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CVE-2021-20328— MongoDB Java driver client-side field level encryption not verifying KMS host name

Quick assessment

Affected
MongoDB Inc. mongo-java-driver
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mongodb Server是美国Mongodb公司的一套开源的NoSQL数据库。该数据库提供面向集合的存储、动态查询、数据复制及自动故障转移等功能。 MongoDB Java driver client-side 存在安全漏洞，攻击者可利用该漏洞导致Java驱动程序和KMS服务之间的通信被拦截，从而使字段级加密无效。

CVSS 6.4 · Medium EPSS 0.43% · P36
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I. Basic Information for CVE-2021-20328

Vulnerability Information
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Vulnerability Title
MongoDB Java driver client-side field level encryption not verifying KMS host name
Source: CVE Program / CVE List V5
Vulnerability Description
Specific versions of the Java driver that support client-side field level encryption (CSFLE) fail to perform correct host name verification on 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 Java driver and the KMS service rendering Field Level Encryption ineffective. This issue was discovered during internal testing and affects all versions of the Java driver that support CSFLE. The Java async, Scala, and reactive streams drivers are not impacted. This vulnerability does not impact driver traffic payloads with CSFLE-supported key services originating from applications residing inside the AWS, GCP, and Azure network fabrics due to compensating controls in these environments. This issue does not impact driver workloads that don’t use Field Level Encryption.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
MongoDB 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mongodb Server是美国Mongodb公司的一套开源的NoSQL数据库。该数据库提供面向集合的存储、动态查询、数据复制及自动故障转移等功能。 MongoDB Java driver client-side 存在安全漏洞，攻击者可利用该漏洞导致Java驱动程序和KMS服务之间的通信被拦截，从而使字段级加密无效。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
MongoDB Inc. mongo-java-driver 3.11 ~ 3.11.2 -
MongoDB Inc. mongodb-driver 3.11 ~ 3.11.2 -
MongoDB Inc. mongodb-driver-sync 4.2.0 -
MongoDB Inc. mongodb-driver-legacy 4.2.0 -

II. Public POCs for CVE-2021-20328

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III. Intelligence Information for CVE-2021-20328

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Other References for CVE-2021-20328 (1)

IV. Related Vulnerabilities

Same vendor: MongoDB Inc.
Same weakness: CWE-295

V. Comments for CVE-2021-20328

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