Description
Tenda AC10 US_AC10V4.0si_V16.03.10.13_cn was discovered to contain a stack overflow via the sub_4A75C0 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-2023-30805
1. Vulnerability Assessment and Severity Evaluation
The vulnerability EUVD-2023-30805, also known as CVE-2023-27015, involves a stack overflow in the Tenda AC10 router firmware version US_AC10V4.0si_V16.03.10.13_cn. This vulnerability is located in the sub_4A75C0 function. The stack overflow can be exploited to cause a Denial of Service (DoS) or execute arbitrary code, leading to significant security risks.
Severity Evaluation:
- CVSS Base Score: 9.8 (Critical)
- CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The high CVSS score indicates that this vulnerability is critical. The attack vector (AV:N) is network-based, requiring no user interaction (UI:N) and no privileges (PR:N). The complexity of the attack is low (AC:L), and the impact on confidentiality, integrity, and availability is high (C:H/I:H/A:H).
2. Potential Attack Vectors and Exploitation Methods
Attack Vectors:
- Network-Based Attack: An attacker can exploit this vulnerability remotely over the network.
- Crafted Payload: The attacker can send a specially crafted payload to the vulnerable function
sub_4A75C0, causing a stack overflow.
Exploitation Methods:
- DoS Attack: By sending a malformed packet, an attacker can cause the router to crash, leading to a Denial of Service.
- Arbitrary Code Execution: An attacker can inject malicious code into the stack, leading to arbitrary code execution on the router. This can result in complete control over the device, including data exfiltration, unauthorized access, and further network compromise.
3. Affected Systems and Software Versions
Affected Systems:
- Tenda AC10 routers running firmware version US_AC10V4.0si_V16.03.10.13_cn.
Software Versions:
- Specifically, the vulnerability is present in the firmware version US_AC10V4.0si_V16.03.10.13_cn.
4. Recommended Mitigation Strategies
Immediate Mitigation:
- Firmware Update: Users should immediately update their Tenda AC10 routers to the latest firmware version provided by the vendor.
- Network Segmentation: Isolate the router from critical network segments to limit the potential impact of an exploit.
- Firewall Rules: Implement strict firewall rules to restrict access to the router's management interface.
Long-Term Mitigation:
- Regular Patching: Ensure that all network devices are regularly updated with the latest security patches.
- Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious network activity that may indicate an exploitation attempt.
- Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate potential vulnerabilities.
5. Impact on European Cybersecurity Landscape
The vulnerability poses a significant risk to European organizations and individuals using the affected Tenda AC10 routers. Given the critical nature of the vulnerability, successful exploitation can lead to widespread disruption and potential data breaches. This underscores the importance of timely patching and robust cybersecurity practices to protect against such threats.
6. Technical Details for Security Professionals
Vulnerability Details:
- Function Affected:
sub_4A75C0 - Type of Vulnerability: Stack Overflow
- Exploitation: The vulnerability can be triggered by sending a crafted payload that overflows the stack buffer in the
sub_4A75C0function.
Detection and Response:
- Log Analysis: Monitor router logs for unusual activity or crashes that may indicate an exploitation attempt.
- Traffic Analysis: Use network traffic analysis tools to detect anomalous traffic patterns that may be associated with the exploitation of this vulnerability.
- Incident Response: Have an incident response plan in place to quickly address any detected exploitation attempts. This includes isolating affected devices, applying patches, and conducting forensic analysis.
References:
By addressing this vulnerability promptly and implementing robust security measures, organizations can significantly reduce the risk of exploitation and protect their networks from potential attacks.