CVE-2017-18378 : Security Advisory and Response

A remote command execution vulnerability exists in NETGEAR ReadyNAS Surveillance versions prior to 1.4.3-17 x86 and 1.1.4-7 ARM due to improper handling of user input.

Understanding CVE-2017-18378

This CVE involves a security flaw in NETGEAR ReadyNAS Surveillance that allows remote attackers to execute arbitrary commands.

What is CVE-2017-18378?

This vulnerability arises from the lack of escaping the $_GET['uploaddir'] parameter, leading to remote command execution through the system() function in upgrade_handle.php.

The Impact of CVE-2017-18378

The vulnerability has a CVSS base score of 8.4, indicating a high severity issue with significant impacts on confidentiality, integrity, and availability of affected systems.

Technical Details of CVE-2017-18378

Vulnerability Description

The flaw allows attackers to execute arbitrary commands remotely by exploiting the $_GET['uploaddir'] parameter.

Affected Systems and Versions

NETGEAR ReadyNAS Surveillance versions prior to 1.4.3-17 x86
NETGEAR ReadyNAS Surveillance versions prior to 1.1.4-7 ARM

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the $_GET['uploaddir'] parameter to execute unauthorized commands remotely.

Mitigation and Prevention

Immediate Steps to Take

Update NETGEAR ReadyNAS Surveillance to version 1.4.3-17 x86 or 1.1.4-7 ARM to mitigate the vulnerability.
Monitor network traffic for any suspicious activities that could indicate exploitation attempts.

Long-Term Security Practices

Implement strict input validation mechanisms to prevent command injection vulnerabilities.
Regularly audit and update system configurations to enhance security posture.

Patching and Updates

Apply security patches provided by NETGEAR to address the vulnerability and enhance system security.