CVE-2019-19507 : Vulnerability Insights and Analysis

The compareCommon() function in jpv (Json Pattern Validator) version 2.1.1 and earlier can be bypassed due to the ability to overwrite specific internal attributes with conflicting names, impacting the validate() function.

Understanding CVE-2019-19507

This CVE involves a vulnerability in the jpv library that allows for manipulation of type detection through overwriting internal attributes.

What is CVE-2019-19507?

In jpv (Json Pattern Validator) before version 2.1.1, the compareCommon() function can be bypassed by overwriting internal attributes with conflicting names, leading to a manipulated result in type detection.

The Impact of CVE-2019-19507

The vulnerability allows for a crafted payload to overwrite a built-in attribute, affecting the type detection result and potentially enabling malicious actors to manipulate the outcome.

Technical Details of CVE-2019-19507

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The compareCommon() function in jpv can be exploited by overwriting specific internal attributes, such as 'constructor': {'name':'Array'}, impacting the validate() function.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: jpv version 2.1.1 and earlier

Exploitation Mechanism

The issue arises from the ability to overwrite internal attributes with conflicting names, allowing for a manipulated result in type detection.

Mitigation and Prevention

To address CVE-2019-19507, follow these mitigation strategies:

Immediate Steps to Take

Update jpv to version 2.1.1 or later to mitigate the vulnerability.
Monitor for any unusual activities that could indicate exploitation of the vulnerability.

Long-Term Security Practices

Regularly update software libraries and dependencies to patch known vulnerabilities.
Implement secure coding practices to prevent similar issues in the future.

Patching and Updates

Apply patches and updates provided by the jpv library to fix the vulnerability and enhance security measures.