CVE-2023-22787
📋 TL;DR
An unauthenticated Denial of Service vulnerability in Aruba's PAPI protocol allows attackers to disrupt affected access points without credentials. This affects Aruba InstantOS and ArubaOS 10 systems, potentially causing network outages for wireless users.
💻 Affected Systems
- Aruba InstantOS
- ArubaOS 10
📦 What is this software?
Arubaos by Arubanetworks
⚠️ Risk & Real-World Impact
Worst Case
Complete disruption of wireless services across multiple access points, causing extended network downtime and business interruption.
Likely Case
Temporary service interruption affecting wireless connectivity for users connected to vulnerable access points.
If Mitigated
Minimal impact with proper network segmentation and access controls limiting PAPI protocol exposure.
🎯 Exploit Status
Unauthenticated access and DoS nature suggest relatively straightforward exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched versions
Vendor Advisory: https://www.arubanetworks.com/assets/alert/ARUBA-PSA-2023-006.txt
Restart Required: Yes
Instructions:
1. Review ARUBA-PSA-2023-006.txt advisory 2. Download appropriate firmware updates from Aruba support portal 3. Apply updates to affected access points 4. Reboot devices as required
🔧 Temporary Workarounds
Network Segmentation
allRestrict access to PAPI protocol ports from untrusted networks
Access Control Lists
allImplement ACLs to limit which IP addresses can communicate with PAPI services
🧯 If You Can't Patch
- Implement strict network segmentation to isolate vulnerable systems
- Deploy intrusion prevention systems to detect and block PAPI-based DoS attempts
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against vendor advisory; test if PAPI service responds to unauthenticated requestsCheck Version:
show version (on Aruba devices)Verify Fix Applied:
Verify firmware version is updated to patched version; test that PAPI service no longer allows unauthenticated DoS📡 Detection & Monitoring
Log Indicators:
- Unusual PAPI protocol traffic patterns
- Access point service disruption logs
- Multiple failed service restart attempts
Network Indicators:
- Abnormal PAPI protocol traffic spikes
- UDP traffic to PAPI ports from unexpected sources
SIEM Query:
source_port:8211 OR dest_port:8211 AND (bytes > threshold OR packet_count > threshold)