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

Overview

Netgear G54/N150 Wireless Router WNR1000v3, firmware version 1.0.2.68 and possibly earlier, uses insufficiently random values for DNS queries and is vulnerable to DNS spoofing attacks.

Description

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:

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Impact

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

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Solution

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

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Vendor Information

403568

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Netgear, Inc. Affected

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

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

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

CVSS Metrics

Group	Score	Vector
Base	5	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

References

<http://support.netgear.com/product/WNR1000v3&gt;

Acknowledgements

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: