CVE-2023-22757
📋 TL;DR
This CVE describes buffer overflow vulnerabilities in Aruba networking devices that allow unauthenticated attackers to execute arbitrary code with privileged permissions via specially crafted PAPI protocol packets. It affects ArubaOS and Aruba InstantOS devices, potentially compromising network infrastructure.
💻 Affected Systems
- Aruba Mobility Controllers
- Aruba Gateways
- Aruba Mobility Conductors
- Aruba Instant APs
📦 What is this software?
Arubaos by Arubanetworks
Arubaos by Arubanetworks
Arubaos by Arubanetworks
Sd Wan by Arubanetworks
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise leading to network takeover, data exfiltration, and lateral movement to other systems.
Likely Case
Device compromise enabling network traffic interception, credential harvesting, and persistence establishment.
If Mitigated
Limited impact if devices are behind firewalls with strict PAPI protocol filtering and network segmentation.
🎯 Exploit Status
The vulnerability requires sending specially crafted packets to the PAPI port (8211/UDP typically).
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: ArubaOS 8.10.0.8, 10.5.1.0; Aruba InstantOS 6.5.4.23, 8.11.2.0
Vendor Advisory: https://www.arubanetworks.com/assets/alert/ARUBA-PSA-2023-002.txt
Restart Required: Yes
Instructions:
1. Download appropriate firmware from Aruba Support Portal. 2. Backup device configuration. 3. Apply firmware update via CLI or web interface. 4. Reboot device. 5. Verify version with 'show version' command.
🔧 Temporary Workarounds
Block PAPI Protocol
allBlock UDP port 8211 (default PAPI port) at network perimeter and between network segments.
iptables -A INPUT -p udp --dport 8211 -j DROP
netsh advfirewall firewall add rule name="Block PAPI" dir=in action=block protocol=UDP localport=8211
Disable PAPI Protocol
linuxDisable PAPI protocol on Aruba devices if not required for management.
no papi controller enable
no papi controller port
🧯 If You Can't Patch
- Segment affected devices in isolated VLANs with strict firewall rules
- Implement network monitoring for suspicious PAPI traffic on port 8211/UDP
🔍 How to Verify
Check if Vulnerable:
Check device version with 'show version' command and compare against vulnerable versions listed in advisory.Check Version:
show versionVerify Fix Applied:
Verify version is patched with 'show version' command and test PAPI connectivity is properly restricted.📡 Detection & Monitoring
Log Indicators:
- Unusual PAPI protocol activity
- Device reboot events
- Privileged command execution
Network Indicators:
- Unexpected UDP traffic on port 8211
- PAPI protocol packets with unusual patterns
SIEM Query:
source_port=8211 OR dest_port=8211 AND protocol=UDP AND (payload_size>normal OR pattern_matching)