CVE-2025-11339
BaseFortify
Publication date: 2025-10-06
Last updated on: 2025-11-19
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| dlink | di-7100g_c1_firmware | 2025-09-28 |
| dlink | di-7100g_c1 | * |
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?
This vulnerability is a buffer overflow in the D-Link DI-7100G C1 device's firmware, specifically in the function sub_4BD4F8 within the file /webchat/hi_block.asp of the jhttpd component. It occurs due to improper handling of the 'popupId' parameter, where input data is copied to a buffer without verifying its size, allowing an attacker to overflow the buffer. This flaw can be exploited remotely without authentication and may lead to arbitrary code execution or denial of service. [1, 2]
How can this vulnerability impact me? :
The vulnerability can impact you by allowing remote attackers to execute arbitrary code or cause denial of service on the affected device. It compromises the confidentiality, integrity, and availability of the device, potentially leading to unauthorized control or disruption of services. [1, 2]
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability can be detected by identifying devices running the vulnerable D-Link DI-7100G C1 firmware that expose the /webchat/hi_block.asp endpoint. One method is to use Google dorking with the query "inurl:webchat/hi_block.asp" to find potentially vulnerable targets. On your network, you can scan for devices responding to HTTP requests at this path. For example, using curl or wget to request http://<device-ip>/webchat/hi_block.asp and checking the response. Additionally, monitoring for unusual or malformed requests containing the popupId parameter that could trigger the buffer overflow may help detect exploitation attempts. [2]
What immediate steps should I take to mitigate this vulnerability?
No known mitigations or countermeasures have been reported for this vulnerability. The recommended immediate step is to replace the affected D-Link DI-7100G C1 device with an alternative product. Additionally, restricting access to the vulnerable endpoint by network segmentation or firewall rules to block external access to /webchat/hi_block.asp can reduce exposure. Monitoring for exploitation attempts and applying any future patches or updates from the vendor when available is also advised. [2]