What is CVE-2018-20802?

CVE-2018-20802 is a vulnerability that allows a user authorized to perform database queries to trigger denial of service by issuing specially crafted queries with compound indexes affecting QueryPlanner.

Which versions of MongoDB Server are affected by CVE-2018-20802?

CVE-2018-20802 affects MongoDB Server v3.6 versions prior to 3.6.9 and v4.0 versions prior to 4.0.3.

How can CVE-2018-20802 be exploited?

CVE-2018-20802 can be exploited by a user authorized to perform database queries by issuing specially crafted queries with compound indexes affecting QueryPlanner.

What is the severity of CVE-2018-20802?

CVE-2018-20802 has a severity level of medium.

Is there a fix available for CVE-2018-20802?

Yes, a fix for CVE-2018-20802 is available in MongoDB Server v3.6.9 and v4.0.3.

Vulnerability/
CVE-2018-20802

medium

6.5

CWE

394

23/11/2020

30/11/2020

23/1/2024

CVE-2018-20802: Post-auth queries on compound index may crash mongod

First published: Mon Nov 23 2020(Updated: )

A user authorized to perform database queries may trigger denial of service by issuing specially crafted queries with compound indexes affecting QueryPlanner. This issue affects MongoDB Server v3.6 versions prior to 3.6.9 and MongoDB Server v4.0 versions prior to 4.0.3.

Credit: cna@mongodb.com cna@mongodb.com

Affected Software	Affected Version	How to fix
MongoDB MongoDB	>=3.6.0<3.6.9
MongoDB MongoDB	>=4.0.0<4.0.3

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Reference Links

https://jira.mongodb.org/browse/SERVER-36993

Frequently Asked Questions

What is CVE-2018-20802?
CVE-2018-20802 is a vulnerability that allows a user authorized to perform database queries to trigger denial of service by issuing specially crafted queries with compound indexes affecting QueryPlanner.
Which versions of MongoDB Server are affected by CVE-2018-20802?
CVE-2018-20802 affects MongoDB Server v3.6 versions prior to 3.6.9 and v4.0 versions prior to 4.0.3.
How can CVE-2018-20802 be exploited?
CVE-2018-20802 can be exploited by a user authorized to perform database queries by issuing specially crafted queries with compound indexes affecting QueryPlanner.
What is the severity of CVE-2018-20802?
CVE-2018-20802 has a severity level of medium.
Is there a fix available for CVE-2018-20802?
Yes, a fix for CVE-2018-20802 is available in MongoDB Server v3.6.9 and v4.0.3.

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canonical/mongodb mongodb
version/mongodb mongodb/3.6.0
version/mongodb mongodb/4.0.0

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