CVE-2018-11714 : Exploit Details and Defense Strategies

A problem has been found on TP-Link TL-WR840N v5 00000005 0.9.1 3.16 v0001.0 Build 170608 Rel.58696n and TL-WR841N v13 00000013 0.9.1 4.16 v0001.0 Build 170622 Rel.64334n devices due to improper session handling on the /cgi/ folder or a /cgi file. An attacker can bypass authentication by sending a specific header.

Understanding CVE-2018-11714

This CVE identifies a vulnerability in TP-Link routers that allows attackers to perform actions without authentication.

What is CVE-2018-11714?

The vulnerability arises from improper session management on specific TP-Link router models, enabling unauthorized actions without authentication.

The Impact of CVE-2018-11714

Attackers can execute actions on affected devices without the need for authentication.
Unauthorized access to router settings and configurations.

Technical Details of CVE-2018-11714

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The issue stems from the mishandling of sessions on the /cgi/ folder or a /cgi file, allowing attackers to bypass authentication by sending a specific header.

Affected Systems and Versions

TP-Link TL-WR840N v5 00000005 0.9.1 3.16 v0001.0 Build 170608 Rel.58696n
TP-Link TL-WR841N v13 00000013 0.9.1 4.16 v0001.0 Build 170622 Rel.64334n

Exploitation Mechanism

Attackers exploit the vulnerability by sending a crafted header with specific content, enabling them to perform actions without authentication.

Mitigation and Prevention

Protecting systems from this vulnerability requires immediate actions and long-term security practices.

Immediate Steps to Take

Disable remote management on the affected routers.
Regularly monitor network traffic for suspicious activities.
Apply security patches provided by TP-Link.

Long-Term Security Practices

Implement strong and unique passwords for router access.
Keep router firmware up to date to address security vulnerabilities.

Patching and Updates

TP-Link may release firmware updates to address this vulnerability. Ensure timely installation of these patches to secure the devices.