CVE-2020-10827 : Vulnerability Insights and Analysis

A stack-based buffer overflow vulnerability in apmd on Draytek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1 allows remote attackers to execute arbitrary code via a malicious HTTP request.

Understanding CVE-2020-10827

This CVE identifies a critical security issue in specific Draytek devices that could lead to remote code execution.

What is CVE-2020-10827?

The vulnerability is a stack-based buffer overflow in the apmd service on Draytek Vigor3900, Vigor2960, and Vigor300B devices, enabling attackers to trigger code execution by sending a crafted HTTP request.

The Impact of CVE-2020-10827

Exploitation of this vulnerability could result in unauthorized remote code execution on the affected Draytek devices, potentially leading to a complete compromise of the device and network.

Technical Details of CVE-2020-10827

This section delves into the technical aspects of the CVE.

Vulnerability Description

The vulnerability arises from a stack-based buffer overflow in the apmd service, allowing attackers to inject and execute malicious code remotely.

Affected Systems and Versions

Draytek Vigor3900, Vigor2960, and Vigor300B devices before version 1.5.1 are impacted.

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a specifically crafted HTTP request to the affected devices, triggering the buffer overflow and executing arbitrary code.

Mitigation and Prevention

Protecting systems from CVE-2020-10827 is crucial to prevent potential security breaches.

Immediate Steps to Take

Update the affected Draytek devices to version 1.5.1 or later to mitigate the vulnerability.
Implement network segmentation to limit the impact of potential attacks.

Long-Term Security Practices

Regularly monitor and update all network-connected devices to ensure they are running the latest firmware and security patches.
Conduct security assessments and penetration testing to identify and address vulnerabilities proactively.

Patching and Updates

Draytek has released version 1.5.1 to address the vulnerability. Ensure all affected devices are promptly updated to this version to eliminate the risk of exploitation.