CVE-2019-18993 : Security Advisory and Response

OpenWrt 18.06.4 is vulnerable to XSS attacks in the "New port forward" Name field of the cgi-bin/luci/admin/network/firewall/forwards URI, affecting devices like TP-Link Archer C7.

Understanding CVE-2019-18993

XSS vulnerabilities have been identified in OpenWrt 18.06.4, specifically in the "New port forward" Name field of the cgi-bin/luci/admin/network/firewall/forwards URI.

What is CVE-2019-18993?

This CVE refers to a cross-site scripting (XSS) vulnerability in OpenWrt 18.06.4 that allows attackers to inject malicious scripts into web pages viewed by other users.

The Impact of CVE-2019-18993

The vulnerability can be exploited to execute malicious scripts in the context of a user's browser, potentially leading to unauthorized actions or data theft.

Technical Details of CVE-2019-18993

OpenWrt 18.06.4 is susceptible to XSS attacks due to inadequate input validation in the "New port forward" Name field.

Vulnerability Description

The XSS vulnerability allows attackers to inject and execute malicious scripts in the web interface of OpenWrt 18.06.4.

Affected Systems and Versions

OpenWrt 18.06.4
Devices like TP-Link Archer C7

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious scripts into the Name field of the "New port forward" feature in the web interface.

Mitigation and Prevention

It is crucial to take immediate steps to mitigate the risks posed by CVE-2019-18993.

Immediate Steps to Take

Disable remote access to the web interface if not required
Regularly monitor for any unauthorized access or changes
Implement network-level protections such as firewalls

Long-Term Security Practices

Conduct regular security assessments and audits
Educate users about safe browsing practices and phishing awareness
Keep systems and firmware up to date to patch known vulnerabilities

Patching and Updates

Ensure that OpenWrt 18.06.4 is updated to the latest version that addresses the XSS vulnerability.