CVE-2023-41559 : Exploit Details and Defense Strategies

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 were discovered to contain a stack overflow vulnerability via parameter page at url /goform/NatStaticSetting.

Understanding CVE-2023-41559

This CVE identifies a stack overflow vulnerability in Tenda AC7, AC9, and AC5 routers when accessing the parameter page at /goform/NatStaticSetting.

What is CVE-2023-41559?

CVE-2023-41559 highlights a vulnerability in Tenda routers that could allow attackers to execute arbitrary code or crash the system by overrunning the available memory.

The Impact of CVE-2023-41559

The impact of this vulnerability is severe, potentially leading to unauthorized remote access, denial of service, or complete system compromise on affected Tenda router models.

Technical Details of CVE-2023-41559

This section delves into the specifics of the vulnerability affecting Tenda routers.

Vulnerability Description

The vulnerability involves a stack overflow in the routers' handling of parameters at the /goform/NatStaticSetting URL, which can be exploited by an attacker to trigger a DoS condition or execute malicious code.

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 impacted by this vulnerability.

Exploitation Mechanism

The exploitation of this vulnerability involves sending specially crafted requests to the affected routers, exploiting the stack overflow to achieve the attacker's objectives.

Mitigation and Prevention

To address CVE-2023-41559, immediate actions and long-term security measures are crucial.

Immediate Steps to Take

Disable remote management on the affected Tenda routers to reduce the attack surface.
Implement network-level protections such as firewalls to block malicious traffic.

Long-Term Security Practices

Regularly update the firmware of Tenda routers to patch known vulnerabilities.
Conduct security assessments and penetration testing to identify and mitigate potential risks.

Patching and Updates

Keep track of security advisories from Tenda and apply patches promptly to secure the devices against CVE-2023-41559.