I'll analyze both binaries to identify the vulnerability patch. Let me start by opening both files in Ghidra and comparing them.

Function ghidra_open_server called with arguments: {"filepath": "/sandbox/bash_old"}

[
  {
    "type": "text",
    "text": "Success"
  }
]

Function ghidra_open_server called with arguments: {"filepath": "/sandbox/bash_new"}

[
  {
    "type": "text",
    "text": "Success"
  }
]