[How to]Fix Sin/Ranger Exploit

[JohnHeatz]

Hi everyone; I know I have posted a file with this already fixed here:



But I feel like giving the information as of how to do it yourself; this just for the ones wanting to know, as most of the server owners know how to do this, or have gotten files with it already fixed; yet, having the information is never bad, at least, I believe.

So let's start.

Once again, you will need a and some back-ups of your ps_game.exe.

The fix is quite easy, all you have to do is look for the following strings:

• 0F B6 84 3E 9D 01 00 00 8B 4B 30 0F B7 54 41 52 01 97 D8 12 00 00
• 0F B6 97 A2 01 00 00 8B 46 30 0F B7 4C 50 52 29 8F D8 12 00 00 0F
• 0F B7 D1 01 97 D8 12 00 00 EB 09 0F B7 C9 01 8F FC 12 00 00 83 C0
• 0F B7 D0 29 97 D8 12 00 00 EB 3F 0F B7 C0 29 87 FC 12 00 00 8B 87
• 0F B7 51 52 29 90 D8 12 00 00 0F B7 51 58 29 90 DC 12 00 00 0F B7
• 0F B7 51 52 01 90 D8 12 00 00 0F B7 51 58 01 90 DC 12 00 00 0F B7
• 0F B6 94 3B 9D 01 00 00 8B 46 30 0F B7 4C 50 5E 29 8F E0 12 00 00
• 0F B6 D0 8B 43 30 0F B7 4C 50 5E 01 8F E0 12 00 00 0F B6 94 3E 9D

Now, before these strings you will find the values 70 [XX], with XX being two characters forming some Hexadecimal value (they can be different from one line to another, so don't worry about it), for example, the first line would be:

70 [XX] 0F B6 84 3E 9D 01 00 00 8B 4B 30 0F B7 54 41 52 01 97 D8 12 00

Now, to fix the exploit, all you have to do is change the 70 [XX] to 90 90, so after doing the change on the first line, it will end up being like this:

[COLOR="Red"][B]90 90[/B][/COLOR] 0F B6 84 3E 9D 01 00 00 8B 4B 30 0F B7 54 41 52 01 97 D8 12 00

Just remember, these lines are separate one from another, so, while searching, you must do it one-by-one.

[Aveline]

i always wonder how do ppl analyze this kinda stuff and find the right codes o.o

[JohnHeatz]

Well, most of the work for this was done by a retired member under the name of [GM]Father, based on his work is that most fixes are done, as well as LPH's work.

[thetruestarr1337]

Thank you John.
And BTW, nice new Signature

[..Zeus..]

1. Very Nice thank you

[jhoonyboy]

please, can not I apply their corrections JohnHeatz, this ps-game.exe is episode 3 could help me fix the bug ranger?
ps_game.exe

[JohnHeatz]

Currently I don't have my computer, and will not have it until next Friday (probably) so I can't really check on it right now, if no one has helped with it by the time I get my computer back, I'll give it a shot

[jhoonyboy]

waiting....

[jhoonyboy]

Originally Posted by JohnHeatz

Currently I don't have my computer, and will not have it until next Friday (probably) so I can't really check on it right now, if no one has helped with it by the time I get my computer back, I'll give it a shot

please JohnHeatz, I'm still trying a solution, but I had no success maybe you can help me?

[JohnHeatz]

I'm sorry I forgot about this, plus I've stopped any and every development for Shaiya for the time being, maybe some of those "super developers" get to help you...yet known some of them would probably simply charge you for the work, hopefully one of the real developers get to help you for free

[castor4878]

does the file loaded at is actually working??

at first view, it seems that it was patched but bytes '00 00' were used instead of '90 90'.
'90' is the opcode for 'NOP' (no operations) '00' is ADD r/m8,r8

if you have a backup of a 100% clean ps_game, compare it with this one, if they differ, use the right opcode (90) to fix the bug.
if they are identical, the instructions to clear (the 70 xx which means "Jump by xx bytes If Overflow") is not applicable due to the actual coding (may be the test is before, of after or in a diffrent part of the worflow or simply doesn't exist -- and the right answer can not be guess w/o analysis of significant part of the code); in this case, if the bug must be fixed, I would suggest you to use a episo 4+ ps_game.exe (u may have to upgrade the skills table (and npcskill.sdata) but nothing hard, nothing unknown).