A Vulnerability in Multiple NETGEAR Products Could Allow for Arbitrary Code Execution

ITS Advisory Number: 
2021-148
Date(s) Issued: 
Thursday, November 18, 2021
Subject: 
A Vulnerability in Multiple NETGEAR Products Could Allow for Arbitrary Code Execution
Overview: 

A vulnerability has been discovered in multiple NETGEAR products, which could allow for arbitrary code execution. Successful exploitation of this vulnerability could allow for arbitrary code execution in the context of the root user. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

 

THREAT INTELLIGENCE:

GRIMM researchers are reported to have an exploit capable of compromising fully patched devices that are running the default configuration.

 

Systems Affected: 
  • NetGear AirCards prior to firmware version 1.0.0.62
  • NetGear Cable Modems prior to firmware version 2.1.3.5
  • NetGear DSL Modem Routers D7000v2 and D6220 prior to firmware version 1.0.0.76
  • NetGear DSL Modem Routers D6400 prior to firmware version 1.0.0.108
  • NetGear DSL Modem Routers D6400 prior to firmware version 1.0.0.126
  • NetGear Extenders EX3700 and EX3800 prior to firmware version 1.0.0.94
  • NetGear Extenders EX6120 and EX6130 prior to firmware version 1.0.0.66
  • NetGear Routers See NetGear release under references for full list of patched firmware versions.
RISK
GOVERNMENT
Large and medium government entities: 
High
Small government entities: 
Medium
BUSINESS
Large and medium business entities: 
High
Small business entities: 
Medium
Home Users: 
Low
Description: 

A vulnerability has been discovered in multiple NETGEAR products, which could allow for arbitrary code execution.  The specific flaw exists within the UPnP service, which listens on TCP port 5000 by default. When parsing the uuid request header, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length stack-based buffer.

 

Successful exploitation of this vulnerability could allow for arbitrary code execution in the context of the root user. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

 

Actions: 
  • After appropriate testing, immediately apply patches provided by NETGEAR to vulnerable system.
  • Apply the Principle of Least Privilege to all systems and services.