CVE-2020-7673 : Security Advisory and Response

node-extend through 0.2.0 is vulnerable to Arbitrary Code Execution. User input provided to the argument

A

of

extend

function

(A,B,as,isAargs)

located within

lib/extend.js

is executed by the

eval

function, resulting in code execution.

Understanding CVE-2020-7673

node-extend through 0.2.0 is susceptible to Arbitrary Code Execution due to improper handling of user input.

What is CVE-2020-7673?

CVE-2020-7673 is a vulnerability in node-extend that allows attackers to execute arbitrary code by manipulating user input within the

extend

function.

The Impact of CVE-2020-7673

This vulnerability can lead to unauthorized execution of code, potentially compromising the security and integrity of the system.

Technical Details of CVE-2020-7673

node-extend vulnerability details and affected systems.

Vulnerability Description

Vulnerability Type: Arbitrary Code Execution
Location:

lib/extend.js

Execution Method:

eval

function

Affected Systems and Versions

Product: node-extend
Versions: All versions including 0.2.0

Exploitation Mechanism

Attackers exploit the

extend

function by injecting malicious code into the argument

A

, triggering code execution through the

eval

function.

Mitigation and Prevention

Protecting systems from CVE-2020-7673.

Immediate Steps to Take

Update node-extend to a patched version that addresses the vulnerability.
Avoid passing user-controlled input directly to functions that execute code.

Long-Term Security Practices

Implement input validation and sanitization to prevent code injection attacks.
Regularly monitor and update dependencies to mitigate potential vulnerabilities.

Patching and Updates

Stay informed about security patches and updates for node-extend to apply fixes promptly.