// For flags

CVE-2020-27304

civetweb: directory traversal when using the built-in example HTTP form-based file upload mechanism via the mg_handle_form_request API

Severity Score

9.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

The CivetWeb web library does not validate uploaded filepaths when running on an OS other than Windows, when using the built-in HTTP form-based file upload mechanism, via the mg_handle_form_request API. Web applications that use the file upload form handler, and use parts of the user-controlled filename in the output path, are susceptible to directory traversal

La biblioteca web CivetWeb no comprueba las rutas de los archivos cargados cuando se ejecuta en un sistema operativo distinto de Windows, cuando es usado el mecanismo incorporado de carga de archivos basado en formularios HTTP, por medio de la API mg_handle_form_request. Las aplicaciones web que usan el manejador de formularios de carga de archivos, y usan partes del nombre de archivo controlado por el usuario en la ruta de salida, son susceptibles a un salto de directorio

A remote code execution vulnerability was found in CivetWeb (embeddable web server/library). Due to a directory traversal issue, an attacker is able to add or overwrite files that are subsequently executed which lead to impact to confidentiality, integrity, and availability of the application.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-10-19 CVE Reserved
  • 2021-10-21 CVE Published
  • 2024-07-06 EPSS Updated
  • 2024-08-04 CVE Updated
  • 2024-08-04 First Exploit
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
  • CWE-23: Relative Path Traversal
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Civetweb Project
Search vendor "Civetweb Project"
 Civetweb
Search vendor "Civetweb Project" for product "Civetweb"
 >= 1.8 < 1.15
Search vendor "Civetweb Project" for product "Civetweb" and version " >= 1.8 < 1.15"
-
Affected
Siemens
Search vendor "Siemens"
 Sinec Infrastructure Network Services
Search vendor "Siemens" for product "Sinec Infrastructure Network Services"
 < 1.0.1.1
Search vendor "Siemens" for product "Sinec Infrastructure Network Services" and version " < 1.0.1.1"
-
Affected