CVE-2018-20056 Explained : Impact and Mitigation

A vulnerability has been found in the /bin/boa file of D-Link DIR-619L Rev.B 2.06B1 and DIR-605L Rev.B 2.12B1 devices, allowing unauthorized remote attackers to execute arbitrary code.

Understanding CVE-2018-20056

This CVE involves a stack-based buffer overflow in specific D-Link devices, enabling attackers to exploit a parameter without authentication.

What is CVE-2018-20056?

The vulnerability in /bin/boa on D-Link DIR-619L Rev.B 2.06B1 and DIR-605L Rev.B 2.12B1 devices allows remote execution of arbitrary code.

The Impact of CVE-2018-20056

Unauthorized remote attackers can exploit the vulnerability to execute arbitrary code without authentication, posing a significant security risk to affected devices.

Technical Details of CVE-2018-20056

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The issue involves a stack-based buffer overflow in the /bin/boa file, specifically in the goform/formLanguageChange currTime parameter.

Affected Systems and Versions

D-Link DIR-619L Rev.B 2.06B1
D-Link DIR-605L Rev.B 2.12B1

Exploitation Mechanism

Attackers can exploit the vulnerability by manipulating the goform/formLanguageChange currTime parameter, allowing them to execute arbitrary code remotely.

Mitigation and Prevention

Protecting systems from CVE-2018-20056 requires immediate actions and long-term security measures.

Immediate Steps to Take

Apply security patches provided by D-Link promptly.
Implement network segmentation to limit exposure.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update firmware and software to address security vulnerabilities.
Conduct security assessments and penetration testing to identify weaknesses.

Patching and Updates

Ensure that all affected devices are updated with the latest firmware and security patches to mitigate the risk of exploitation.