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session:08 [2018/07/03 20:12]
Razvan Deaconescu [15. Tutorial: Shellcode on Stack] 		session:08 [2020/07/19 12:49] (current)
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-====== 0x08. Shellcodes (advanced) ======+====== 0x07. Shellcodes 2 (advanced) ======
  
 ===== Resources ===== ===== Resources =====
  
-[[http://security.cs.pub.ro/summer-school/res/arc/08-shellcodes-advanced-skel.zip|Activities archive]]+/*[[http://security.cs.pub.ro/summer-school/res/arc/08-shellcodes-advanced-skel.zip|Activities archive]]*/ 
 + 
 +[[https://github.com/hexcellents/sss-exploit|Activities repo]]
  
 [[http://shell-storm.org/shellcode/|Shellcode repository]] [[http://shell-storm.org/shellcode/|Shellcode repository]]
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 ===== 4. Challenge: Shellcode as Argument ===== ===== 4. Challenge: Shellcode as Argument =====
  
-Go to ''02-challenge-shellcode-argv/'' in the [[http://security.cs.pub.ro/summer-school/res/arc/08-shellcodes-advanced-skel.zip|activities archive]].+Go to ''04-challenge-shellcode-argv/'' in the [[http://security.cs.pub.ro/summer-school/res/arc/08-shellcodes-advanced-skel.zip|activities archive]].
  
 Feed the ''vuln'' executable a proper ''x86_64'' shellcode as a program argument. Make sure it works by running it by itself and then run it under ''strace''. Feed the ''vuln'' executable a proper ''x86_64'' shellcode as a program argument. Make sure it works by running it by itself and then run it under ''strace''.
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 In the ''sol/exploit.py'' script, we fill the ''approximate_buffer_address'' variable with the address from GDB and then we run along that. We run the program multiple times, until we find the proper address that is able to get us the shellcode to run. In the ''sol/exploit.py'' script, we fill the ''approximate_buffer_address'' variable with the address from GDB and then we run along that. We run the program multiple times, until we find the proper address that is able to get us the shellcode to run.
- 
-<note important> 
-This didn't work for us. It may be because of x86_64 varying the addresses even in the absence of ASLR. 
-</note> 
  
 <note important> <note important>
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 </note> </note>
  
 +===== 17. Challenge: Shellcode on Stack =====
 +
 +Go to the ''17-challenge-shellcode-on-stack/'' folder in the [[http://security.cs.pub.ro/summer-school/res/arc/08-shellcodes-advanced-skel.zip|activities archive]].
 +
 +Update the ''sol/exploit.py'' script that exploits the ''vuln'' executable. It's similar to challenge 15.
 +
 +===== 18. Challenge: Shellcode on Stack (32 bit) =====
 +
 +Go to the ''18-challenge-shellcode-on-stack-32/'' folder in the [[http://security.cs.pub.ro/summer-school/res/arc/08-shellcodes-advanced-skel.zip|activities archive]].
 +
 +It's similar to the challenge above, except that it runs on 32 bits. Copy and update the ''exploit.py'' script from the solution above and update it to make it work on 32 bits.
  
 /* /*
session/08.1530637943.txt.gz · Last modified: 2018/07/03 20:12 by Razvan Deaconescu

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