Tendenci 12.3.1 - CSV/ Formula Injection

vendor:

Tendenci

by:

Mufaddal Masalawala

6.5

CVSS

MEDIUM

CSV Injection

CWE

Product Name: Tendenci

Affected Version From: 12.3.1

Affected Version To: 12.3.1

Patch Exists: NO

Related CWE: N/A

CPE: a:tendenci:tendenci:12.3.1

Metasploit: N/A

Other Scripts: N/A

Platforms Tested: Kali Linux 2020.3

2020

Tendenci 12.3.1 – CSV/ Formula Injection

CSV Injection (aka Excel Macro Injection or Formula Injection) exists in Contact Us feature in Tendenci v12.3.1 via message field that is mistreated while exporting to a CSV file. To exploit this vulnerability: 1. Go to contact us page and enter the payload '=10+20+cmd|' /C calc'!A0' in the message field and submit the form 2. Login to the application and go to Forms section and export the contact us form entries 3. Click on Export and save the CSV file downloaded 4. Open the CSV file, allow all popups and our payload is executed (calculator is opened).

Mitigation:

Input validation should be done to prevent CSV injection attacks.

Source

Exploit-DB raw data:

#Exploit Title: Tendenci 12.3.1 - CSV/ Formula Injection
#Date: 2020-10-29
#Exploit Author: Mufaddal Masalawala
#Vendor Homepage: https://www.tendenci.com/
#Software Link: https://github.com/tendenci/tendenci
#Version: 12.3.1
#Payload:  =10+20+cmd|' /C calc'!A0
#Tested on: Kali Linux 2020.3
#Proof Of Concept:
CSV Injection (aka Excel Macro Injection or Formula Injection) exists in
Contact Us feature in Tendenci v12.3.1 via message field that is mistreated
while exporting to a CSV file.
To exploit this vulnerability:

   1. Go to contact us page and enter the payload "=10+20+cmd|' /C
   calc'!A0" in the message field and submit the form
   2. Login to the application and go to Forms section and export the
   contact us form entries
   3. Click on Export and save the CSV file downloaded
   4. Open the CSV file, allow all popups and our payload is executed
   (calculator is opened).