CVE-2020-14076 Explained : Impact and Mitigation

TRENDnet TEW-827DRU devices through 2.06B04 contain a stack-based buffer overflow in the ssi binary, allowing an authenticated user to execute arbitrary code by POSTing to apply.cgi via specific actions.

Understanding CVE-2020-14076

This CVE involves a critical vulnerability in TRENDnet TEW-827DRU devices that could lead to unauthorized code execution.

What is CVE-2020-14076?

The vulnerability in TRENDnet TEW-827DRU devices allows an authenticated user to execute arbitrary code by exploiting a stack-based buffer overflow in the ssi binary.

The Impact of CVE-2020-14076

The overflow enables attackers to execute malicious code by sending crafted POST requests to apply.cgi using specific actions.

Technical Details of CVE-2020-14076

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

Vulnerability Description

The stack-based buffer overflow in the ssi binary of TRENDnet TEW-827DRU devices through 2.06B04 allows for unauthorized code execution.

Affected Systems and Versions

Product: TRENDnet TEW-827DRU
Versions affected: Through 2.06B04

Exploitation Mechanism

Attackers can exploit this vulnerability by POSTing to apply.cgi via actions like st_dev_connect, st_dev_disconnect, or st_dev_rconnect with a long wan_type key.

Mitigation and Prevention

Protecting systems from CVE-2020-14076 is crucial to prevent unauthorized access and code execution.

Immediate Steps to Take

Apply vendor-supplied patches promptly.
Monitor network traffic for any suspicious activity.
Restrict access to vulnerable devices.

Long-Term Security Practices

Regularly update firmware and software to patch known vulnerabilities.
Conduct security assessments and penetration testing.

Patching and Updates

Check for security advisories from TRENDnet and apply patches as soon as they are available.