// For flags

CVE-2021-26920

Apache Druid: The HTTP inputSource allows authenticated users to read data from other sources than intended

Severity Score

6.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

In the Druid ingestion system, the InputSource is used for reading data from a certain data source. However, the HTTP InputSource allows authenticated users to read data from other sources than intended, such as the local file system, with the privileges of the Druid server process. This is not an elevation of privilege when users access Druid directly, since Druid also provides the Local InputSource, which allows the same level of access. But it is problematic when users interact with Druid indirectly through an application that allows users to specify the HTTP InputSource, but not the Local InputSource. In this case, users could bypass the application-level restriction by passing a file URL to the HTTP InputSource.

En el sistema de ingestión de Druid, el InputSource es usado para leer datos de una determinada fuente de datos. Sin embargo, el HTTP InputSource permite a usuarios autenticados leer datos de otras fuentes distintas a las previstas, como el sistema de archivos local, con los privilegios del proceso del servidor Druid. Esto no es una elevación de privilegios cuando unos usuarios acceden a Druid directamente, ya que Druid también proporciona el InputSource Local, que permite el mismo nivel de acceso. Pero es problemático cuando unos usuarios interactúan con Druid indirectamente mediante una aplicación que permite a usuarios especificar el HTTP InputSource, pero no el Local InputSource. En este caso, unos usuarios podrían omitir la restricción a nivel de aplicación pasando una URL de archivo al HTTP InputSource

*Credits: This issue was discovered by chybeta from the Security Team of Alibaba Cloud.
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Attack Vector
Network
Attack Complexity
Low
Authentication
Single
Confidentiality
Partial
Integrity
None
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-02-09 CVE Reserved
  • 2021-07-02 CVE Published
  • 2023-11-08 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-610: Externally Controlled Reference to a Resource in Another Sphere
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Apache
Search vendor "Apache"
 Druid
Search vendor "Apache" for product "Druid"
 < 0.22.0
Search vendor "Apache" for product "Druid" and version " < 0.22.0"
-
Affected