CVE-2018-12103 : Security Advisory and Response

A vulnerability was found on D-Link DIR-890L, DIR-885L/R, and DIR-895L/R devices due to lack of authentication, allowing unauthorized access to the administrator's panel.

Understanding CVE-2018-12103

This CVE involves a security issue on specific D-Link router models that could lead to unauthorized login attempts.

What is CVE-2018-12103?

The vulnerability allows an attacker within the local network to access CAPTCHAs used by the access point and initiate unauthorized login attempts.

The Impact of CVE-2018-12103

The exploit enables attackers to bypass authentication and potentially gain unauthorized access to the router's administrator panel.

Technical Details of CVE-2018-12103

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

Vulnerability Description

The issue arises from the lack of authentication for accessing the administrator's panel through a specific URI, allowing attackers to obtain CAPTCHAs and attempt unauthorized logins.

Affected Systems and Versions

D-Link DIR-890L with firmware 1.21B02beta01 and earlier
D-Link DIR-885L/R with firmware 1.21B03beta01 and earlier
D-Link DIR-895L/R with firmware 1.21B04beta04 and earlier

Exploitation Mechanism

Attackers exploit the predictability of the URI to access CAPTCHAs, choose a specific CAPTCHA, and launch unauthorized login attempts.

Mitigation and Prevention

Protecting against and addressing the CVE-2018-12103 vulnerability.

Immediate Steps to Take

Update router firmware to the latest version
Restrict access to the router's local network
Monitor for any unauthorized login attempts

Long-Term Security Practices

Implement strong and unique passwords for router access
Regularly review and update router security settings

Patching and Updates

Regularly check for firmware updates from D-Link
Apply patches promptly to address known vulnerabilities