CVE-2020-6765 : What You Need to Know

D-Link DSL-GS225 J1 AU_1.0.4 devices allow an admin to execute OS commands by placing shell metacharacters after a supported CLI command, as demonstrated by ping -c1 127.0.0.1; cat/etc/passwd. The CLI is reachable by TELNET.

Understanding CVE-2020-6765

This CVE involves a vulnerability in D-Link DSL-GS225 J1 AU_1.0.4 devices that allows unauthorized execution of OS commands.

What is CVE-2020-6765?

The vulnerability in D-Link DSL-GS225 J1 AU_1.0.4 devices enables an admin to execute OS commands by inserting shell metacharacters after a supported CLI command.

The Impact of CVE-2020-6765

This vulnerability can be exploited by attackers to execute unauthorized commands on affected devices, potentially leading to unauthorized access and control.

Technical Details of CVE-2020-6765

The technical aspects of the vulnerability are as follows:

Vulnerability Description

Admins can execute OS commands by adding shell metacharacters after a supported CLI command.

Affected Systems and Versions

Product: D-Link DSL-GS225 J1 AU_1.0.4
Version: n/a

Exploitation Mechanism

Attackers can leverage the vulnerability by using TELNET to access the CLI and inserting malicious commands.

Mitigation and Prevention

To address CVE-2020-6765, consider the following steps:

Immediate Steps to Take

Disable TELNET access to the CLI on affected devices.
Implement strong password policies for device access.

Long-Term Security Practices

Regularly update firmware to patch known vulnerabilities.
Monitor network traffic for any suspicious activities.

Patching and Updates

Check for firmware updates from D-Link and apply patches promptly to mitigate the vulnerability.