bugtraq - CVE-2014-2383 - Arbitrary file read in dompdf

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Message-ID: <53579624.4040302@portcullis-security.com>
Date: Wed, 23 Apr 2014 11:29:56 +0100
From: Portcullis Advisories <advisories@...tcullis-security.com>
To: bugtraq@...urityfocus.com, fulldisclosure@...lists.org, vuln@...unia.com,
  moderators@...db.org
Subject: CVE-2014-2383 - Arbitrary file read in dompdf

Vulnerability title: Arbitrary file read in dompdf
CVE: CVE-2014-2383
Vendor: dompdf
Product: dompdf
Affected version: v0.6.0
Fixed version: v0.6.1 (partial fix)
Reported by: Alejo Murillo Moyas

Details:
An arbitrary file read vulnerability is present on dompdf.php file that
allows remote or local attackers to read local files using a special
crafted argument. This vulnerability requires the configuration flag
DOMPDF_ENABLE_PHP to be enabled (which is disabled by default).

Using PHP protocol and wrappers it is possible to bypass the dompdf's
"chroot" protection (DOMPDF_CHROOT) which prevents dompdf from accessing
system files or other files on the webserver. Please note that the flag
DOMPDF_ENABLE_REMOTE needs to be enabled.

Command line interface:
php dompdf.php
php://filter/read=convert.base64-encode/resource=<PATH_TO_THE_FILE>

Web interface:

http://example/dompdf.php?input_file=php://filter/read=convert.base64-encode/resource=<PATH_TO_THE_FILE>

Further details at:
https://www.portcullis-security.com/security-research-and-downloads/security-advisories/cve-2014-2383/

Copyright:
Copyright (c) Portcullis Computer Security Limited 2014, All rights
reserved worldwide. Permission is hereby granted for the electronic
redistribution of this information. It is not to be edited or altered in
any way without the express written consent of Portcullis Computer
Security Limited.

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