CVE-2020-24634
📋 TL;DR
CVE-2020-24634 is a critical command injection vulnerability in Aruba networking devices that allows remote attackers to execute arbitrary commands by sending specially crafted packets to the PAPI UDP port (8211). This affects Aruba 9000 Gateway, 7000 Series Mobility Controllers, and 7200 Series Mobility Controllers running vulnerable firmware versions. Attackers can exploit this without authentication to gain control of affected devices.
💻 Affected Systems
- Aruba 9000 Gateway
- Aruba 7000 Series Mobility Controllers
- Aruba 7200 Series Mobility Controllers
📦 What is this software?
Arubaos by Arubanetworks
Arubaos by Arubanetworks
Arubaos by Arubanetworks
Arubaos by Arubanetworks
Arubaos by Arubanetworks
Sd Wan by Arubanetworks
Sd Wan by Arubanetworks
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of affected networking devices, allowing attackers to pivot to internal networks, intercept traffic, deploy malware, or disrupt network operations.
Likely Case
Remote code execution leading to device takeover, network reconnaissance, and potential lateral movement within the organization's infrastructure.
If Mitigated
Limited impact if devices are patched, network segmentation is in place, and PAPI port access is restricted.
🎯 Exploit Status
Exploitation requires sending specially crafted UDP packets to port 8211. Multiple public proof-of-concept exploits exist.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: ArubaOS 8.7.1.0 and later, 8.6.0.6 and later, 8.5.0.11 and later, 8.3.0.14 and later, 6.5.4.18 and later, 6.4.4.24 and later
Vendor Advisory: https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbnw04072en_us
Restart Required: Yes
Instructions:
1. Download appropriate firmware update from Aruba support portal. 2. Backup current configuration. 3. Apply firmware update following Aruba's upgrade procedures. 4. Reboot device. 5. Verify new firmware version is running.
🔧 Temporary Workarounds
Block PAPI UDP Port
allBlock access to UDP port 8211 at network perimeter and internally using firewall rules.
# Example iptables rule: iptables -A INPUT -p udp --dport 8211 -j DROP
# Example Windows Firewall: New-NetFirewallRule -DisplayName "Block Aruba PAPI" -Direction Inbound -Protocol UDP -LocalPort 8211 -Action Block
Network Segmentation
allIsolate Aruba controllers and access points in separate VLANs with strict access controls.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected devices
- Deploy intrusion detection/prevention systems to monitor for PAPI exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check firmware version on Aruba devices via web interface or CLI: show versionCheck Version:
show versionVerify Fix Applied:
Verify firmware version is patched: show version | include Version📡 Detection & Monitoring
Log Indicators:
- Unusual PAPI protocol activity
- Failed authentication attempts on PAPI port
- Unexpected configuration changes
Network Indicators:
- UDP traffic to port 8211 with unusual payload patterns
- Multiple connection attempts to PAPI port from single source
SIEM Query:
source_port=8211 OR dest_port=8211 AND protocol=UDP AND (payload_size>1000 OR payload_contains="cmd" OR payload_contains="/bin")