CVE-2023-41556 Explained : Impact and Mitigation

A stack overflow vulnerability has been discovered in Tenda AC7 V1.0 V15.03.06.44, Tenda AC9 V3.0 V15.03.06.42_multi, and Tenda AC5 V1.0RTL_V15.03.06.28 when processing the parameter list at the URL /goform/SetIpMacBind.

Understanding CVE-2023-41556

This CVE identifies a critical stack overflow issue in multiple Tenda router models, potentially allowing attackers to execute arbitrary code or crash the affected device.

What is CVE-2023-41556?

The CVE-2023-41556 vulnerability involves a stack overflow triggered by processing a maliciously crafted parameter list at a specific URL, which could lead to a denial of service or arbitrary code execution.

The Impact of CVE-2023-41556

If successfully exploited, this vulnerability could result in a complete system compromise, unauthorized access to sensitive information, or disruption of network services.

Technical Details of CVE-2023-41556

This section delves into the specifics of the vulnerability, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability arises due to insufficient input validation in the parameter list processing function, leading to a stack overflow condition that could be exploited by remote attackers.

Affected Systems and Versions

Tenda AC7 V1.0 V15.03.06.44, Tenda AC9 V3.0 V15.03.06.42_multi, and Tenda AC5 V1.0RTL_V15.03.06.28 are confirmed to be affected by this vulnerability, potentially putting users of these models at risk.

Exploitation Mechanism

By sending a specially crafted parameter list to the URL /goform/SetIpMacBind, threat actors could trigger the stack overflow, enabling them to compromise the device.

Mitigation and Prevention

Discover the immediate steps to take and long-term security practices to protect against CVE-2023-41556.

Immediate Steps to Take

It is recommended to apply security patches provided by Tenda promptly to mitigate the risk of exploitation. Additionally, restricting network access to vulnerable devices can limit exposure to potential attacks.

Long-Term Security Practices

Implementing network segmentation, regular security audits, and keeping systems up to date with the latest firmware can help bolster overall cybersecurity posture.

Patching and Updates

Stay informed about security updates from Tenda and ensure that all affected devices are patched with the latest firmware to address the CVE-2023-41556 vulnerability.