Overview
A critical vulnerability has been discovered within TOTOLINK EX1200T, specifically in versions up to 4.1.2cu.5232_B20210713. This vulnerability, identified as CVE-2025-5908, is of utmost significance as it directly impacts the HTTP POST Request Handler component, leading to a buffer overflow. The gravity of the situation is compounded by the fact that this exploit has been publicly disclosed and can be initiated remotely, thus posing a significant risk to all systems using the affected versions.
The repercussions of this vulnerability are grave, as it opens up the potential for system compromise and data leakage. Therefore, it is crucial for cybersecurity professionals and system administrators to understand the nature of this vulnerability and take appropriate measures to mitigate its impact.
Vulnerability Summary
CVE ID: CVE-2025-5908
Severity: Critical, CVSS Score 8.8
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
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Product | Affected Versions
TOTOLINK EX1200T | Up to 4.1.2cu.5232_B20210713
How the Exploit Works
The vulnerability resides in the HTTP POST Request Handler’s processing of the file /boafrm/formIpQoS. An attacker can manipulate this process to cause a buffer overflow. A buffer overflow occurs when more data is written to a buffer than it can hold. This vulnerability allows an attacker to overwrite adjacent memory locations, potentially leading to the execution of arbitrary code or a Denial of Service (DoS) state.
Conceptual Example Code
Below is a conceptual example of how the vulnerability might be exploited.
POST /boafrm/formIpQoS HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
payload=<Buffer overflow inducing payload here>In this example, the malicious payload is designed to induce a buffer overflow in /boafrm/formIpQoS, potentially leading to unauthorized code execution or a system crash.
Mitigation Measures
The primary mitigation measure is to apply the vendor patch as soon as it becomes available. If the patch is not yet available, a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can be used as temporary mitigation. These systems can detect and block attempts to exploit this vulnerability. Regardless of the approach, it is necessary to take immediate action to prevent potential system compromise or data leakage.