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A history on security and how to win the battle
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Joshua Thijssen
August 19, 2012
Technology
2
79
A history on security and how to win the battle
Joshua Thijssen
August 19, 2012
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Transcript
A history on security and how to win the battle...
Joshua Thijssen
Channeling and restricting flow
Sometimes channels don’t listen
Failure is always an option
Security is a business value
Security is a business value
Security is a business value
Let others take care of security
Let others take care of security
History of (computer) security
Security in the “old days”
I wasn’t kidding when I said: “old days”
5.25” high density disks
5.25” high density disks
Copying was a breeze
Copy protection
Copy protection
Let’s try dongles
NOPE!
8086 segmented memory layout
8086 segmented memory layout segment reg. 16-bit
8086 segmented memory layout segment reg. offset reg. 16-bit 16-bit
8086 segmented memory layout segment reg. offset reg. physical address
16-bit 16-bit 20-bit
8086 segmented memory layout segment reg. offset reg. << 4
physical address 16-bit 16-bit 20-bit
8086 segmented memory layout segment reg. offset reg. << 4
+ physical address 16-bit 16-bit 20-bit
07C0:0050 07C00 0050+ 07C50 8086 segmented memory layout segment reg.
offset reg. << 4 + physical address 16-bit 16-bit 20-bit
07C0:0050 07C00 0050+ 07C50 0000:7C50 00000 07C50+ 07C50 8086 segmented
memory layout segment reg. offset reg. << 4 + physical address 16-bit 16-bit 20-bit
07C0:0050 07C00 0050+ 07C50 0000:7C50 00000 07C50+ 07C50 007C:7490 007C0
07490+ 07C50 8086 segmented memory layout segment reg. offset reg. << 4 + physical address 16-bit 16-bit 20-bit
8086 segmented memory layout segment reg. offset reg. << 4
+ physical address 16-bit 16-bit 20-bit
386 protected memory layout + descriptor directory entry page table
entry physical address directory page offset cr3 gdt / ldt page directory page table page frame linear address descriptor table selector offset 32-bit 16-bit
None
None
Ring 0 Kernel
Ring 0 Kernel Ring 1 Device drivers
Ring 0 Kernel Ring 1 Device drivers Ring 2 Device
Drivers
Ring 0 Kernel Ring 1 Device drivers Ring 2 Device
Drivers Ring 3 Applications
Security today
The weakest link
Humans
it is much easier to trick someone into giving a
password for a system than to spend the effort to crack into the system -- K. Mitnick
Raising awareness on browsers
It’s a trap!
We’re curious
People are resourceful
Weird hobby’s
Weird hobby’s
00710022211101015511130102359000000000
00710033308171115011231111700000000000
00710033308171115011231111700000000000 00710022211101015511130102359000000000
00710033308171115011231111700000000000 00710022211101015511130102359000000000
00710022211101015511130102359000000000 00710033308171115011231111700000000000
00710044401011200001231122359000000000
None
Magnetic card reader/writer: $ 250
Magnetic card reader/writer: $ 250 Parking costs per night: $40
Magnetic card reader/writer: $ 250 Parking costs per night: $40
Free parking: priceless
How can we cure this problem?
We need to implement REAL security, not fake.
How do we win the war? How do we win
the war?
If we as developers have to keep thinking about security,
we will lose...
We need to deflect *EVERY* attack, They only need *ONE*
to win...
99.999% of all programmers are NOT trained or have the
capability to identify security threats. The other 0.001% will not be able to identify them ALL OF THEM ALL THE TIME.
A day in the life of a PHP programmer...
$result = mysql_query('SELECT * FROM users WHERE username="'.$_GET['username'].'"');
You should use mysql_real_escape_string!
No, you shouldn’t!
You just put a developer who wasn’t aware of security
issues, in charge of security...
Let others handle security (PDO)
There is no (quick) solution.
There is no (quick) solution. but we have to change
the way we deal with security radically,
There is no (quick) solution. but we have to change
the way we deal with security radically, by not dealing with security...
Let others take care of security
Any questions (maximum 5)?
Find me on twitter: @jaytaph Find me for development and
training: www.noxlogic.nl Find me on email:
[email protected]
Find me for blogs: www.adayinthelifeof.nl Thank you! http://joind.in/6853