CERT Tells Belkin It’s N600 Router Is a Hackers Playground

Belkin’s N-600 DB Wireless Dual Band N+ router is plagued with multiple vulnerabilities that can allow for a remote attacker to completely takeover the device and then mount additional attacks on your home or office network once they get in.

CERT has issued a notice that states model F9K1102 v2 with firmware version 2.10.17 and possibly earlier contain more than five serious vulnerabilities in the router. Some of the vulnerabilities include, Clear Text transmissions of sensitive information and cross-site request forgery.

CWE-330: Use of Insufficiently Random Values – CVE-2015-5987

DNS queries originating from the Belkin N600, such as those to resolve the names of firmware update and NTP servers, use predictable TXIDs that start at 0x0002 and increase incrementally. An attacker with the ability to spoof DNS responses can cause the router to contact incorrect or malicious hosts under the attacker’s control.

CWE-319: Cleartext Transmission of Sensitive Information

Belkin uses HTTP by default for checking and transmitting firmware update information to vulnerable routers. An attacker capable of conducting man-in-the-middle attacks can manipulate traffic to block updates or inject arbitrary files.

CWE-255: Credentials Management – CVE-2015-5988

Belkin N600 by default does not set a password for the web management interface. A local area network (LAN) attacker can gain privileged access to the web management interface or leverage the default absence of credentials in remote attacks such as cross-site request forgery.

CWE-603: Use of Client-Side Authentication – CVE-2015-5989

When a password is implemented in the Belkin N600 web management interface, authorization is enforced client-side by the browser. By intercepting packets from the embedded server containing the strings "LockStatus": "1" and"Login_Success": "0" and modifying the values to “2” and “1” respectively, an attacker can bypass authentication and gain full, privileged access to restricted pages of the web management interface.

CWE-352: Cross-Site Request Forgery (CSRF) – CVE-2015-5990

Belkin N600 routers contain a global cross-site request forgery (CSRF) vulnerability. An attacker can perform actions with the same permissions as a victim user, provided the victim has an active session and is induced to trigger the malicious request. Note that in default configurations lacking password protection, an attacker can establish an active session as part of an attack and does not require a victim to be logged in.

An unauthenticated attacker may be able to spoof DNS responses to cause vulnerable devices to contact attacker-controlled hosts or induce an authenticated user into making an unintentional request to the web server that will be treated as an authentic request. A LAN-based attacker can bypass authentication to take complete control of vulnerable devices.

At this time there is no known fix for the vulnerabilities until Belkin releases an update.

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