CVE-2024-33511 Overview
CVE-2024-33511 is a buffer overflow vulnerability in the Automatic Reporting service of Aruba Networks access point management infrastructure. The vulnerability allows unauthenticated remote code execution by sending specially crafted packets to the PAPI (Aruba's access point management protocol) UDP port 8211. Successful exploitation enables attackers to execute arbitrary code as a privileged user on the underlying operating system, potentially leading to complete system compromise.
Critical Impact
Unauthenticated remote code execution with privileged system access via network-accessible PAPI UDP port 8211
Affected Products
- Aruba Networks Access Point Management Systems
- Systems running the Automatic Reporting service with PAPI protocol enabled
- Network infrastructure with UDP port 8211 exposed
Discovery Timeline
- May 1, 2024 - CVE-2024-33511 published to NVD
- November 21, 2024 - Last updated in NVD database
Technical Details for CVE-2024-33511
Vulnerability Analysis
This vulnerability is classified as CWE-121 (Stack-based Buffer Overflow), a memory corruption flaw that occurs when data written to a buffer on the stack exceeds its allocated size. In this case, the Automatic Reporting service fails to properly validate the length of input data received via the PAPI protocol on UDP port 8211.
The attack requires no authentication and can be executed remotely over the network. The vulnerability affects the confidentiality, integrity, and availability of the target system, as successful exploitation grants the attacker arbitrary code execution with elevated privileges on the underlying operating system.
Root Cause
The root cause is insufficient bounds checking in the Automatic Reporting service when processing incoming PAPI protocol packets. When the service receives specially crafted UDP packets on port 8211, it copies user-controlled data into a fixed-size stack buffer without properly validating the input length. This allows an attacker to overflow the buffer and overwrite adjacent memory, including the function return address, enabling control flow hijacking.
Attack Vector
The attack is network-based and targets UDP port 8211, which hosts the PAPI (Aruba's access point management protocol) service. An attacker sends maliciously crafted UDP packets containing oversized data payloads to the Automatic Reporting service. The service processes these packets without adequate length validation, causing a stack-based buffer overflow.
The exploitation flow involves:
- Identifying an exposed PAPI service on UDP port 8211
- Crafting malicious UDP packets with overflow payload
- Sending packets to trigger the buffer overflow
- Overwriting the return address to redirect execution
- Executing arbitrary code with privileged user permissions
Detection Methods for CVE-2024-33511
Indicators of Compromise
- Unusual network traffic patterns targeting UDP port 8211
- Unexpected process spawning from the Automatic Reporting service
- Anomalous memory usage or crashes in PAPI-related processes
- Unauthorized privileged process execution on affected systems
Detection Strategies
- Deploy network intrusion detection rules monitoring for malformed PAPI protocol packets on UDP port 8211
- Implement deep packet inspection for oversized or anomalous UDP payloads to port 8211
- Monitor system logs for crashes or segmentation faults in the Automatic Reporting service
- Configure endpoint detection to alert on unexpected child processes spawned by network services
Monitoring Recommendations
- Enable verbose logging for the Automatic Reporting service and PAPI protocol handlers
- Implement network flow analysis to detect reconnaissance scanning of UDP port 8211
- Deploy file integrity monitoring on critical system binaries that could be modified post-exploitation
- Correlate authentication logs with network activity to identify unauthorized access attempts
How to Mitigate CVE-2024-33511
Immediate Actions Required
- Apply the security patch from Aruba Networks immediately as referenced in ARUBA-PSA-2024-004
- Block or restrict access to UDP port 8211 from untrusted networks using firewall rules
- Segment network infrastructure to limit exposure of PAPI management interfaces
- Monitor affected systems for signs of compromise during the patching window
Patch Information
Aruba Networks has released a security advisory addressing this vulnerability. Administrators should consult the Aruba Networks Security Alert ARUBA-PSA-2024-004 for specific patch versions and upgrade instructions. Apply the recommended firmware updates to all affected access point management systems as soon as possible.
Workarounds
- Implement strict firewall rules to block external access to UDP port 8211
- Use network segmentation to isolate PAPI management traffic to trusted administrator networks only
- Deploy a VPN or jump host architecture for remote management access
- Consider disabling the Automatic Reporting service if not required for operations until patches can be applied
# Example firewall rule to restrict PAPI UDP port access
# Block external access to UDP port 8211 (PAPI protocol)
iptables -A INPUT -p udp --dport 8211 -s ! 10.0.0.0/8 -j DROP
# Allow only from trusted management network
iptables -A INPUT -p udp --dport 8211 -s 10.10.10.0/24 -j ACCEPT
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
