CVE-2020-36178 : Security Advisory and Response

TP-Link TL-WR840N 6_EU_0.9.1_4.16 devices are vulnerable to OS command injection due to a flaw in the oal_ipt_addBridgeIsolationRules function.

Understanding CVE-2020-36178

This CVE identifies a critical vulnerability in TP-Link TL-WR840N 6_EU_0.9.1_4.16 devices that allows attackers to execute arbitrary commands through a web interface input.

What is CVE-2020-36178?

The vulnerability in the oal_ipt_addBridgeIsolationRules function of TP-Link TL-WR840N 6_EU_0.9.1_4.16 devices enables malicious actors to inject OS commands by manipulating an IP address field.

The Impact of CVE-2020-36178

Exploitation of this vulnerability can lead to unauthorized command execution on affected devices, potentially compromising their security and integrity.

Technical Details of CVE-2020-36178

This section provides in-depth technical insights into the vulnerability.

Vulnerability Description

The flaw arises from using a raw string input directly in a system library function call, allowing attackers to execute commands through iptables.

Affected Systems and Versions

Product: TP-Link TL-WR840N 6_EU_0.9.1_4.16
Version: All versions are affected

Exploitation Mechanism

Attackers exploit the vulnerability by inserting malicious commands into the IP address field on the device's web interface, triggering unauthorized command execution.

Mitigation and Prevention

Protecting systems from CVE-2020-36178 requires immediate actions and long-term security measures.

Immediate Steps to Take

Disable remote access to the device if not required
Implement strong password policies
Regularly monitor network traffic for suspicious activities

Long-Term Security Practices

Keep devices up to date with the latest firmware releases
Conduct regular security audits and penetration testing
Educate users on safe browsing habits and security best practices

Patching and Updates

Apply security patches provided by TP-Link promptly
Stay informed about security advisories and updates from the vendor