CVE-2021-20330

Specific replication command with malformed oplog entries can crash secondaries

State: Published
Severity: 6.5 Medium
Published: Dec 15, 2021
Updated: Sep 16, 2024
Reserved: Dec 17, 2020

Description

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 4.0.27; MongoDB Server v4.2 versions prior to 4.2.16; MongoDB Server v4.4 versions prior to 4.4.9.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	mongodb

Weaknesses

CWE-20 Improper Input Validation

Affected Products

Product	Versions
MongoDB ServerMongoDB Inc.	4.0 to before 4.0.27Affected 4.2 to before 4.2.16Affected 4.4 to before 4.4.9Affected

References

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

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.