CVE-2025-14140: Critical Buffer Overflow in UTT 进取 520W – Exploit Publicly Available

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Overview

CVE-2025-14140 is a medium-severity buffer overflow vulnerability discovered in UTT 进取 520W version 1.7.7-180627. This flaw resides within the strcpy function of the /goform/websHostFilter component. By manipulating the addHostFilter argument, a remote attacker can trigger a buffer overflow, potentially leading to code execution or denial of service. The vulnerability is unpatched, and a public exploit is available, increasing the risk of exploitation.

Technical Details

The vulnerability stems from the insecure use of the strcpy function. The strcpy function does not perform bounds checking, making it susceptible to buffer overflows if the source data exceeds the allocated size of the destination buffer. In this case, the addHostFilter parameter, when passed to the /goform/websHostFilter endpoint, is copied into a buffer without proper size validation. This allows an attacker to send a specially crafted, oversized string that overflows the buffer, overwriting adjacent memory and potentially hijacking control flow.

Specifically:

  • Affected Product: UTT 进取 520W
  • Affected Version: 1.7.7-180627
  • Vulnerable Function: strcpy in /goform/websHostFilter
  • Attack Vector: Remote
  • Vulnerable Parameter: addHostFilter

CVSS Analysis

The Common Vulnerability Scoring System (CVSS) provides a standardized way to assess the severity of security vulnerabilities. CVE-2025-14140 has a CVSS v3 score of:

  • CVSS Score: 6.5 (Medium)

This score reflects the following characteristics:

  • Attack Vector (AV): Network (N) – The vulnerability is remotely exploitable.
  • Attack Complexity (AC): Low (L) – Exploitation requires little to no specialized access conditions or circumstances.
  • Privileges Required (PR): None (N) – No privileges are required to exploit the vulnerability.
  • User Interaction (UI): None (N) – No user interaction is required to exploit the vulnerability.
  • Scope (S): Unchanged (U)
  • Confidentiality Impact (C): None (N)
  • Integrity Impact (I): Low (L)
  • Availability Impact (A): Low (L)

Possible Impact

Successful exploitation of CVE-2025-14140 could lead to the following consequences:

  • Denial of Service (DoS): Crashing the device or making it unresponsive.
  • Remote Code Execution (RCE): Potentially allowing an attacker to execute arbitrary code on the device with the privileges of the vulnerable process.
  • Information Disclosure: In some scenarios, the attacker might be able to leak sensitive information from the device’s memory.

Mitigation or Patch Steps

Unfortunately, at the time of this writing, no patch or official mitigation is available from the vendor. The vendor was contacted but did not respond. Given the lack of vendor support and the existence of a public exploit, the following are recommended workarounds (use with caution and test thoroughly):

  • Network Segmentation: Isolate the UTT 进取 520W device from the public internet and other critical network segments.
  • Access Control Lists (ACLs): Implement strict ACLs to limit access to the device’s web interface and other services to only trusted IP addresses.
  • Web Application Firewall (WAF): If feasible, deploy a WAF in front of the device to filter malicious requests and potentially block attempts to exploit the vulnerability. Configure rules to limit the size and content of the addHostFilter parameter.
  • Device Replacement: Consider replacing the device with a more secure alternative from a vendor with a better security track record, if the above measures are not sufficient.

Important Note: These are workarounds and do not fully address the underlying vulnerability. A proper patch from the vendor is the ideal solution.

References

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