SB2023020158 - Dangerous file upload in Pimcore CMS

Description

This security bulletin contains information about 1 vulnerability.

1) Dangerous file upload (CVE-ID: CVE-2023-23937)

CWE-ID: CWE-434 - Unrestricted Upload of File with Dangerous Type

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:U/U:Green

The vulnerability allows a remote user to bypass implemented security restrictions.

The vulnerability exists due to insufficient validation of the file content-type during file upload when updating user profile. A remote user bypass security check by adding a valid signature (p.e. GIF89) and sending any invalid content-type. This could allow an authenticated user to upload HTML files with JS content that will be executed in the context of the domain.

Remediation

Install update from vendor's website.

References

• https://github.com/pimcore/pimcore/security/advisories/GHSA-8xv4-jj4h-qww6
• https://github.com/pimcore/pimcore/pull/14125.patch