CVE-2021-20330
Last modified
CVE-2021-20330 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 1.04% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mongodb | Mongodb | >= 4.0.0, < 4.0.25 |
| Mongodb | Mongodb | >= 4.2.0, < 4.2.14 |
| Mongodb | Mongodb | >= 4.4.0, < 4.4.6 |
References
- https://jira.mongodb.org/browse/SERVER-36263Issue Tracking, Patch, Vendor Advisory
- https://jira.mongodb.org/browse/SERVER-36263Issue Tracking, Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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