PT-2021-20318 · Fortinet · Fortilogger

Berkan Erb3R · Published 2021-02-01 · Updated 2021-03-31 · CVE-2021-3378

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions: FortiLogger version 4.4.2.2

Description: The issue allows for Arbitrary File Upload by sending a "Content-Type: image/png" header to "Config/SaveUploadedHotspotLogoFile" and then visiting "Assets/temp/hotspot/img/logohotspot.asp". This can be exploited by manipulating the Content-Type header.

Recommendations: For FortiLogger version 4.4.2.2, as a temporary workaround, consider restricting access to the "Config/SaveUploadedHotspotLogoFile" endpoint and the "Assets/temp/hotspot/img/logohotspot.asp" file until a patch is available. Avoid using the "Content-Type: image/png" header in the affected endpoint until the issue is resolved.

Exploit

Fix

Unrestricted File Upload

Weakness Enumeration

CWE-434

Related Identifiers

CVE-2021-3378

Affected Products

Fortilogger

References · 9

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/http/fortilogger_arbitrary_fileupload.rb · Exploit
• 🔥 https://github.com/erberkan/fortilogger_arbitrary_fileupload · Exploit
• 🔥 http://packetstormsecurity.com/files/161974/FortiLogger-Arbitrary-File-Upload.html · Exploit
• 🔥 http://packetstormsecurity.com/files/161601/FortiLogger-4.4.2.2-Arbitrary-File-Upload.html · Exploit
• 🔥 https://exploit-db.com/exploits/49600 · Exploit
• https://osv.dev/vulnerability/CVE-2021-3378 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-3378 · Security Note
• https://t.me/cvenotify/12386 · Telegram Post
• https://t.me/cibsecurity/22933 · Telegram Post