CVE-2019-19729 : Exploit Details and Defense Strategies

A vulnerability was found in the BSON ObjectID (bson-objectid) package version 1.3.0 for Node.js, allowing attackers to create improperly formed objectids by manipulating user-input data.

Understanding CVE-2019-19729

This CVE identifies a security issue in the BSON ObjectID package for Node.js that can be exploited by attackers to bypass formatting mechanisms.

What is CVE-2019-19729?

The vulnerability in the BSON ObjectID package version 1.3.0 for Node.js allows attackers to insert additional properties in user-input, leading to the creation of malformed objectids.

The Impact of CVE-2019-19729

The vulnerability enables attackers to evade the formatting mechanism by including extra properties in user-input, potentially leading to security breaches and unauthorized access.

Technical Details of CVE-2019-19729

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The issue arises from the ObjectID() function in the BSON ObjectID package, which prematurely terminates execution if it detects _bsontype==ObjectID in the user-input object, allowing objects with valid bsontype to bypass formatting.

Affected Systems and Versions

Package: BSON ObjectID (bson-objectid)
Version: 1.3.0

Exploitation Mechanism

Attackers can exploit the vulnerability by manipulating user-input data to include extra properties, tricking the BSON ObjectID package into creating improperly formed objectids.

Mitigation and Prevention

Protecting systems from CVE-2019-19729 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update the affected BSON ObjectID package to a patched version.
Implement input validation to sanitize user-input data.

Long-Term Security Practices

Regularly monitor for security updates and patches for all dependencies.
Conduct security audits and code reviews to identify and address vulnerabilities proactively.

Patching and Updates

Ensure that all software components, including the BSON ObjectID package, are regularly updated with the latest security patches to mitigate the risk of exploitation.