Description
Tenda AC5 US_AC5V1.0RTL_V15.03.06.28 was discovered to contain a stack overflow via the setSchedWifi 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-2023-29177
1. Vulnerability Assessment and Severity Evaluation
The vulnerability EUVD-2023-29177, also known as CVE-2023-25214, pertains to a stack overflow in the setSchedWifi function within the Tenda AC5 router firmware version US_AC5V1.0RTL_V15.03.06.28. This vulnerability is critical due to its potential to cause a Denial of Service (DoS) or allow for arbitrary code execution via a crafted payload.
Severity Evaluation:
- CVSS Base Score: 9.8
- CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The high base score of 9.8 indicates a critical vulnerability. The CVSS vector breakdown shows that the vulnerability can be exploited over the network (AV:N), requires low complexity (AC:L), does not need privileges (PR:N) or user interaction (UI:N), and has a high impact on confidentiality, integrity, and availability (C:H/I:H/A:H).
2. Potential Attack Vectors and Exploitation Methods
Attack Vectors:
- Network-Based Attack: Given the network attack vector (AV:N), an attacker can exploit this vulnerability remotely without needing physical access to the device.
- Crafted Payload: The attacker can send a specially crafted payload to the
setSchedWififunction, causing a stack overflow.
Exploitation Methods:
- Denial of Service (DoS): By sending a malformed payload, an attacker can crash the device, leading to a DoS condition.
- Arbitrary Code Execution: More sophisticated attackers can craft a payload that not only causes a stack overflow but also injects and executes arbitrary code, potentially leading to full device compromise.
3. Affected Systems and Software Versions
Affected Systems:
- Tenda AC5 routers running firmware version US_AC5V1.0RTL_V15.03.06.28.
Software Versions:
- Specifically, the vulnerability is present in the firmware version US_AC5V1.0RTL_V15.03.06.28. Other versions may also be affected but have not been explicitly mentioned in the EUVD entry.
4. Recommended Mitigation Strategies
Immediate Actions:
- Firmware Update: Users should immediately update their Tenda AC5 routers to the latest firmware version provided by the vendor.
- Network Segmentation: Isolate the affected devices from critical networks to limit potential damage.
- Firewall Rules: Implement strict firewall rules to restrict access to the router's management interface.
Long-Term Strategies:
- Regular Patching: Establish a routine for regularly checking and applying firmware updates.
- Intrusion Detection Systems (IDS): Deploy IDS to monitor for unusual network traffic patterns that may indicate an exploitation attempt.
- Security Audits: Conduct regular security audits and vulnerability assessments on network devices.
5. Impact on European Cybersecurity Landscape
The vulnerability poses a significant risk to European cybersecurity, particularly for organizations and individuals using Tenda AC5 routers. Given the widespread use of such devices in both home and small business environments, the potential for large-scale disruption is high. The ability to execute arbitrary code can lead to data breaches, unauthorized access, and further propagation of malware within networks.
6. Technical Details for Security Professionals
Vulnerability Details:
- Function Affected:
setSchedWifi - Type of Vulnerability: Stack overflow
- Exploitation: Crafted payload sent to the
setSchedWififunction can cause a stack overflow, leading to DoS or arbitrary code execution.
Detection and Monitoring:
- Log Analysis: Monitor router logs for unusual activity or repeated failed attempts to access the
setSchedWififunction. - Network Traffic Analysis: Use network monitoring tools to detect anomalous traffic patterns that may indicate an exploitation attempt.
Mitigation Steps:
- Update Firmware: Ensure all Tenda AC5 routers are updated to the latest firmware version.
- Access Control: Implement strict access controls and authentication mechanisms for router management interfaces.
- Incident Response Plan: Develop and maintain an incident response plan specific to network device vulnerabilities.
References:
By addressing this vulnerability promptly and implementing robust security measures, organizations can mitigate the risks associated with EUVD-2023-29177 and enhance their overall cybersecurity posture.