Security Advisory for Post-Authentication Stack Overflow on Some Routers and Modem Routers

Overview :

Certain NETGEAR devices are affected by a stack-based buffer overflow by an authenticated user. This affects D6100 before 1.0.0.60, D3600 before 1.0.0.75, D6000 before 1.0.0.75, R9000 before 1.0.4.26, R8900 before 1.0.4.26, R7800 before 1.0.2.52, WNDR4500v3 before 1.0.0.58, WNDR4300v2 before 1.0.0.58, WNDR4300 before 1.0.2.104, WNDR3700v4 before 1.0.2.102, and WNR2000v5 before 1.0.0.66.

CVE-2019-20767

Security Advisory for Post-Authentication Stack Overflow on Some Routers and Modem Routers, PSV-2018-0116

Associated CVE IDs: None

NETGEAR has released fixes for a post-authentication stack overflow security vulnerability on the following product models:

D6100, running firmware versions prior to 1.0.0.60
D3600, running firmware versions prior to 1.0.0.75
D6000, running firmware versions prior to 1.0.0.75
R9000, running firmware versions prior to 1.0.4.26
R8900, running firmware versions prior to 1.0.4.26
R7800, running firmware versions prior to 1.0.2.52
WNDR4500v3, running firmware versions prior to 1.0.0.58
WNDR4300v2, running firmware versions prior to 1.0.0.58
WNDR4300, running firmware versions prior to 1.0.2.104
WNDR3700v4, running firmware versions prior to 1.0.2.102
WNR2000v5, running firmware versions prior to 1.0.0.66

NETGEAR strongly recommends that you download the latest firmware as soon as possible.

To download the latest firmware for your NETGEAR product:

Visit NETGEAR Support.
Start typing your model number in the search box, then select your model from the drop-down menu as soon as it appears.
If you do not see a drop-down menu, make sure that you entered your model number correctly, or select a product category to browse for your product model.
Click Downloads.
Under Current Versions, select the download whose title begins with Firmware Version.
Click Download.
Follow the instructions in your product’s user manual, firmware release notes, or product support page to install the new firmware.

Disclaimer

This document is provided on an “as is” basis and does not imply any kind of guarantee or warranty, including the warranties of merchantability or fitness for a particular use. Your use of the information in the document or materials linked from the document is at your own risk. NETGEAR reserves the right to change or update this document at any time. NETGEAR expects to update this document as new information becomes available.

The post-authentication stack overflow vulnerability remains if you do not complete all recommended steps. NETGEAR is not responsible for any consequences that could have been avoided by following the recommendations in this notification.

Acknowledgements

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Common Vulnerability Scoring System

CVSS v3 Rating: Medium

CVSS v3 Score: 6.8

Vector: CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Contact

We appreciate and value having security concerns brought to our attention. NETGEAR constantly monitors for both known and unknown threats. Being pro-active rather than re-active to emerging security issues is fundamental for product support at NETGEAR.

It is NETGEAR’s mission to be the innovative leader in connecting the world to the internet. To achieve this mission, we strive to earn and maintain the trust of those that use NETGEAR products for their connectivity.

To report a security vulnerability, visit http://www.netgear.com/about/security/.

If you are a NETGEAR customer with a security-related support concern, you can contact NETGEAR customer support at techsupport.security@netgear.com.

Revision History

2019-03-11: Published advisory