Headline

CVE-2014-2383: Full Disclosure: CVE-2014-2383 - Arbitrary file read in dompdf

dompdf.php in dompdf before 0.6.1, when DOMPDF_ENABLE_PHP is enabled, allows context-dependent attackers to bypass chroot protections and read arbitrary files via a PHP protocol and wrappers in the input_file parameter, as demonstrated by a php://filter/read=convert.base64-encode/resource in the input_file parameter.

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From: Portcullis Advisories <advisories () portcullis-security com>
Date: Wed, 23 Apr 2014 11:29:56 +0100

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 © 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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