CVE-2025-6147
BaseFortify
Publication date: 2025-06-17
Last updated on: 2025-06-23
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| totolink | a702r_firmware | 4.0.0-b20230721.1521 |
| totolink | a702r | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-119 | The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data. |
| CWE-120 | The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CVE-2025-6147 is a critical buffer overflow vulnerability in the TOTOLINK A702R router firmware version 4.0.0-B20230721.1521. It occurs in the HTTP POST request handler at the endpoint /boafrm/formSysLog, specifically involving the submit-url parameter. The vulnerability arises because the router copies input data to an output buffer without checking if the input size fits, leading to a buffer overflow. This flaw can be exploited remotely without authentication, allowing attackers to execute arbitrary code or disrupt the device. [1]
How can this vulnerability impact me? :
This vulnerability can impact you by allowing remote attackers to compromise the confidentiality, integrity, and availability of the affected router. Exploitation can lead to denial of service (DoS), potentially making the device unusable, or allow attackers to execute arbitrary code, which could lead to full device compromise and network security breaches. [1, 2]
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability can be detected by monitoring HTTP POST requests to the endpoint /boafrm/formSysLog on TOTOLINK A702R routers running firmware version 4.0.0-B20230721.1521. Specifically, look for suspicious or unusually large POST requests containing the submit-url parameter, which may indicate an attempt to exploit the buffer overflow. Network intrusion detection systems (NIDS) can be configured to alert on such POST requests. Additionally, capturing traffic with tools like tcpdump or Wireshark and filtering for POST requests to /boafrm/formSysLog can help identify potential exploitation attempts. Example command to capture such traffic: tcpdump -i <interface> -A 'tcp port 80 and (((ip[2:2] - ((ip[0]&0xf)<<2)) - ((tcp[12]&0xf0)>>2)) != 0)' | grep '/boafrm/formSysLog'. [1, 2]
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include discontinuing use of the affected TOTOLINK A702R router firmware version 4.0.0-B20230721.1521, as no known mitigations or patches are available. It is recommended to replace the affected device with an alternative product to avoid risk. Additionally, restricting network access to the router's management interface, especially blocking remote HTTP POST requests to /boafrm/formSysLog, can reduce exposure. Monitoring for exploit attempts and isolating vulnerable devices from untrusted networks are also advisable. [1]