Vulnerability Note VU#403568
Netgear G54/N150 Wireless Router WNR1000v3 uses insufficiently random values for DNS queries
Original Release date: 10 Dec 2015 | Last revised: 10 Dec 2015

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:

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

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

Vendor Information (Learn More)

VendorStatusDate NotifiedDate UpdatedNetgear, Inc.Affected08 Oct 201510 Dec 2015If you are a vendor and your product is affected, let
us know.

CVSS Metrics (Learn More)

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

References

http://support.netgear.com/product/WNR1000v3

Credit

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:
10 Dec 2015

Date First Published:
10 Dec 2015

Date Last Updated:
10 Dec 2015

Document Revision:
6

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