CVE-2021-20335 - CVE House
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Status published Medium CVE-2021-20335

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

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

MongoDB Inc.

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Affected Software

MongoDB Ops Manager
Vulnerable Versions:
4.2

Timeline

Official Publish: February 11th, 2021
Last Modified: September 17th, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Weaknesses (CWE)

CWE-319

MITRE ATT&CK TTPs

T1040 Network Sniffing
Collection
T1557 Adversary-in-the-Middle
Credential Access
T1552 Unsecured Credentials
Credential Access
T1078 Valid Accounts
Persistence
T1071 Application Layer Protocol
Command and Control