Overview
The cybersecurity landscape is riddled with vulnerabilities that can potentially compromise systems, lead to data leakage, or facilitate malicious activities. One such vulnerability is the CVE-2025-6732, a critical buffer overflow vulnerability found in UTT HiPER 840G up to version 3.1.1-190328. This vulnerability is particularly concerning due to its severity and the potential for remote exploitation. It affects the API component of the router, specifically the strcpy function of /goform/setSysAdm file, and is a stark reminder of the importance of proactive cybersecurity measures.
Vulnerability Summary
CVE ID: CVE-2025-6732
Severity: Critical (CVSS: 8.8)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise and data leakage
Affected Products
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Product | Affected Versions
UTT HiPER 840G | up to 3.1.1-190328
How the Exploit Works
The vulnerability lies in the buffer overflow potential of the strcpy function of /goform/setSysAdm file of the API component. By manipulating the argument passwd1, an attacker can cause the system to overflow the buffer, leading to potential system compromise. The attack can be initiated remotely, thus increasing the risk significantly. It is noteworthy that the exploit has been disclosed publicly, thereby increasing the possibility of its use in malicious activities.
Conceptual Example Code
An example of how the vulnerability might be exploited is presented below. This is a conceptual representation and should not be used for malicious purposes.
POST /goform/setSysAdm HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
passwd1= [Insert long string that causes buffer overflow]Mitigation and Recommendations
While the vendor, UTT Technologies, has not yet issued a patch, it is highly recommended to apply vendor patches as soon as they become available. In the meantime, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used as temporary mitigation measures. Moreover, regular auditing of router configurations and continuous monitoring of network traffic can help identify any irregularities indicative of a potential exploit.
Furthermore, as a general rule, devices should be updated regularly to the latest firmware version to protect against known vulnerabilities, and default passwords should be changed to strong, unique passwords to reduce the risk of unauthorized access.