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CVE-2020-7925— Denial of Service when processing malformed Role names

Quick assessment

Affected
MongoDB Inc. MongoDB Server
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 Server 存在输入验证错误漏洞，该漏洞源于角色名解析器中对用户输入的不正确验证可能导致使用未初始化的内存，从而允许未经身份验证的攻击者可利用该漏洞使用特殊设计的请求来导致服务拒绝。以下产品及版本受到影响：MongoDB Server v4.4版本至4.4.0-rc12版本，v4.2版本至4.2.9版本。

CVSS 7.5 · High EPSS 1.68% · P75

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2020-7925

Vulnerability Information
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Vulnerability Title
Denial of Service when processing malformed Role names
Source: CVE Program / CVE List V5
Vulnerability Description
Incorrect validation of user input in the role name parser may lead to use of uninitialized memory allowing an unauthenticated attacker to use a specially crafted request to cause a denial of service. This issue affects MongoDB Server v4.4 versions prior to 4.4.0-rc12; MongoDB Server v4.2 versions prior to 4.2.9.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
从输入到API的未定义行为
Source: CVE Program / CVE List V5
Vulnerability Title
Mongodb Server 输入验证错误漏洞
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 Server 存在输入验证错误漏洞，该漏洞源于角色名解析器中对用户输入的不正确验证可能导致使用未初始化的内存，从而允许未经身份验证的攻击者可利用该漏洞使用特殊设计的请求来导致服务拒绝。以下产品及版本受到影响：MongoDB Server v4.4版本至4.4.0-rc12版本，v4.2版本至4.2.9版本。
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. MongoDB Server 4.2 ~ 4.2.9 -

II. Public POCs for CVE-2020-7925

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III. Intelligence Information for CVE-2020-7925

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Other References for CVE-2020-7925 (1)

Same Patch Batch · MongoDB Inc. · 2020-11-23 · 12 CVEs total

CVE-2020-7927 8.1 HIGH Potential privilege escalation in Ops Manager API
CVE-2018-20802 6.5 MEDIUM Post-auth queries on compound index may crash mongod
CVE-2018-20803 6.5 MEDIUM Infinite loop in aggregation expression
CVE-2018-20804 6.5 MEDIUM Invariant failure in applyOps
CVE-2018-20805 6.5 MEDIUM Invariant with $elemMatch
CVE-2019-20923 6.5 MEDIUM Crash while handling internal Javascript exception types
CVE-2019-20924 6.5 MEDIUM Invariant in IndexBoundsBuilder
CVE-2019-2392 6.5 MEDIUM $mod can result in undefined behavior
CVE-2019-2393 6.5 MEDIUM Crash while joining collections with $lookup
CVE-2020-7926 6.5 MEDIUM Specific query can cause a DoS against MongoDB Server
CVE-2020-7928 6.5 MEDIUM Improper neutralization of null byte leads to read overrun

IV. Related Vulnerabilities

Same product: MongoDB Server
Same vendor: MongoDB Inc.
Same weakness: CWE-475

V. Comments for CVE-2020-7925

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