SB20230816280 - Server-Side Request Forgery (SSRF) in Flarum

Description

This security bulletin contains information about 1 vulnerability.

1) Server-Side Request Forgery (SSRF) (CVE-ID: CVE-2023-40033)

CWE-ID: CWE-918 - Server-Side Request Forgery (SSRF)

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

The vulnerability allows a remote user to disclose local file contents or conduct a blind server-side request forgery attack.

The vulnerability exists due to server-side request forgery in the avatar upload handling through the intervention/image package when processing an uploaded file whose contents are interpreted as a URL after MIME type spoofing. A remote user can upload a crafted file with a spoofed MIME type to disclose local file contents or conduct a blind server-side request forgery attack.

Remediation

Install update from vendor's website.

References

• https://github.com/flarum/framework/security/advisories/GHSA-67c6-q4j4-hccg
• https://github.com/advisories/GHSA-67c6-q4j4-hccg