CVE-2021-39187 : Vulnerability Insights and Analysis

Parse Server prior to version 4.10.3 crashes due to a vulnerability when handling query requests with an invalid value for the

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option.

Understanding CVE-2021-39187

Parse Server, an open-source backend compatible with Node.js infrastructure, suffers from a critical issue causing crashes.

What is CVE-2021-39187?

The vulnerability in Parse Server results in crashes when processing query requests with erroneous

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option values due to a bug in the MongoDB Node.js driver.

The Impact of CVE-2021-39187

The vulnerability has a CVSS base score of 7.5 (High) with a network-based attack vector and high availability impact. It falls under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component).

Technical Details of CVE-2021-39187

Parse Server's vulnerability and affected systems are detailed below.

Vulnerability Description

The flaw in Parse Server causes crashes, making it unable to handle query requests containing an invalid

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option.

Affected Systems and Versions

Product: parse-server
Vendor: parse-community
Versions Affected: < 4.10.3

Exploitation Mechanism

The issue is triggered when a query request with an invalid value for the

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option is processed, leading to crashes.

Mitigation and Prevention

Actions to secure systems and prevent exploits of CVE-2021-39187.

Immediate Steps to Take

Upgrade Parse Server to version 4.10.3 to apply the patch.

Long-Term Security Practices

Regularly update Parse Server and associated components.

Patching and Updates

Apply the patch provided in Parse Server version 4.10.3 to mitigate the vulnerability.