Description
Netgear WNR854T 1.5.2 (North America) is vulnerable to Command Injection. An attacker can send a specially crafted request to post.cgi, updating the nvram parameter pppoe_peer_mac and forcing a reboot. This will result in command injection.
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2024-54343
1. Vulnerability Assessment and Severity Evaluation
The vulnerability described in EUVD-2024-54343 affects the Netgear WNR854T router, specifically version 1.5.2 (North America). The issue is classified as a Command Injection vulnerability, which allows an attacker to execute arbitrary commands on the device by sending a specially crafted request to the post.cgi endpoint. The attacker can update the nvram parameter pppoe_peer_mac and force a reboot, leading to command injection.
Severity Evaluation:
- Base Score: 9.8 (Critical)
- Base Score Version: CVSS 3.1
- Base Score Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The high base score indicates a critical vulnerability due to the following factors:
- Attack Vector (AV:N): The vulnerability can be exploited remotely over the network.
- Attack Complexity (AC:L): The attack requires low complexity.
- Privileges Required (PR:N): No privileges are required to exploit the vulnerability.
- User Interaction (UI:N): No user interaction is required.
- Scope (S:U): The vulnerability affects the same security scope.
- Confidentiality (C:H), Integrity (I:H), Availability (A:H): The vulnerability has a high impact on confidentiality, integrity, and availability.
2. Potential Attack Vectors and Exploitation Methods
Attack Vectors:
- Remote Exploitation: An attacker can send a malicious HTTP request to the
post.cgiendpoint of the router. - Network-Based Attacks: The vulnerability can be exploited over the network, making it accessible to attackers who can reach the router's web interface.
Exploitation Methods:
- Crafted HTTP Request: The attacker crafts an HTTP request to update the
nvramparameterpppoe_peer_macand forces a reboot, injecting malicious commands. - Automated Scripts: Attackers can use automated scripts to scan for vulnerable routers and exploit the vulnerability en masse.
3. Affected Systems and Software Versions
Affected Systems:
- Netgear WNR854T router
Software Versions:
- Firmware version 1.5.2 (North America)
4. Recommended Mitigation Strategies
Immediate Actions:
- Firmware Update: Ensure that the router's firmware is updated to the latest version that addresses this vulnerability.
- Network Segmentation: Isolate the router from critical networks to limit the potential impact of an exploit.
- Firewall Rules: Implement strict firewall rules to restrict access to the router's web interface.
Long-Term Strategies:
- Regular Patching: Establish a regular patching and update schedule for all network devices.
- Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious activity targeting the router.
- Security Audits: Conduct regular security audits to identify and mitigate vulnerabilities.
5. Impact on European Cybersecurity Landscape
The vulnerability poses a significant risk to European cybersecurity, particularly for organizations and individuals using the affected Netgear router. The potential for remote command injection can lead to unauthorized access, data breaches, and disruption of services. Given the widespread use of routers in both home and business environments, the impact could be extensive if not addressed promptly.
6. Technical Details for Security Professionals
Vulnerability Details:
- Endpoint:
post.cgi - Parameter:
nvramparameterpppoe_peer_mac - Exploit Method: Crafted HTTP request to update the parameter and force a reboot, injecting commands.
Detection and Monitoring:
- Log Analysis: Monitor router logs for unusual activity, particularly requests to
post.cgi. - Network Traffic Analysis: Use network traffic analysis tools to detect and block malicious requests targeting the router.
References:
Conclusion: The Command Injection vulnerability in the Netgear WNR854T router (version 1.5.2) is critical and requires immediate attention. Organizations and individuals should prioritize updating the firmware and implementing robust security measures to mitigate the risk. Continuous monitoring and regular security audits are essential to maintain a secure network environment.