CVE-2026-42575 apko软件包完整性校验缺失漏洞

# PoC Concept: Demonstration of the missing checksum verification logic # This script simulates the vulnerable behavior in apko < 1.2.7 def verify_package_vulnerable(index_checksum, downloaded_package_hash): # Vulnerable logic: Parse values but do not compare print(f"[VULNERABLE] Index Checksum: {index_checksum}") print(f"[VULNERABLE] Downloaded Hash: {downloaded_package_hash}") # Missing: if index_checksum != downloaded_package_hash: raise Error print("[VULNERABLE] Package accepted without hash comparison!") return True def verify_package_patched(index_checksum, downloaded_package_hash): # Patched logic in v1.2.7 print(f"[PATCHED] Index Checksum: {index_checksum}") print(f"[PATCHED] Downloaded Hash: {downloaded_package_hash}") if index_checksum != downloaded_package_hash: print("[PATCHED] ERROR: Hash mismatch! Package rejected.") return False print("[PATCHED] Package verified successfully.") return True # Simulation if __name__ == "__main__": # Attacker modifies the package, changing the hash original_hash = "abc123" tampered_hash = "deadbeef" print("--- Simulating Attack ---") verify_package_vulnerable(original_hash, tampered_hash) print("") print("--- Simulating Patched Behavior ---") verify_package_patched(original_hash, tampered_hash)