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CERT Coordination Center

Netgear G54/N150 Wireless Router WNR1000v3 uses insufficiently random values for DNS queries

Vulnerability Note VU#403568

Original Release Date: 2015-12-10 | Last Revised: 2015-12-10


Netgear G54/N150 Wireless Router WNR1000v3, firmware version and possibly earlier, uses insufficiently random values for DNS queries and is vulnerable to DNS spoofing attacks.


CWE-330: Use of Insufficiently Random Values - CVE-2015-8263

The Netgear G54/N150 Wireless Router WNR1000v3 uses static source ports for all DNS queries originating from the local area network (LAN). An attacker with the ability to spoof DNS responses can cause WNR1000v3 LAN clients to contact incorrect or malicious hosts under the attacker's control.

The following graph shows a distribution of 229 DNS queries captured on the WAN port of the WNR1000v3:


A remote, unauthenticated attacker may be able to spoof DNS responses to cause WNR1000v3 LAN clients to contact attacker-controlled hosts.


The CERT/CC is currently unaware of a practical solution to this problem.

Vendor Information

Affected   Unknown   Unaffected

Netgear, Inc.

Notified:  October 08, 2015 Updated:  December 10, 2015



Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

CVSS Metrics

Group Score Vector
Base 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N
Temporal 4.5 E:POC/RL:U/RC:C
Environmental 1.1 CDP:ND/TD:L/CR:ND/IR:ND/AR:ND



These vulnerabilities were reported by Joel Land of the CERT/CC.

This document was written by Joel Land.

Other Information

CVE IDs: CVE-2015-8263
Date Public: 2015-12-10
Date First Published: 2015-12-10
Date Last Updated: 2015-12-10 15:45 UTC
Document Revision: 6

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