Description
In Netgear WNR854T 1.5.2 (North America), the UPNP service (/usr/sbin/upnp) is vulnerable to stack-based buffer overflow in the M-SEARCH Host header.
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2024-54344
1. Vulnerability Assessment and Severity Evaluation
The vulnerability described in EUVD-2024-54344 pertains to a stack-based buffer overflow in the UPNP service of Netgear WNR854T version 1.5.2 (North America). The Base Score of 9.8, as per CVSS 3.1, indicates a critical severity level. The vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H breaks down as follows:
- AV:N (Network): The vulnerability is exploitable over the network.
- AC:L (Low): The attack complexity is low, meaning it is relatively easy to exploit.
- PR:N (None): No privileges are required to exploit the vulnerability.
- UI:N (None): No user interaction is required.
- S:U (Unchanged): The scope of the vulnerability does not change.
- C:H (High): Confidentiality impact is high.
- I:H (High): Integrity impact is high.
- A:H (High): Availability impact is high.
Given these metrics, the vulnerability poses a significant risk to affected systems, potentially leading to complete system compromise.
2. Potential Attack Vectors and Exploitation Methods
The primary attack vector is through the UPNP service, specifically via the M-SEARCH Host header. An attacker could send a specially crafted UPNP request to the vulnerable service, causing a stack-based buffer overflow. This could lead to:
- Remote Code Execution (RCE): The attacker could execute arbitrary code on the affected device.
- Denial of Service (DoS): The attacker could crash the UPNP service or the entire device, rendering it unavailable.
- Data Exfiltration: The attacker could potentially exfiltrate sensitive data from the device.
Exploitation methods could include:
- Network Scanning: Identifying vulnerable devices on the network.
- Crafted Packets: Sending malicious UPNP packets to trigger the buffer overflow.
- Automated Scripts: Using scripts to automate the exploitation process across multiple devices.
3. Affected Systems and Software Versions
The vulnerability specifically affects:
- Netgear WNR854T version 1.5.2 (North America)
Other versions and regions may also be affected but are not explicitly mentioned in the entry. It is crucial to verify the firmware version and region of all Netgear WNR854T devices in use.
4. Recommended Mitigation Strategies
To mitigate the risk associated with this vulnerability, the following strategies are recommended:
- Firmware Update: Immediately update the firmware to a version that addresses this vulnerability. If no update is available, consider disabling the UPNP service.
- Network Segmentation: Isolate vulnerable devices on a separate network segment to limit potential attack vectors.
- Firewall Rules: Implement firewall rules to block unsolicited UPNP traffic from external networks.
- Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious UPNP traffic and alert on potential exploitation attempts.
- Regular Audits: Conduct regular security audits and vulnerability assessments to identify and address similar issues proactively.
5. Impact on European Cybersecurity Landscape
The impact of this vulnerability on the European cybersecurity landscape is significant due to the widespread use of Netgear devices in both residential and small business environments. The potential for remote code execution and data exfiltration poses a substantial risk to personal and business data. Additionally, the vulnerability could be leveraged in large-scale attacks, such as botnets, further exacerbating the threat landscape.
6. Technical Details for Security Professionals
For security professionals, the following technical details are pertinent:
- Vulnerable Component: The UPNP service (/usr/sbin/upnp) in Netgear WNR854T 1.5.2.
- Exploit Mechanism: Stack-based buffer overflow in the M-SEARCH Host header.
- Detection: Monitor network traffic for unusual UPNP requests, particularly those with oversized or malformed headers.
- Response: Implement incident response plans to quickly identify and mitigate exploitation attempts. Ensure that all affected devices are patched or isolated.
- Forensics: In case of a suspected compromise, perform forensic analysis on the affected device to determine the extent of the breach and identify any exfiltrated data.
Conclusion
EUVD-2024-54344 represents a critical vulnerability in the Netgear WNR854T 1.5.2 UPNP service. The high severity and ease of exploitation necessitate immediate mitigation actions, including firmware updates, network segmentation, and enhanced monitoring. The potential impact on the European cybersecurity landscape underscores the importance of proactive security measures to protect against such vulnerabilities.