// For flags

CVE-2021-34685

Pentaho Business Analytics / Pentaho Business Server 9.1 Filename Bypass

Severity Score

7.2
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

UploadService in Hitachi Vantara Pentaho Business Analytics through 9.1 does not properly verify uploaded user files, which allows an authenticated user to upload various files of different file types. Specifically, a .jsp file is not allowed, but a .jsp. file is allowed (and leads to remote code execution).

UploadService en Hitachi Vantara Pentaho Business Analytics versiones hasta 9.1, no verifica apropiadamente los archivos de usuario cargados, que permite a un usuario autenticado cargar varios archivos de diferentes tipos. En concreto, un archivo .jsp no está permitido, pero un archivo .jsp. sí lo está (y conlleva a una ejecución de código remota)

Pentaho allows users to upload various files of different file types. The upload service is implemented under the /pentaho/UploadService endpoint. The file types allowed by the application are csv, dat, txt, tar, zip, tgz, gz, gzip. When uploading a file with an extension other than the allowed file types, the application responds with the error message of UploadFileServlet.ERROR_0011 - File type not allowed. Allowable types are csv,dat,txt,tar,zip,tgz,gz,gzip. However, the file extension check can be bypassed by including a single dot "." at the end of the filename.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
Attack Vector
Network
Attack Complexity
Low
Authentication
Single
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-06-14 CVE Reserved
  • 2021-11-05 CVE Published
  • 2024-04-22 EPSS Updated
  • 2024-08-04 CVE Updated
  • 2024-08-04 First Exploit
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-434: Unrestricted Upload of File with Dangerous Type
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Hitachi
Search vendor "Hitachi"
Vantara Pentaho
Search vendor "Hitachi" for product "Vantara Pentaho"
<= 9.1.0.0
Search vendor "Hitachi" for product "Vantara Pentaho" and version " <= 9.1.0.0"
-
Affected