CVE-2023-45576 Explained : Impact and Mitigation

A Buffer Overflow vulnerability has been identified in D-Link devices, exposing several models to remote code execution.

Understanding CVE-2023-45576

This CVE references a critical security issue impacting multiple D-Link device models, potentially allowing attackers to execute arbitrary code remotely.

What is CVE-2023-45576?

The CVE-2023-45576 involves a Buffer Overflow vulnerability found in D-Link device models DI-7003GV2.D1, DI-7100G+V2.D1, DI-7100GV2.D1, DI-7200G+V2.D1, DI-7200GV2.E1, DI-7300G+V2.D1, and DI-7400G+V2.D1. This flaw enables a remote attacker to execute malicious code using a specific parameter of the upnp_ctrl.asp function.

The Impact of CVE-2023-45576

The impact of this vulnerability is severe as it allows attackers to execute code remotely on affected D-Link devices, potentially leading to unauthorized access, data theft, or further compromise of the device and network.

Technical Details of CVE-2023-45576

This section provides more insight into the vulnerability, affected systems, and the exploitation mechanism.

Vulnerability Description

The Buffer Overflow vulnerability in the specified D-Link devices arises from improper input validation of the remove_ext_proto/remove_ext_port parameter in the upnp_ctrl.asp function, enabling attackers to overwrite the memory buffer and execute arbitrary code.

Affected Systems and Versions

The affected devices include DI-7003GV2.D1, DI-7100G+V2.D1, DI-7100GV2.D1, DI-7200G+V2.D1, DI-7200GV2.E1, DI-7300G+V2.D1, and DI-7400G+V2.D1 running versions up to specific releases before the identified patches.

Exploitation Mechanism

Attackers can exploit this vulnerability by sending specially crafted requests containing malicious data to the vulnerable parameter, triggering the Buffer Overflow and gaining unauthorized access to execute arbitrary code remotely.

Mitigation and Prevention

Discover how to protect your systems from the CVE-2023-45576 vulnerability and minimize the associated risks.

Immediate Steps to Take

Update the firmware of affected D-Link devices to the latest patched versions provided by the vendor.
Implement network segmentation and access controls to restrict unauthorized access to vulnerable devices.

Long-Term Security Practices

Regularly monitor vendor security advisories and apply updates promptly to address known vulnerabilities.
Conduct security assessments and penetration testing to identify and mitigate potential security weaknesses proactively.

Patching and Updates

Stay informed about security patches and updates released by D-Link for the affected device models. Apply patches promptly to mitigate the risk of exploitation.