PT-2021-18378 · Apache · Apache Http Server

Moritz Friedmann + 1 · Published 2021-04-07 · Updated 2021-04-13 · CVE-2021-29641

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Directus 8 versions prior to 8.8.2

Description The issue allows remote authenticated users to execute arbitrary code. This is possible because file-upload permissions include the ability to upload a .php file to the main upload directory and/or upload a .php file and a .htaccess file to a subdirectory. The exploitation is successful only for certain installations with the Apache HTTP Server and the local-storage driver.

Recommendations For Directus 8 versions prior to 8.8.2, update to version 8.8.2 or later to resolve the issue. As a temporary workaround, consider restricting file upload permissions to prevent the upload of .php and .htaccess files.

Exploit

Fix

Unrestricted File Upload

Weakness Enumeration

CWE-434

Related Identifiers

CVE-2021-29641

Affected Products

Apache Http Server

References · 7

• 🔥 http://seclists.org/fulldisclosure/2021/Apr/14 · Exploit
• 🔥 http://packetstormsecurity.com/files/162118/Monospace-Directus-Headless-CMS-File-Upload-Rule-Bypass.html · Exploit
• 🔥 https://sec-consult.com/vulnerability-lab/advisory/arbitrary-file-upload-and-bypassing-htaccess-rules-in-monospace-directus-headless-cms · Exploit
• 🔥 https://sec-consult.com/de/vulnerability-lab/advisory/arbitrary-file-upload-and-bypassing-htaccess-rules-in-monospace-directus-headless-cms · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-29641 · Security Note
• https://osv.dev/vulnerability/CVE-2021-29641 · Vendor Advisory
• https://hub.docker.com/layers/directus/directus/v8.8.2-apache/images/sha256-d9898b6442b0150c3c377b50e706757f35d2d563bd82ddaf97f3ae4ba450a6e6?context=explore · Note