CVE-2018-20334 : Exploit Details and Defense Strategies

A vulnerability in ASUSWRT 3.0.0.4.384.20308 allows command injection through shell metacharacters in the fb_email parameter of the /start_apply.htm POST data, potentially leading to unauthorized access and control over the router.

Understanding CVE-2018-20334

This CVE identifies a security flaw in ASUSWRT 3.0.0.4.384.20308 that enables attackers to execute commands through specific POST data parameters.

What is CVE-2018-20334?

The vulnerability permits unauthorized individuals to manipulate the router by injecting commands via shell metacharacters in specific POST data fields.

The Impact of CVE-2018-20334

Exploitation of this vulnerability could result in attackers gaining control over the router and accessing its shell functionality, compromising network security.

Technical Details of CVE-2018-20334

This section delves into the technical aspects of the vulnerability.

Vulnerability Description

The flaw in ASUSWRT 3.0.0.4.384.20308 allows command injection through the fb_email parameter in the /start_apply.htm POST data, enabling unauthorized access and control.

Affected Systems and Versions

Product: ASUSWRT 3.0.0.4.384.20308
Vendor: ASUS
Version: All versions are affected

Exploitation Mechanism

Attackers exploit the vulnerability by inserting shell metacharacters in the fb_email parameter of the /start_apply.htm POST data, granting them unauthorized control over the router.

Mitigation and Prevention

Protecting systems from CVE-2018-20334 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by ASUS promptly.
Monitor network traffic for any suspicious activities.
Restrict access to the router's administration interface.

Long-Term Security Practices

Regularly update router firmware to address security vulnerabilities.
Implement strong password policies and enable firewall settings.
Conduct periodic security audits to identify and mitigate potential risks.

Patching and Updates

Stay informed about security advisories from ASUS and apply patches as soon as they are released.