CVE-2023-31289
📋 TL;DR
Pexip Infinity before version 31.2 has improper input validation in signaling components, allowing remote attackers to trigger an abort condition. This affects all Pexip Infinity deployments running vulnerable versions, potentially disrupting video conferencing services.
💻 Affected Systems
- Pexip Infinity
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote unauthenticated attacker causes service disruption or denial of service, impacting critical video conferencing operations.
Likely Case
Service interruption leading to dropped calls and degraded conferencing capabilities.
If Mitigated
Minimal impact with proper network segmentation and updated systems.
🎯 Exploit Status
Improper input validation typically allows straightforward exploitation via crafted signaling packets.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 31.2 or later
Vendor Advisory: https://docs.pexip.com/admin/security_bulletins.htm
Restart Required: Yes
Instructions:
1. Backup current configuration. 2. Download Pexip Infinity version 31.2 or later from Pexip support portal. 3. Apply update via management interface. 4. Restart services as prompted.
🔧 Temporary Workarounds
Network segmentation
allRestrict access to signaling ports to trusted networks only
Rate limiting
allImplement rate limiting on signaling traffic to reduce impact
🧯 If You Can't Patch
- Implement strict network ACLs to limit signaling traffic to trusted sources only
- Deploy intrusion prevention systems to detect and block malformed signaling packets
🔍 How to Verify
Check if Vulnerable:
Check Pexip Infinity version via management interface or SSH: show system versionCheck Version:
show system versionVerify Fix Applied:
Confirm version is 31.2 or higher and check system logs for stability📡 Detection & Monitoring
Log Indicators:
- Unexpected service restarts
- Abnormal signaling errors
- Connection resets
Network Indicators:
- Unusual signaling packet patterns
- Spike in malformed SIP/H.323 packets
SIEM Query:
source="pexip" AND (event="service_restart" OR event="signaling_error")