Executive Summary

[{'type': 'paragraph', 'content': 'This vulnerability exists in the D-Link DIR-615 router, version 4.10, specifically in the adv_firewall.php file related to the DMZ Host feature.'}, {'type': 'paragraph', 'content': "It occurs because the router's web interface improperly handles the dmz_ipaddr parameter, which is used to configure firewall rules."}, {'type': 'paragraph', 'content': 'An attacker with administrative access can inject arbitrary operating system commands into this parameter due to lack of input sanitization, leading to OS command injection.'}, {'type': 'paragraph', 'content': 'These injected commands are executed with root privileges on the device, allowing full control over the router.'}] [1, 2]

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Impact Analysis

Exploitation of this vulnerability can compromise the confidentiality, integrity, and availability of the affected device.

• An attacker can execute arbitrary commands with root privileges, potentially taking full control of the router.
• This can lead to unauthorized access to network traffic, disruption of network services, or use of the device as a foothold for further attacks.
• Since the device is no longer supported by the vendor, no patches or fixes are available, increasing the risk.

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Compliance Impact

I don't know

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Detection Guidance

[{'type': 'paragraph', 'content': 'This vulnerability affects the D-Link DIR-615 router running firmware version 4.10, specifically the adv_firewall.php page related to the DMZ Host feature. Detection can involve checking for the presence of this device and firmware version on your network.'}, {'type': 'paragraph', 'content': 'One method to identify potentially vulnerable devices is to search for the URL path "adv_firewall.php" on devices accessible on your network or via internet scanning tools.'}, {'type': 'paragraph', 'content': 'Google Dorking can be used externally with the query: inurl:adv_firewall.php to find exposed devices.'}, {'type': 'paragraph', 'content': 'Since exploitation requires authenticated access, verifying if unauthorized users have administrative access to the router is critical.'}, {'type': 'paragraph', 'content': 'No specific detection commands are provided in the resources, but network scanning tools like nmap can be used to identify D-Link DIR-615 devices, and manual inspection of the web interface for the presence of the DMZ Host feature and firmware version 4.10 can help confirm vulnerability.'}] [2, 1]

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Mitigation Strategies

[{'type': 'paragraph', 'content': 'Since the affected product is no longer supported by the vendor and no patches or countermeasures are available, immediate mitigation options are limited.'}, {'type': 'paragraph', 'content': 'The recommended action is to replace the vulnerable D-Link DIR-615 router with a supported alternative device that receives security updates.'}, {'type': 'paragraph', 'content': "In the short term, restrict administrative access to the router's web interface to trusted networks and users only, to prevent remote exploitation."}, {'type': 'paragraph', 'content': 'Disable the DMZ Host feature if it is enabled, as this is the component involved in the vulnerability.'}, {'type': 'paragraph', 'content': 'Monitor network traffic for suspicious activity that could indicate exploitation attempts.'}] [2, 1]

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