Overview
The Common Vulnerabilities and Exposures system has recently identified a critical vulnerability, CVE-2025-55613, which poses a significant risk to the integrity of systems running Tenda O3V2 1.0.0.12(3880). This Buffer Overflow vulnerability has the potential to be exploited by malicious actors to compromise systems and expose sensitive data. In a world where data is king, and protection of this data paramount, understanding and mitigating such vulnerabilities is of crucial importance for organizations and individuals alike.
Vulnerability Summary
CVE ID: CVE-2025-55613
Severity: Critical (CVSS score: 9.8)
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
Tenda O3V2 | 1.0.0.12(3880)
How the Exploit Works
The vulnerability stems from a buffer overflow in the fromSafeSetMacFilter function in Tenda O3V2. This can be triggered via the mac parameter, leading to a potential system compromise. In essence, if an attacker sends a specially crafted payload that exceeds the allocated buffer size for the mac parameter, it can overflow the buffer, potentially leading to arbitrary code execution or a system crash.
Conceptual Example Code
Here is a simplified conceptual example of how the vulnerability might be exploited. This is a hypothetical HTTP request where a malicious payload is inserted into the mac parameter:
POST /fromSafeSetMacFilter HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "mac": "00:00:00:00:00:00[OVERFLOW STRING]" }In this example, “[OVERFLOW STRING]” represents a string of characters that exceeds the buffer limit set for the mac parameter, thereby causing an overflow.
Note: The above is a conceptual example for understanding purposes and does not represent an actual exploit.
Mitigation
To mitigate the vulnerability, it is recommended that users apply the patch provided by the vendor. Until the patch is applied, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used as a temporary mitigation measure. Always make sure to keep your systems up-to-date and follow the latest cybersecurity best practices to reduce the risk of exploitation.