A bypass of adding remote files in Concrete CMS (previously concrete5) File Manager leads to remote code execution in Concrete CMS (concrete5) versions 8.5.6 and below.The external file upload feature stages files in the public directory even if they have disallowed file extensions. They are stored in a directory with a random name, but it's possible to stall the uploads and brute force the directory name. You have to be an admin with the ability to upload files, but this bug gives you the ability to upload restricted file types and execute them depending on server configuration.To fix this, a check for allowed file extensions was added before downloading files to a tmp directory.Concrete CMS Security Team gave this a CVSS v3.1 score of 5.4 AV:N/AC:H/PR:H/UI:R/S:C/C:N/I:H/A:NThis fix is also in Concrete version 9.0.0
                
            Metrics
Affected Vendors & Products
Advisories
    | Source | ID | Title | 
|---|---|---|
  EUVD | 
                EUVD-2021-2344 | A bypass of adding remote files in Concrete CMS (previously concrete5) File Manager leads to remote code execution in Concrete CMS (concrete5) versions 8.5.6 and below.The external file upload feature stages files in the public directory even if they have disallowed file extensions. They are stored in a directory with a random name, but it's possible to stall the uploads and brute force the directory name. You have to be an admin with the ability to upload files, but this bug gives you the ability to upload restricted file types and execute them depending on server configuration.To fix this, a check for allowed file extensions was added before downloading files to a tmp directory.Concrete CMS Security Team gave this a CVSS v3.1 score of 5.4 AV:N/AC:H/PR:H/UI:R/S:C/C:N/I:H/A:NThis fix is also in Concrete version 9.0.0 | 
  Github GHSA | 
                GHSA-g3p2-hfqr-9m25 | Improper file handling in concrete5/core | 
Fixes
    Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
        History
                    No history.
Status: PUBLISHED
Assigner: hackerone
Published:
Updated: 2024-08-03T18:58:25.951Z
Reserved: 2021-01-06T00:00:00
Link: CVE-2021-22968
No data.
Status : Modified
Published: 2021-11-19T19:15:08.437
Modified: 2024-11-21T05:51:02.480
Link: CVE-2021-22968
No data.
                        OpenCVE Enrichment
                    No data.
 EUVD
 Github GHSA