CVE-2020-7925— Denial of Service when processing malformed Role names
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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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
从输入到API的未定义行为
Source: NVD (National Vulnerability Database)
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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|---|
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- https://jira.mongodb.org/browse/SERVER-49142x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2020-7925
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
- CVE-2026-8063
Post-auth null pointer dereference when aggregating against - CVE-2026-6915
Flaw in the updateUser Command May Allow Unauthorized Config - CVE-2026-6914
MD5 checksum creation may cause availability loss - CVE-2026-5170
Users could trigger a crash of mongod primaries during promo - CVE-2026-4358
Memory safety issues in slot-based execution hash table spil
Same vendor: MongoDB Inc.
- CVE-2026-8063
Post-auth null pointer dereference when aggregating against - CVE-2026-6691
MongoDB C Driver Cyrus SASL Canonicalization Buffer Overflow - CVE-2026-6231
bson_validate may skip validation when processing certain in - CVE-2025-14847
Zlib compressed protocol header length confusion may allow m - CVE-2025-14345
Cross-Shard Failovers May Lead to Partial Transaction Commit
Same weakness: CWE-475
V. Comments for CVE-2020-7925
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