// For flags

CVE-2021-20330

Specific replication command with malformed oplog entries can crash secondaries

Severity Score

6.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

An attacker with basic CRUD permissions on a replicated collection can run the applyOps command with specially malformed oplog entries, resulting in a potential denial of service on secondaries. This issue affects MongoDB Server v4.0 versions prior to 4.0.27; MongoDB Server v4.2 versions prior to 4.2.16; MongoDB Server v4.4 versions prior to 4.4.9.

Un atacante con permisos CRUD básicos en una colección replicada puede ejecutar el comando applyOps con entradas oplog especialmente malformadas, resultando en una potencial denegación de servicio en los secundarios. Este problema afecta a las versiones de MongoDB Server v4.0 anteriores a 4.0.25; a las versiones de MongoDB Server v4.2 anteriores a 4.2.14; a las versiones de MongoDB Server v4.4 anteriores a 4.4.6

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
Single
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2020-12-17 CVE Reserved
  • 2021-12-15 CVE Published
  • 2023-07-08 EPSS Updated
  • 2024-09-16 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-20: Improper Input Validation
CAPEC
References (1)
URL Tag Source
URL Date SRC
URL Date SRC
https://jira.mongodb.org/browse/SERVER-36263 2024-01-23
URL Date SRC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Mongodb
Search vendor "Mongodb"
 Mongodb
Search vendor "Mongodb" for product "Mongodb"
 >= 4.0.0 < 4.0.25
Search vendor "Mongodb" for product "Mongodb" and version " >= 4.0.0 < 4.0.25"
-
Affected
Mongodb
Search vendor "Mongodb"
 Mongodb
Search vendor "Mongodb" for product "Mongodb"
 >= 4.2.0 < 4.2.14
Search vendor "Mongodb" for product "Mongodb" and version " >= 4.2.0 < 4.2.14"
-
Affected
Mongodb
Search vendor "Mongodb"
 Mongodb
Search vendor "Mongodb" for product "Mongodb"
 >= 4.4.0 < 4.4.6
Search vendor "Mongodb" for product "Mongodb" and version " >= 4.4.0 < 4.4.6"
-
Affected