CVE-2020-7921 : Improper serialization of internal state in the authorization subsystem in Mongo

Improper serialization of internal state in the authorization subsystem in MongoDB Server's authorization subsystem permits a user with valid credentials to bypass IP whitelisting protection mechanisms following administrative action. This issue affects MongoDB Server v4.2 versions prior to 4.2.3; MongoDB Server v4.0 versions prior to 4.0.15; MongoDB Server v4.3 versions prior to 4.3.3and MongoDB Server v3.6 versions prior to 3.6.18.

Published 2020-05-06 15:15:12

Updated 2024-01-23 15:15:12

Source MongoDB, Inc.

View at NVD, CVE.org

Products affected by CVE-2020-7921

Mongodb » Mongodb
Versions from including (>=) 3.6.0 and before (<) 3.6.18
cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*
Matching versions
Mongodb » Mongodb
Versions from including (>=) 4.2.0 and before (<) 4.2.3
cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*
Matching versions
Mongodb » Mongodb
Versions from including (>=) 4.3.0 and before (<) 4.3.3
cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*
Matching versions
Mongodb » Mongodb
Versions from including (>=) 4.0.0 and before (<) 4.0.15
cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*
Matching versions

Threat overview for CVE-2020-7921

Top countries where our scanners detected CVE-2020-7921

Top open port discovered on systems with this issue 27017

IPs affected by CVE-2020-7921 6,761

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2020-7921!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2020-7921

EPSS FAQ

0.18%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 36 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-7921

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
3.5	LOW	AV:N/AC:M/Au:S/C:N/I:P/A:N	6.8	2.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: Single Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
4.6	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N	2.1	2.5	MongoDB, Inc.
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: Required Scope: Unchanged Confidentiality: Low Integrity: Low Availability: None
5.3	MEDIUM	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N	1.6	3.6	NIST
Attack Vector: Network Attack Complexity: High Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: None Integrity: High Availability: None

CWE ids for CVE-2020-7921

CWE-182 Collapse of Data into Unsafe Value

The product filters data in a way that causes it to be reduced or "collapsed" into an unsafe value that violates an expected security property.

Assigned by: cna@mongodb.com (Secondary)
CWE-863 Incorrect Authorization

The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-7921

https://jira.mongodb.org/browse/SERVER-45472

[SERVER-45472] Ensure RoleGraph can serialize authentication restrictions to BSON - MongoDB
Patch;Vendor Advisory