Description
Tenda AC5 US_AC5V1.0RTL_V15.03.06.28 was discovered to contain a stack overflow via the add_white_node function. This vulnerability allows attackers to cause a Denial of Service (DoS) or execute arbitrary code via a crafted payload.
EPSS Score:
1%
Comprehensive Technical Analysis of EUVD-2023-29183
1. Vulnerability Assessment and Severity Evaluation
The vulnerability EUVD-2023-29183, also known as CVE-2023-25220, pertains to a stack overflow in the add_white_node function within the Tenda AC5 firmware version US_AC5V1.0RTL_V15.03.06.28. This vulnerability is critical, with a CVSS Base Score of 9.8, indicating a high level of severity. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H breaks down as follows:
- Attack Vector (AV): Network (N) - The vulnerability is exploitable over the network.
- Attack Complexity (AC): Low (L) - The attack requires minimal skill or resources.
- Privileges Required (PR): None (N) - No special privileges are needed to exploit the vulnerability.
- User Interaction (UI): None (N) - No user interaction is required.
- Scope (S): Unchanged (U) - The vulnerability does not affect other systems beyond the targeted device.
- Confidentiality (C): High (H) - The vulnerability allows unauthorized access to sensitive information.
- Integrity (I): High (H) - The vulnerability allows unauthorized modification of data.
- Availability (A): High (H) - The vulnerability allows disruption of services.
Given these metrics, the vulnerability poses a significant risk to affected systems, potentially leading to Denial of Service (DoS) or arbitrary code execution.
2. Potential Attack Vectors and Exploitation Methods
The primary attack vector is network-based, meaning an attacker can exploit the vulnerability remotely. The exploitation method involves crafting a malicious payload that triggers the stack overflow in the add_white_node function. This can be achieved through:
- Network Scanning: Identifying vulnerable Tenda AC5 devices on the network.
- Payload Crafting: Creating a specially crafted payload that exploits the stack overflow.
- Remote Execution: Sending the payload to the vulnerable device, leading to DoS or arbitrary code execution.
3. Affected Systems and Software Versions
The vulnerability specifically affects Tenda AC5 devices running firmware version US_AC5V1.0RTL_V15.03.06.28. It is crucial to note that other versions of the firmware may also be affected if they share the same codebase or have not been patched for this specific issue.
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.
- Network Segmentation: Isolate vulnerable devices from critical networks to limit potential attack surfaces.
- Firewall Rules: Implement strict firewall rules to block unauthorized access to the device.
- Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious network activity targeting the vulnerable function.
- Regular Audits: Conduct regular security audits and vulnerability assessments to identify and address similar issues proactively.
5. Impact on European Cybersecurity Landscape
The vulnerability poses a significant threat to European cybersecurity, particularly in environments where Tenda AC5 devices are widely deployed. The potential for remote exploitation and the high impact on confidentiality, integrity, and availability make it a critical concern for organizations and individuals alike. The widespread use of such devices in home and small business networks amplifies the risk, as these environments often lack robust security measures.
6. Technical Details for Security Professionals
For security professionals, the following technical details are pertinent:
- Vulnerable Function: The
add_white_nodefunction in the Tenda AC5 firmware is the point of vulnerability. - Exploitation: The stack overflow can be triggered by sending a crafted payload that exceeds the buffer size allocated for the function.
- Detection: Monitoring network traffic for unusual patterns targeting the
add_white_nodefunction can help detect potential exploitation attempts. - Patching: Ensure that the firmware update process is secure and verified to prevent the introduction of additional vulnerabilities.
- Logging and Monitoring: Implement comprehensive logging and monitoring to detect and respond to any suspicious activities related to this vulnerability.
Conclusion
EUVD-2023-29183 represents a critical vulnerability in Tenda AC5 devices that requires immediate attention. The high severity and potential for remote exploitation underscore the need for prompt mitigation strategies. Organizations and individuals using affected devices should prioritize firmware updates and implement robust security measures to protect against potential attacks.