CVE-2021-23558 : Security Advisory and Response

This article provides details about CVE-2021-23558, a vulnerability related to Prototype Pollution in the bmoor package before version 0.10.1.

Understanding CVE-2021-23558

CVE-2021-23558, also known as Prototype Pollution, was reported on January 28, 2022, with a CVSS base score of 7.3.

What is CVE-2021-23558?

The package bmoor before version 0.10.1 is susceptible to Prototype Pollution due to inadequate sanitization in the set function. This vulnerability stemmed from an incomplete fix in CVE-2020-7736.

The Impact of CVE-2021-23558

With a CVSS base score of 7.3, this high-severity vulnerability can be exploited with a proof of concept. It can lead to a compromise in confidentiality, integrity, and availability of the affected system.

Technical Details of CVE-2021-23558

The following technical details outline the vulnerability in-depth:

Vulnerability Description

The vulnerability arises from missing sanitization in the set function, allowing attackers to manipulate the prototype of objects.

Affected Systems and Versions

The bmoor package before version 0.10.1 is impacted by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability through network access without requiring any privileges, making it a serious threat.

Mitigation and Prevention

To address CVE-2021-23558 and enhance system security, consider the following steps:

Immediate Steps to Take

Update the bmoor package to version 0.10.1 or later to patch the vulnerability.
Monitor for any suspicious activities that could indicate exploitation of the vulnerability.

Long-Term Security Practices

Regularly update software and libraries to their latest secure versions to prevent similar vulnerabilities.
Conduct routine security assessments and audits to identify and mitigate potential risks.

Patching and Updates

Stay informed about security advisories and patches released by the vendor to safeguard against emerging threats.