothing to do with efficiency).
  8. Because all this costs some time, the attacker needs to live, too.
 He drafts your bank accounts and those of your friends as a fair
 compensation. The Half Life 2 source code got indeed stolen via
 desktop compromitation, too. But all that is insignificant in
 comparison to your dead friend.

That's what's at stake here.

I don't care, if a Mozilla security update breaks some badly written 
extensions. And if it breaks Galeon's print function, so be it, you can 
still use Mozilla in this rare case. But there's *no* recovery from a 
bad breakin.



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