Rule Category

SERVER-WEBAPP -- Snort has detected traffic exploiting vulnerabilities in web based applications on servers.

Alert Message

SERVER-WEBAPP Netgear R8500 multiple parameters command injection attempt

Rule Explanation

This rule specifically looks for the injection of commands to the Netgear R8500 series' sysNewPasswd= and sysConfirmPasswd= parameters. This will stop those attempts.

What To Look For

This rule will alert when an attempt to perform a command injection attack against a Netgear device.

Known Usage

Public information/Proof of Concept available

False Positives

No known false positives


Cisco Talos Intelligence Group

Rule Groups

No rule groups


Rule Vulnerability

Command Injection

Command Injection attacks target applications that allow unsafe user-supplied input. Attackers transmit this input via forms, cookies, HTTP headers, etc. and exploit the applications permissions to execute system commands without injecting code.

CVE Additional Information

NETGEAR R8500 devices allow remote authenticated users to execute arbitrary commands (such as telnetd) via shell metacharacters in the sysNewPasswd and sysConfirmPasswd parameters to admin_account.cgi.
Severity Base Score8.8
Impact Score5.9 Exploit Score2.8
Confidentiality ImpactHIGH Integrity ImpactHIGH
Availability ImpactHIGH Attack VectorNETWORK
ScopeUNCHANGED User InteractionNONE
Authentication Ease of AccessLOW
Privileges RequiredLOW

MITRE ATT&CK Framework

Tactic: Initial Access

Technique: Exploit Public-Facing Application

For reference, see the MITRE ATT&CK vulnerability types here: