CVE-2021-40654 : Exploit Details and Defense Strategies

This CVE-2021-40654 article provides details about an information disclosure issue in D-LINK-DIR-615 B2 2.01mt, allowing attackers to obtain login credentials.

Understanding CVE-2021-40654

This section delves into the specifics of CVE-2021-40654.

What is CVE-2021-40654?

The vulnerability entails an information disclosure flaw in D-LINK-DIR-615 B2 2.01mt, enabling malicious actors to acquire a username and password through a crafted post request to the /getcfg.php page.

The Impact of CVE-2021-40654

The security issue can lead to unauthorized access to sensitive login credentials, posing a significant risk to the affected systems' confidentiality and integrity.

Technical Details of CVE-2021-40654

Here, the technical aspects of CVE-2021-40654 are outlined.

Vulnerability Description

The vulnerability allows attackers to extract user credentials by manipulating the /getcfg.php page through a forged post request, opening avenues for unauthorized access.

Affected Systems and Versions

Product: D-LINK-DIR-615 B2 2.01mt
Vendor: D-LINK
Versions Affected: All versions are impacted

Exploitation Mechanism

The exploitation involves sending a specifically crafted post request to the vulnerable /getcfg.php page, tricking the system into divulging usernames and passwords.

Mitigation and Prevention

This section covers steps to mitigate and prevent exploitation of CVE-2021-40654.

Immediate Steps to Take

Apply security patches provided by D-LINK promptly.
Monitor network traffic for any suspicious activity, especially around the /getcfg.php page.
Consider changing the default credentials of the D-LINK-DIR-615 B2 router.

Long-Term Security Practices

Regularly update firmware to patch known vulnerabilities.
Implement strong password policies and consider two-factor authentication methods.

Patching and Updates

Stay informed about security bulletins from D-LINK.
Apply patches and updates as soon as they are released to safeguard against potential exploits.