CVE-2021-20335 SSL may be unexpectedly disabled during upgrade of multiple-server MongoDB Ops Manager

Medium 6.7 Published 11 Feb 2021 Updated 17 Sep 2024

An upgrade bug in MongoDB Ops Manager can temporarily disable SSL, exposing data if specific client certificate settings are enabled.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2021-20335?

CVE-2021-20335 is a medium-severity vulnerability in MongoDB Ops Manager, published on 11 Feb 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

For MongoDB Ops Manager versions prior to and including 4.2.24 with multiple OM application servers, that have SSL turned on for their MongoDB processes, the upgrade to MongoDB Ops Manager versions prior to and including 4.4.12 triggers a bug where Automation thinks SSL is being turned off, and can disable SSL temporarily for members of the cluster. This issue is temporary and eventually corrects itself after MongoDB Ops Manager instances have finished upgrading to MongoDB Ops Manager 4.4. In addition, customers must be running with clientCertificateMode=OPTIONAL / allowConnectionsWithoutCertificates=true to be impacted*.* Customers upgrading from Ops Manager 4.2.X to 4.2.24 and finally to Ops Manager 4.4.13+ are unaffected by this issue.

Weakness: CWE-319

Which versions are affected by CVE-2021-20335?

It affects 1 product.

Products include Mongodb Ops Manager.

How do I fix CVE-2021-20335?

No fix has been published for CVE-2021-20335 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-20335 being exploited?

There is no known exploitation of CVE-2021-20335 in the wild and no public exploit code.

Sources

Also known as GHSA-4hh4-3rxm-gq3h.