Vulnerability in Mongodb Libmongocrypt
CVE-2021-20327
A specific version of the Node.js mongodb-client-encryption module does not perform correct validation of the KMS server’s certificate. This vulnerability in combination with a privileged network position active MITM attack could result in interception of traffic between the Node.js driver and the KMS service rendering client-side field level encryption (CSFLE) ineffective. This issue was discovered during internal testing and affects mongodb-client-encryption module version 1.2.0, which was available from 2021-Jan-29 and deprecated in the NPM Registry on 2021-Feb-04. This vulnerability does not impact driver traffic payloads with CSFLE-supported key services from applications residing inside the AWS, GCP, and Azure nework fabrics due to compensating controls in these environments. This issue does not impact driver workloads that don’t use Field Level Encryption. This issue affect MongoDB Node.js Driver mongodb-client-encryption module version 1.2.0
Vulnerability class: Improper Certificate Validation
EPSS: 0.002 (10.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N.
Affected products
- Mongodb Libmongocrypt — versions 1.2.0
- Mongodb Inc. Node.js Driver Mongodb-client-encryption Module — versions 1.2.0
Weakness classification (CWE)
References
- cna@mongodb.com (x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-20327?
- CVE-2021-20327 is a medium-severity vulnerability in Mongodb Libmongocrypt, classified under Improper Certificate Validation. CVSS score: 6.4/10. Published 2021-02-25.
- How severe is CVE-2021-20327?
- Medium severity. CVSS v3 base score is 6.4 out of 10.