D-Link Routers

Security researchers disclosed a new unauthenticated command injection vulnerability in some of the D-link routers. The vulnerability can be tracked as CVE-2019-16920 and rated as critical.

Successful exploitation of the vulnerability results in Remote Code Execution, an attacker can trigger the vulnerability remotely to access the router login page without authentication.

D-link Routers Affected

The vulnerability was disclosed by Fortinet’s FortiGuard Labs and it has been reported to D-Link. But the bad news here is that these affected products are at End of Life (EOL) support.

Following are the products affected

  • DIR-655
  • DIR-866L
  • DIR-652
  • DHP-1565

The vulnerability starts with a poor authentication check for the router admin page, the attacker sends an arbitrary ping request to the device gateway interface that leads to command injection.

“If we try to input any special character, such as a double quote, quote, semicolon, etc., the ping fails. Unfortunately, if we pass the newline character, for example, 8.8.8.8%0als, we can perform the Command Injection attack,” reads the Fortinet report.

Successful command injection allows attackers to gain complete control over the system, by gaining access to the device attackers can steal login credentials or install backdoor onto the server.

D-link said that “the products have entered End of Service Life. There is no support or development for these devices. We recommend replacing the device with a new device that is actively supported. Using these devices is at your own risk, D-Link does not recommend further use.”

Recently a critical remote vulnerability disclosed in D-link DNS-320 Devices, that vulnerability to resides in login module which allows attackers to access the device remotely.

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