CVE-2025-44894

Comprehensive Technical Analysis of CVE-2025-44894

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-44894 Description: The vulnerability involves a stack overflow in the web_radiusSrv_dftParam_post function of FW-WGS-804HPT v1.305b241111, triggered by the radDftParamKey parameter. CVSS Score: 9.8

Severity Evaluation:

• CVSS Base Score: 9.8 (Critical)
• Impact Metrics:
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: High
• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged

The high CVSS score indicates that this vulnerability is critical and poses a significant risk to affected systems. The stack overflow can lead to arbitrary code execution, potentially allowing attackers to gain control over the device.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Network-Based Attack: An attacker can exploit this vulnerability over the network by sending specially crafted HTTP requests to the affected device.
• Remote Code Execution: By exploiting the stack overflow, an attacker can execute arbitrary code on the device, leading to full system compromise.

Exploitation Methods:

• Buffer Overflow: The attacker can send a maliciously crafted radDftParamKey parameter that exceeds the allocated buffer size, causing a stack overflow.
• Payload Delivery: The overflow can be used to inject malicious code, which can then be executed in the context of the vulnerable process.

3. Affected Systems and Software Versions

Affected Systems:

• Device: FW-WGS-804HPT
• Firmware Version: v1.305b241111

Software Versions:

• The vulnerability specifically affects the web_radiusSrv_dftParam_post function in the mentioned firmware version.

4. Recommended Mitigation Strategies

Immediate Actions:

• Patching: Apply the latest firmware update provided by the vendor to mitigate the vulnerability.
• Network Segmentation: Isolate affected devices from critical networks to limit the potential impact of an exploit.
• Firewall Rules: Implement strict firewall rules to restrict access to the vulnerable function.

Long-Term Strategies:

• Regular Updates: Ensure that all devices are regularly updated with the latest security patches.
• Intrusion Detection: Deploy intrusion detection systems (IDS) to monitor for suspicious activity related to this vulnerability.
• Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate similar issues.

5. Impact on Cybersecurity Landscape

Immediate Impact:

• Device Compromise: Affected devices can be compromised, leading to unauthorized access and potential data breaches.
• Network Security: The vulnerability can be used to pivot within the network, compromising other connected systems.

Long-Term Impact:

• Reputation Damage: Organizations using affected devices may suffer reputational damage if a breach occurs.
• Increased Attack Surface: The presence of such vulnerabilities increases the overall attack surface, making it easier for attackers to find and exploit weaknesses.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function: web_radiusSrv_dftParam_post
• Parameter: radDftParamKey
• Issue: Stack overflow due to insufficient bounds checking on the radDftParamKey parameter.

Exploitation Steps:

1. Identify Target: Locate the vulnerable device on the network.
2. Craft Payload: Create a payload that exceeds the buffer size for the radDftParamKey parameter.
3. Send Request: Send the crafted HTTP request to the device, triggering the stack overflow.
4. Execute Code: Inject and execute arbitrary code to gain control over the device.

Detection and Response:

• Log Analysis: Monitor logs for unusual activity related to the web_radiusSrv_dftParam_post function.
• Behavioral Analysis: Use behavioral analysis tools to detect anomalous behavior indicative of a stack overflow exploit.
• Incident Response: Have an incident response plan in place to quickly address any detected exploits.

Conclusion: CVE-2025-44894 is a critical vulnerability that requires immediate attention. Organizations should prioritize patching affected devices and implementing robust security measures to mitigate the risk. Regular updates and proactive security practices are essential to protect against such threats.