What is CVE-2021-20330?

CVE-2021-20330 is a vulnerability that allows an attacker with basic CRUD permissions on a replicated collection to run the applyOps command with specially malformed oplog entries, resulting in a potential denial of service on secondaries.

What is the severity of CVE-2021-20330?

CVE-2021-20330 has a severity rating of medium with a score of 6.5.

How can I fix CVE-2021-20330?

To fix CVE-2021-20330, it is recommended to upgrade to MongoDB Server version 4.0.25 (or later) for v4.0, 4.2.14 (or later) for v4.2, or 4.4.6 (or later) for v4.4.

Where can I find more information about CVE-2021-20330?

You can find more information about CVE-2021-20330 on the MongoDB Jira page: https://jira.mongodb.org/browse/SERVER-36263.

Vulnerability/
CVE-2021-20330

medium

6.5

CWE

15/12/2021

23/1/2024

CVE-2021-20330: Specific replication command with malformed oplog entries can crash secondaries

Q: Which versions of MongoDB Server are affected by CVE-2021-20330?

CVE-2021-20330 affects MongoDB Server v4.0 versions prior to 4.0.25, MongoDB Server v4.2 versions prior to 4.2.14, and MongoDB Server v4.4 versions prior to 4.4.6.

First published: Wed Dec 15 2021(Updated: )

An attacker with basic CRUD permissions on a replicated collection can run the applyOps command with specially malformed oplog entries, resulting in a potential denial of service on secondaries. This issue affects MongoDB Server v4.0 versions prior to 4.0.25; MongoDB Server v4.2 versions prior to 4.2.14; MongoDB Server v4.4 versions prior to 4.4.6.

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

Affected Software	Affected Version	How to fix
MongoDB MongoDB	>=4.0.0<4.0.25
MongoDB MongoDB	>=4.2.0<4.2.14
MongoDB MongoDB	>=4.4.0<4.4.6

Remedy

https://jira.mongodb.org/browse/SERVER-36263

Never miss a vulnerability like this again

Reference Links

https://jira.mongodb.org/browse/SERVER-36263

Frequently Asked Questions

What is CVE-2021-20330?
CVE-2021-20330 is a vulnerability that allows an attacker with basic CRUD permissions on a replicated collection to run the applyOps command with specially malformed oplog entries, resulting in a potential denial of service on secondaries.
Which versions of MongoDB Server are affected by CVE-2021-20330?
CVE-2021-20330 affects MongoDB Server v4.0 versions prior to 4.0.25, MongoDB Server v4.2 versions prior to 4.2.14, and MongoDB Server v4.4 versions prior to 4.4.6.
What is the severity of CVE-2021-20330?
CVE-2021-20330 has a severity rating of medium with a score of 6.5.
How can I fix CVE-2021-20330?
To fix CVE-2021-20330, it is recommended to upgrade to MongoDB Server version 4.0.25 (or later) for v4.0, 4.2.14 (or later) for v4.2, or 4.4.6 (or later) for v4.4.
Where can I find more information about CVE-2021-20330?
You can find more information about CVE-2021-20330 on the MongoDB Jira page: https://jira.mongodb.org/browse/SERVER-36263.

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collector/nvd-index
agent/software-canonical-lookup-request
collector/nvd-api
source/NVD
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vendor/mongodb
canonical/mongodb mongodb
version/mongodb mongodb/4.0.0
version/mongodb mongodb/4.2.0
version/mongodb mongodb/4.4.0

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