CVE-2017-7405
CriticalSummary
On D-Link DIR-615 devices before v20.12PTb04, once authenticated, user identification is based on the IP address of their machine. An attacker, by spoofing the victim's IP address, may take over the administrative session without needing authentication credentials.
Risk Assessment
This vulnerability could lead to unauthorized access to the router's administrative panel, posing a serious security threat to the organization's network.
Recommendation
It is recommended to update the device to the latest firmware version and implement additional security measures such as strong passwords and restricting access to the web interface.
Original NVD description (English source)
On the D-Link DIR-615 before v20.12PTb04, once authenticated, this device identifies the user based on the IP address of his machine. By spoofing the IP address belonging to the victim's host, an attacker might be able to take over the administrative session without being prompted for authentication credentials. An attacker can get the victim's and router's IP addresses by simply sniffing the network traffic. Moreover, if the victim has web access enabled on his router and is accessing the web interface from a different network that is behind the NAT/Proxy, an attacker can sniff the network traffic to know the public IP address of the victim's router and take over his session as he won't be prompted for credentials.

