Overview
A critical security vulnerability, identified as CVE-2025-8019, has recently been discovered in Shenzhen Libituo Technology LBT-T300-T310 version 2.2.3.6. This vulnerability can be exploited remotely by an attacker, potentially leading to a system compromise or data leakage. It is a serious flaw that requires immediate attention due to its high criticality and potential impact on the affected systems.
The vulnerability lies in the function sub_40B6F0 of the file at/appy.cgi. The manipulation of the argument wan_proto can result in buffer overflow, making the system susceptible to further malicious attacks. It’s important for organizations using these systems to understand the potential risks and take immediate action for remediation.
Vulnerability Summary
CVE ID: CVE-2025-8019
Severity: Critical, CVSS Score 8.8
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise, potential data leakage
Affected Products
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Product | Affected Versions
Shenzhen Libituo Technology LBT-T300-T310 | 2.2.3.6
How the Exploit Works
This exploit works by manipulating the wan_proto argument in the function sub_40B6F0 of the at/appy.cgi file, causing buffer overflow. Buffer overflow is a common type of security exploit where an application writes more data to a fixed-length block of memory (the buffer) than the buffer is designed to hold. This overflow can cause the application to crash or, in the worst-case scenario, allow an attacker to execute arbitrary code on the system.
Conceptual Example Code
As an illustrative example, an attacker might send a malicious HTTP request similar to the one below to the vulnerable endpoint:
POST /at/appy.cgi HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
wan_proto=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...In the above example, the “wan_proto” argument is filled with an excessively long string of “A” characters, intended to overflow the buffer and potentially allow the attacker to execute arbitrary code.
Please note: This is a simplified, conceptual example and may not represent an actual exploit code for this vulnerability.