CVE-2023-43240 : What You Need to Know

D-Link DIR-816 A2 v1.10CNB05 was discovered to contain a stack overflow via parameter sip_address in ipportFilter.

Understanding CVE-2023-43240

This CVE describes a stack overflow vulnerability in D-Link DIR-816 A2 v1.10CNB05 that could be exploited via the parameter sip_address in ipportFilter.

What is CVE-2023-43240?

The CVE-2023-43240 vulnerability affects the D-Link DIR-816 A2 v1.10CNB05 router, potentially leading to a stack overflow by manipulating the sip_address parameter in ipportFilter.

The Impact of CVE-2023-43240

If successfully exploited, the stack overflow vulnerability in CVE-2023-43240 could allow an attacker to execute arbitrary code or crash the affected system, leading to a denial of service (DoS) condition.

Technical Details of CVE-2023-43240

This section provides further technical details on the vulnerability.

Vulnerability Description

The vulnerability arises from improper handling of user-supplied input in the sip_address parameter in ipportFilter, leading to a stack overflow.

Affected Systems and Versions

D-Link DIR-816 A2 v1.10CNB05 is confirmed to be affected by this vulnerability.

Exploitation Mechanism

An attacker can exploit this vulnerability by sending a crafted request containing a malicious sip_address value, triggering the stack overflow.

Mitigation and Prevention

To protect systems from CVE-2023-43240, immediate steps should be taken along with long-term security practices.

Immediate Steps to Take

Disable remote access to the affected device if not required
Implement network segmentation to limit exposure
Apply vendor-supplied patches or updates promptly

Long-Term Security Practices

Regularly update firmware and software on network devices
Conduct security assessments and penetration testing
Educate users on security best practices

Patching and Updates

Ensure to apply patches released by D-Link promptly to address the CVE-2023-43240 vulnerability.