CVE-2024-8456 Overview
CVE-2024-8456 is a critical authentication bypass vulnerability affecting certain PLANET Technology network switch models. The vulnerability exists due to missing authentication for critical functions (CWE-306) in the firmware upload and download functionality. This security flaw allows unauthenticated remote attackers to download and upload firmware and system configurations without any access control validation, ultimately enabling complete device takeover.
Critical Impact
Unauthenticated attackers can gain full control of affected PLANET Technology switches by exploiting missing access controls in firmware management functions, potentially compromising entire network segments.
Affected Products
- PLANET GS-4210-24P2S Firmware (Hardware version 3.0)
- PLANET GS-4210-24PL4C Firmware (Hardware version 2.0)
- PLANET GS-4210-24P2S Network Switch
- PLANET GS-4210-24PL4C Network Switch
Discovery Timeline
- 2024-09-30 - CVE-2024-8456 published to NVD
- 2024-10-04 - Last updated in NVD database
Technical Details for CVE-2024-8456
Vulnerability Analysis
This vulnerability represents a fundamental authentication bypass flaw in the affected PLANET Technology switch firmware. The firmware upload and download functionality lacks proper access control mechanisms, meaning the device fails to verify whether a user is authenticated or authorized before allowing critical operations. An attacker can exploit this to download the current firmware and configuration files, potentially extracting sensitive information such as network credentials, SNMP community strings, and administrative passwords. More critically, attackers can upload malicious or modified firmware, gaining persistent control over the device.
The network-based attack vector requires no user interaction and no prior authentication, making this vulnerability particularly dangerous for devices exposed to untrusted networks or the internet.
Root Cause
The root cause of CVE-2024-8456 is Missing Authentication for Critical Function (CWE-306). The affected PLANET Technology switches fail to implement proper authentication checks before allowing access to firmware management endpoints. The web interface or API responsible for handling firmware upload and download operations does not validate session tokens or credentials, allowing any network-accessible attacker to perform these privileged operations.
Attack Vector
The attack can be executed remotely over the network by any unauthenticated attacker who can reach the switch's management interface. The exploitation process involves:
- Identifying an exposed PLANET GS-4210-24P2S or GS-4210-24PL4C switch on the network
- Sending unauthenticated requests to the firmware download endpoint to extract current configuration and firmware
- Analyzing the downloaded configuration for credentials and network topology information
- Optionally uploading modified firmware with backdoors or malicious functionality
- Gaining persistent administrative access to the network device
The vulnerability allows both configuration extraction for reconnaissance and firmware manipulation for persistent compromise. Since network switches are critical infrastructure components, compromising these devices can enable network traffic interception, VLAN hopping, and lateral movement across network segments.
Detection Methods for CVE-2024-8456
Indicators of Compromise
- Unexpected firmware download requests to PLANET switch management interfaces without valid authentication sessions
- Unauthorized firmware upload activities or configuration changes on affected switches
- Unusual network traffic patterns to switch management ports (typically HTTP/HTTPS on standard web ports)
- Configuration file changes or firmware version modifications without authorized administrative action
- Log entries showing firmware management operations without corresponding authentication events
Detection Strategies
- Monitor network traffic for unauthenticated HTTP/HTTPS requests targeting firmware management endpoints on PLANET switches
- Implement network segmentation monitoring to detect unauthorized access attempts to management interfaces
- Deploy intrusion detection rules to identify firmware download/upload patterns without proper authentication headers
- Establish baseline firmware versions and configuration hashes to detect unauthorized modifications
- Configure SIEM alerts for any firmware management activity on affected device models
Monitoring Recommendations
- Implement continuous monitoring of switch management interface access logs for anomalous patterns
- Deploy network-based anomaly detection on management VLANs to identify unauthorized access attempts
- Establish firmware integrity monitoring with regular hash verification against known-good baselines
- Monitor for configuration drift using automated compliance tools
- Enable logging of all administrative actions and forward to centralized SIEM for correlation
How to Mitigate CVE-2024-8456
Immediate Actions Required
- Isolate affected PLANET GS-4210-24P2S and GS-4210-24PL4C switches from untrusted networks immediately
- Implement network access control lists (ACLs) to restrict management interface access to authorized administrative hosts only
- Deploy firewall rules blocking external access to switch management interfaces
- Audit current firmware versions and configurations on all affected devices for signs of tampering
- Contact PLANET Technology support for firmware update availability and patching guidance
Patch Information
Organizations should consult the TW CERT Security Advisory for official guidance from Taiwan's Computer Emergency Response Team. Additional information is available in the TW CERT Security Notice. Contact PLANET Technology directly to obtain patched firmware versions that address this authentication bypass vulnerability.
Workarounds
- Place switch management interfaces on dedicated, isolated management VLANs with strict access controls
- Implement IP-based access restrictions allowing only known administrative workstations to reach management interfaces
- Deploy a jump host or bastion server for all switch administration tasks
- Consider placing a reverse proxy with authentication in front of management interfaces as a temporary measure
- Disable web-based management if CLI-based management via serial console is sufficient for operations
# Network segmentation example using firewall rules
# Restrict access to switch management interface (example IP: 192.168.1.100)
# Allow only from authorized admin workstation (10.0.0.50)
iptables -A FORWARD -d 192.168.1.100 -p tcp --dport 80 -s 10.0.0.50 -j ACCEPT
iptables -A FORWARD -d 192.168.1.100 -p tcp --dport 443 -s 10.0.0.50 -j ACCEPT
iptables -A FORWARD -d 192.168.1.100 -p tcp --dport 80 -j DROP
iptables -A FORWARD -d 192.168.1.100 -p tcp --dport 443 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
