CVE-2018-14559 : Exploit Details and Defense Strategies

A vulnerability has been identified in Tenda AC7, AC9, and AC10 devices that could lead to a buffer overflow due to a flaw in the web server.

Understanding CVE-2018-14559

This CVE pertains to a buffer overflow vulnerability in Tenda routers' web server, potentially allowing attackers to execute malicious code.

What is CVE-2018-14559?

The vulnerability exists in Tenda AC7, AC9, and AC10 devices' web server, allowing attackers to trigger a buffer overflow by manipulating list parameters in a post request.

The Impact of CVE-2018-14559

Exploitation of this vulnerability could lead to remote code execution, compromising the security and integrity of the affected devices.

Technical Details of CVE-2018-14559

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The flaw in the web server's httpd component allows attackers to overwrite the return address of a function, causing a buffer overflow when processing list parameters.

Affected Systems and Versions

Tenda AC7 devices with firmware up to V15.03.06.44_CN(AC7)
Tenda AC9 devices with firmware up to V15.03.05.19(6318)_CN(AC9)
Tenda AC10 devices with firmware up to V15.03.06.23_CN(AC10)

Exploitation Mechanism

By sending crafted list parameters in a post request, attackers can manipulate the value written to a local variable, leading to a buffer overflow and potential code execution.

Mitigation and Prevention

Protecting systems from CVE-2018-14559 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update the firmware of Tenda AC7, AC9, and AC10 devices to versions that address the buffer overflow vulnerability.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

Regularly update firmware and security patches for all network devices.
Conduct security assessments and penetration testing to identify and address vulnerabilities proactively.

Patching and Updates

Tenda has released patches to address the buffer overflow vulnerability in the affected devices. Ensure timely application of these patches to mitigate the risk of exploitation.