CVE-2020-7768 : Security Advisory and Response

The package grpc before 1.24.4 and the package @grpc/grpc-js before 1.1.8 are vulnerable to Prototype Pollution via loadPackageDefinition.

Understanding CVE-2020-7768

This CVE involves a vulnerability in the grpc and @grpc/grpc-js packages that can lead to Prototype Pollution.

What is CVE-2020-7768?

CVE-2020-7768 is a security vulnerability found in the grpc and @grpc/grpc-js packages, allowing attackers to exploit Prototype Pollution through the loadPackageDefinition function.

The Impact of CVE-2020-7768

The vulnerability has a CVSS base score of 7.5 (High severity) with a high impact on availability. It requires no privileges and has a proof-of-concept exploit code available.

Technical Details of CVE-2020-7768

This section provides more in-depth technical details of the CVE.

Vulnerability Description

The vulnerability in grpc and @grpc/grpc-js packages allows for Prototype Pollution via loadPackageDefinition.

Affected Systems and Versions

Package: grpc
Versions Affected: < 1.24.4
Package: @grpc/grpc-js
Versions Affected: < 1.1.8

Exploitation Mechanism

The vulnerability can be exploited through the loadPackageDefinition function, enabling attackers to manipulate object prototypes.

Mitigation and Prevention

To address CVE-2020-7768, follow these mitigation strategies:

Immediate Steps to Take

Update grpc to version 1.24.4 or higher.
Update @grpc/grpc-js to version 1.1.8 or newer.
Monitor for any suspicious activities on the affected packages.

Long-Term Security Practices

Regularly update packages to the latest versions.
Implement security scanning tools to detect vulnerabilities.

Patching and Updates

Apply official fixes provided by the package maintainers.