CVE-2020-7644 : Exploit Details and Defense Strategies

fun-map through 3.3.1 is vulnerable to Prototype Pollution. The function assocInM could be tricked into adding or modifying properties of 'Object.prototype' using a 'proto' payload.

Understanding CVE-2020-7644

fun-map through version 3.3.1 is susceptible to a Prototype Pollution vulnerability that could allow an attacker to manipulate properties of 'Object.prototype'.

What is CVE-2020-7644?

CVE-2020-7644 is a security vulnerability in fun-map versions up to 3.3.1 that enables Prototype Pollution. By exploiting the assocInM function, an attacker could alter or insert properties into 'Object.prototype' using a 'proto' payload.

The Impact of CVE-2020-7644

This vulnerability could lead to unauthorized property modifications in 'Object.prototype', potentially resulting in code execution, data manipulation, or denial of service attacks.

Technical Details of CVE-2020-7644

fun-map's vulnerability to Prototype Pollution has the following technical aspects:

Vulnerability Description

The issue arises from the assocInM function's susceptibility to 'proto' payloads, allowing unauthorized modifications to 'Object.prototype'.

Affected Systems and Versions

Product: fun-map
Vendor: Not applicable
Versions affected: All versions including 3.3.1

Exploitation Mechanism

Attackers can exploit the assocInM function to manipulate 'Object.prototype' properties using 'proto' payloads, leading to potential security breaches.

Mitigation and Prevention

To address CVE-2020-7644 and enhance security:

Immediate Steps to Take

Update fun-map to a patched version that addresses the Prototype Pollution vulnerability.
Implement input validation to prevent malicious payloads.
Monitor and restrict access to sensitive objects and prototypes.

Long-Term Security Practices

Regularly update software components to mitigate known vulnerabilities.
Conduct security audits and code reviews to identify and address potential security flaws.

Patching and Updates

Stay informed about security advisories and patches released by the fun-map project.
Apply updates promptly to ensure protection against known vulnerabilities.