Description
Tenda AC5 US_AC5V1.0RTL_V15.03.06.28 was discovered to contain a stack overflow via the saveParentControlInfo 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-2023-29178
1. Vulnerability Assessment and Severity Evaluation
The vulnerability EUVD-2023-29178, also known as CVE-2023-25215, involves a stack overflow in the saveParentControlInfo 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 risk to affected systems. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H highlights the following characteristics:
- Attack Vector (AV:N): The vulnerability can be exploited remotely over the network.
- Attack Complexity (AC:L): The attack requires low complexity to exploit.
- 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): High impact on confidentiality.
- Integrity (I:H): High impact on integrity.
- Availability (A:H): High impact on availability.
2. Potential Attack Vectors and Exploitation Methods
The stack overflow vulnerability in the saveParentControlInfo function can be exploited through crafted payloads sent to the device. Potential attack vectors include:
- Remote Exploitation: An attacker can send a specially crafted packet to the device over the network, leading to a stack overflow.
- Denial of Service (DoS): The attacker can cause the device to crash or become unresponsive.
- Arbitrary Code Execution: The attacker can execute arbitrary code on the device, potentially leading to full system compromise.
Exploitation methods may involve:
- Network Scanning: Identifying vulnerable devices on the network.
- Payload Crafting: Creating a payload that triggers the stack overflow.
- Exploit Delivery: Sending the payload to the target device via network protocols.
3. Affected Systems and Software Versions
The vulnerability specifically affects:
- Device: Tenda AC5
- Firmware Version: US_AC5V1.0RTL_V15.03.06.28
Other versions of the firmware may also be affected, but this has not been confirmed. Users and administrators should verify the firmware version of their Tenda AC5 devices to determine if they are at risk.
4. Recommended Mitigation Strategies
To mitigate the risk associated with this vulnerability, the following strategies are recommended:
- Firmware Update: Apply the latest firmware updates provided by Tenda. Ensure that the firmware version is higher than US_AC5V1.0RTL_V15.03.06.28.
- Network Segmentation: Isolate vulnerable devices on separate network segments to limit exposure.
- Firewall Rules: Implement firewall rules to restrict access to the device from untrusted networks.
- 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 potential risks.
5. Impact on European Cybersecurity Landscape
The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for organizations and individuals using Tenda AC5 devices. The potential for remote exploitation and arbitrary code execution can lead to data breaches, service disruptions, and unauthorized access to sensitive information. Organizations in critical sectors such as healthcare, finance, and government should prioritize mitigation efforts to protect against potential attacks.
6. Technical Details for Security Professionals
For security professionals, the following technical details are pertinent:
- Vulnerable Function:
saveParentControlInfo - Exploit Type: Stack Overflow
- Payload Characteristics: Crafted payloads designed to overflow the stack buffer.
- Detection Methods:
- Network Traffic Analysis: Monitor for unusual network traffic patterns targeting the vulnerable function.
- Log Analysis: Review device logs for indications of stack overflow or unexpected behavior.
- Memory Analysis: Conduct memory analysis to identify stack corruption and potential code execution.
References:
By addressing this vulnerability promptly and implementing robust mitigation strategies, organizations can significantly reduce the risk of exploitation and protect their critical assets.