CVE-2025-5623
BaseFortify
Publication date: 2025-06-05
Last updated on: 2025-06-06
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| dlink | dir-816_firmware | 1.10cnb05 |
| dlink | dir-816 | * |
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-787 | The product writes data past the end, or before the beginning, of the intended buffer. |
| CWE-121 | A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CVE-2025-5623 is a critical stack-based buffer overflow vulnerability in the D-Link DIR-816 router (version 1.10CNB05). It occurs in the qosClassifier function at the /goform/qosClassifier endpoint, where improper handling of the dip_address and sip_address parameters allows an attacker to overflow the stack by sending crafted input. This flaw can be exploited remotely without any authentication, potentially leading to compromise of the device's confidentiality, integrity, and availability. [1, 2]
How can this vulnerability impact me? :
This vulnerability can severely impact you by allowing remote attackers to execute a stack-based buffer overflow attack without authentication. This can lead to crashing the router, executing arbitrary code remotely, and compromising the confidentiality, integrity, and availability of the affected device. Since the affected product is no longer supported and no mitigations exist, the risk of exploitation is high. [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 unusual or malformed HTTP requests to the endpoint /goform/qosClassifier, specifically those containing unusually long or crafted dip_address or sip_address parameters that may trigger a stack-based buffer overflow. Since the exploit is publicly available and triggers remotely without authentication, network intrusion detection systems (NIDS) can be configured to alert on such suspicious requests. However, no specific detection commands are provided in the available resources. [1, 2]
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include discontinuing the use of the affected D-Link DIR-816 router version 1.10CNB05, as no vendor patches or mitigations are currently available. It is recommended to replace the affected product with a supported alternative to avoid exploitation. Additionally, restricting network access to the device, implementing firewall rules to block access to the /goform/qosClassifier endpoint, and monitoring for exploit attempts can help reduce risk temporarily. [1]