CVE-2022-27289 : Exploit Details and Defense Strategies

D-Link DIR-619 Ax v1.00 was discovered to contain a stack overflow vulnerability in the function formSetWanL2TP, allowing attackers to trigger a Denial of Service (DoS) by exploiting the curTime parameter.

Understanding CVE-2022-27289

This CVE identifies a specific vulnerability in the D-Link DIR-619 Ax v1.00 router that can be exploited to carry out a DoS attack.

What is CVE-2022-27289?

The CVE-2022-27289 vulnerability involves a stack overflow issue found in the formSetWanL2TP function of the D-Link DIR-619 Ax v1.00 router. This security flaw enables malicious actors to disrupt the normal functioning of the router by causing a DoS.

The Impact of CVE-2022-27289

The impact of this vulnerability is significant as it can lead to a complete Denial of Service (DoS) on the affected D-Link DIR-619 Ax v1.00 routers. Attackers can exploit this weakness to disrupt network connectivity and potentially cause downtime for users.

Technical Details of CVE-2022-27289

Below are the technical details related to the CVE-2022-27289 vulnerability.

Vulnerability Description

The stack overflow vulnerability in the function formSetWanL2TP in D-Link DIR-619 Ax v1.00 can be abused by attackers to execute a DoS attack by manipulating the curTime parameter.

Affected Systems and Versions

The affected product is the D-Link DIR-619 Ax v1.00 router. The specific impacted version is v1.00.

Exploitation Mechanism

Exploiting this vulnerability requires sending malicious input to the curTime parameter, triggering a stack overflow and leading to a DoS condition.

Mitigation and Prevention

To address CVE-2022-27289, the following mitigation strategies and preventive measures can be implemented:

Immediate Steps to Take

Update the D-Link DIR-619 Ax v1.00 router firmware to the latest version provided by the manufacturer.
Apply firewall rules to restrict access to the router from untrusted sources.
Monitor network traffic for any suspicious activity that could indicate an ongoing attack.

Long-Term Security Practices

Regularly check for firmware updates and security advisories from D-Link.
Implement network segmentation to contain potential attacks and limit the impact of security breaches.

Patching and Updates

Stay informed about security patches released by D-Link for the DIR-619 Ax v1.00 router and ensure timely installation of updates to protect against known vulnerabilities.