CVE-2025-8136
BaseFortify
Publication date: 2025-07-25
Last updated on: 2025-07-28
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-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. |
| 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a critical buffer overflow in the TOTOLINK A702R router firmware version 4.0.0-B20230721.1521. It occurs in the HTTP POST request handler, specifically in the /boafrm/formFilter endpoint. The vulnerability arises from improper handling of the 'ip6addr' argument, where input data is copied without checking its size, causing a buffer overflow. This flaw allows an attacker to remotely exploit the router by sending a crafted POST request, potentially disrupting its normal operation. [1, 2]
How can this vulnerability impact me? :
Exploitation of this vulnerability can lead to a denial of service (DoS) condition on the affected router, disrupting its normal operation. Additionally, it may allow an attacker to compromise the confidentiality, integrity, and availability of the device remotely without authentication. This means the router could be taken offline or manipulated, impacting network security and connectivity. [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 for suspicious HTTP POST requests sent to the endpoint /boafrm/formFilter, especially those containing unusually large or malformed 'ip6addr' arguments that could trigger a buffer overflow. Network intrusion detection systems (NIDS) or web application firewalls (WAF) can be configured to alert on such requests. Specific commands are not provided in the resources, but using tools like curl or wget to send crafted POST requests to /boafrm/formFilter and observing the device's response or logs may help detect exploitation attempts. [1, 2]
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include replacing the affected TOTOLINK A702R router running firmware version 4.0.0-B20230721.1521 with an alternative device, as no known mitigations or countermeasures have been identified. Additionally, restricting access to the device's management interface from untrusted networks and monitoring for exploit attempts can help reduce risk until replacement is possible. [2]