CVE-2021-20333

Publication date 23 July 2021

Last updated 18 February 2026

Ubuntu priority

Cvss 3 Severity Score

Description

Sending specially crafted commands to a MongoDB Server may result in artificial log entries being generated or for log entries to be split. This issue affects MongoDB Server v3.6 versions prior to 3.6.20; MongoDB Server v4.0 versions prior to 4.0.21 and MongoDB Server v4.2 versions prior to 4.2.10.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
mongodb	25.10 questing	Not in release
	25.04 plucky	Not in release
	24.10 oracular	Not in release
	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.10 kinetic	Not in release
	22.04 LTS jammy	Not in release
	21.10 impish	Not in release
	21.04 hirsute	Not in release
	20.04 LTS focal	Vulnerable, fix deferred
	18.04 LTS bionic	Vulnerable, fix deferred
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected

Notes

john-breton

Patches were released after the switch to SSPL upstream, as such we cannot use them to patch Ubuntu releases. The hope is a license-compliant third-party will make patches available in the future.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
mongodb	Upstream: cd8cce6 Upstream: 40327ae Upstream: 78a2695 Upstream: 001aed0

Severity score breakdown

Parameter	Value
Base score	5.3 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	Low
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N