CVE-2019-9974 : Exploit Details and Defense Strategies

DASAN H660RM GPON routers with firmware version 1.03-0022 have a vulnerability in the diag_tool.cgi script that allows remote attackers to execute a ping command without authorization, potentially leading to a Denial of Service (DoS) attack.

Understanding CVE-2019-9974

This CVE involves a security vulnerability in DASAN H660RM GPON routers that can be exploited by attackers to launch DoS attacks.

What is CVE-2019-9974?

The vulnerability in the diag_tool.cgi script of DASAN H660RM GPON routers with firmware version 1.03-0022 allows unauthorized remote users to execute a ping command via a GET request, enabling potential DoS attacks.

The Impact of CVE-2019-9974

Exploiting this vulnerability can lead to unauthorized execution of a ping command, potentially causing a DoS attack and crashing the router. Attackers could use this to gather information about LAN devices.

Technical Details of CVE-2019-9974

This section provides technical insights into the vulnerability.

Vulnerability Description

The diag_tool.cgi script in DASAN H660RM GPON routers lacks authorization checks, enabling remote attackers to run a ping command through a GET request.

Affected Systems and Versions

Product: DASAN H660RM GPON routers
Firmware Version: 1.03-0022

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a GET request to the diag_tool.cgi script, allowing them to execute a ping command without any authorization.

Mitigation and Prevention

Protecting systems from CVE-2019-9974 requires immediate actions and long-term security practices.

Immediate Steps to Take

Disable remote access to the affected router if not required.
Monitor network traffic for any suspicious activity.
Apply vendor-supplied patches or updates promptly.

Long-Term Security Practices

Regularly update router firmware to the latest version.
Implement strong authentication mechanisms for remote access.
Conduct security audits and penetration testing regularly.

Patching and Updates

Check for firmware updates from the router vendor regularly.
Apply patches or updates provided by the vendor to address the vulnerability effectively.