CVE-2021-20137 : Vulnerability Insights and Analysis

This CVE-2021-20137 article provides insights into a reflected cross-site scripting vulnerability found in the Gryphon Tower router, impacting versions <= 04.0004.12. Understand the implications, technical details, and mitigation strategies associated with this security issue.

Understanding CVE-2021-20137

CVE-2021-20137 involves a reflected cross-site scripting vulnerability in the Gryphon Tower router.

What is CVE-2021-20137?

The vulnerability exists in the url parameter of the /cgi-bin/luci/site_access/ page on the Gryphon Tower router's web interface. Attackers can exploit it by luring users to click on a maliciously crafted link, enabling JavaScript execution in the victim's browser.

The Impact of CVE-2021-20137

This vulnerability poses a significant risk as it allows attackers to execute arbitrary JavaScript code within a victim's browser, potentially leading to unauthorized actions, data theft, or further exploitation.

Technical Details of CVE-2021-20137

Gain insights into the technical aspects of CVE-2021-20137 below.

Vulnerability Description

The vulnerability is classified as a reflected cross-site scripting issue, enabling attackers to execute JavaScript code in the victim's browser without their consent.

Affected Systems and Versions

The Gryphon Tower router versions <= 04.0004.12 are impacted by this vulnerability, making them susceptible to exploitation.

Exploitation Mechanism

To exploit this vulnerability, attackers can manipulate the url parameter of the /cgi-bin/luci/site_access/ page to inject malicious script code and deceive users into triggering the payload.

Mitigation and Prevention

Explore the key steps to mitigate and prevent potential exploitation of CVE-2021-20137.

Immediate Steps to Take

Users of the affected Gryphon Tower router version should avoid clicking on unverified links, especially those received from unknown or suspicious sources.

Long-Term Security Practices

Implementing regular security audits, educating users about phishing attempts, and keeping systems up-to-date with security patches are crucial for enhancing overall cybersecurity posture.

Patching and Updates

It is essential for users to apply security patches provided by the vendor promptly to address the CVE-2021-20137 vulnerability and protect their systems from potential exploitation.